def get_data_filepaths(samples_filename_or_bam_folder, input_is_bigwig):
# check folder or sample filename
if not os.path.exists(samples_filename_or_bam_folder):
error("The file or folder %s doesn't exist. Exiting." %
samples_filename_or_bam_folder)
sys.exit(1)
if os.path.isfile(samples_filename_or_bam_folder):
data_filenames = []
sample_names = []
with open(samples_filename_or_bam_folder) as infile:
for line in infile:
if not line.strip():
continue
if line.startswith('#'): # skip optional header line
info('Skipping header/comment line:%s' % line)
continue
fields = line.strip().split()
n_fields = len(fields)
if n_fields == 2:
sample_names.append(fields[0])
data_filenames.append(fields[1])
else:
error('The samples file format is wrong!')
sys.exit(1)
# dir_path = os.path.dirname(os.path.realpath(samples_filename_or_bam_folder))
# data_filenames = [os.path.join(dir_path, filename)
# for filename in data_filenames]
else:
if input_is_bigwig:
extension_to_check = '.bw'
info('Input is set BigWig (.bw)')
else:
extension_to_check = '.bam'
info('Input is set compressed SAM (.bam)')
data_filenames = glob.glob(
os.path.join(samples_filename_or_bam_folder,
'*' + extension_to_check))
if not data_filenames:
error('No bam/bigwig files to analyze in %s. Exiting.' %
samples_filename_or_bam_folder_or_bam_folder)
sys.exit(1)
sample_names = [
os.path.basename(data_filename).replace(extension_to_check, '')
for data_filename in data_filenames
]
# check all the files before starting
info('Checking samples files location...')
for data_filename in data_filenames:
check_file(data_filename)
return sample_names, data_filenames
def get_target_motifs_filepaths(target_motifs_filepaths_file):
# check folder or sample filename
if not os.path.exists(target_motifs_filepaths_file):
error("The file or folder %s doesn't exist. Exiting." %
target_motifs_filepaths_file)
sys.exit(1)
if os.path.isfile(target_motifs_filepaths_file):
specific_regions_filenames = []
bg_regions_filenames = []
sample_names = []
with open(target_motifs_filepaths_file) as infile:
for line in infile:
if not line.strip():
continue
if line.startswith(
'#'): # skip optional header line or empty lines
info('Skipping header/comment line:%s' % line)
continue
fields = line.strip().split()
n_fields = len(fields)
if n_fields == 2:
sample_names.append(fields[0])
specific_regions_filenames.append(fields[1])
bg_regions_filenames.append("random_background")
elif n_fields == 3:
sample_names.append(fields[0])
specific_regions_filenames.append(fields[1])
bg_regions_filenames.append(fields[2])
else:
error('The samples file format is wrong!')
sys.exit(1)
# check all the files before starting
info('Checking files location...')
for specific_regions_filename in specific_regions_filenames:
check_file(specific_regions_filename)
if n_fields == 3:
# check all the files before starting
info('Checking files location...')
for bg_regions_filename in bg_regions_filenames:
check_file(bg_regions_filename)
return sample_names, specific_regions_filenames, bg_regions_filenames
def main():
print '\n[H A Y S T A C K P I P E L I N E]'
print('\n-SELECTION OF HOTSPOTS OF VARIABILITY AND ENRICHED MOTIFS- [Luca Pinello - [email protected]]\n')
print 'Version %s\n' % HAYSTACK_VERSION
#mandatory
parser = argparse.ArgumentParser(description='HAYSTACK Parameters')
parser.add_argument('samples_filename_or_bam_folder', type=str, help='A tab delimeted file with in each row (1) a sample name, (2) the path to the corresponding bam filename, (3 optional) the path to the corresponding gene expression filaneme. Alternatively it is possible to specify a folder containing some .bam files to analyze.')
parser.add_argument('genome_name', type=str, help='Genome assembly to use from UCSC (for example hg19, mm9, etc.)')
#optional
parser.add_argument('--name', help='Define a custom output filename for the report', default='')
parser.add_argument('--output_directory',type=str, help='Output directory (default: current directory)',default='')
parser.add_argument('--bin_size', type=int,help='bin size to use(default: 500bp)',default=500)
parser.add_argument('--recompute_all',help='Ignore any file previously precalculated fot the command haystack_hotstpot',action='store_true')
parser.add_argument('--depleted', help='Look for cell type specific regions with depletion of signal instead of enrichment',action='store_true')
parser.add_argument('--input_is_bigwig', help='Use the bigwig format instead of the bam format for the input. Note: The files must have extension .bw',action='store_true')
parser.add_argument('--disable_quantile_normalization',help='Disable quantile normalization (default: False)',action='store_true')
parser.add_argument('--transformation',type=str,help='Variance stabilizing transformation among: none, log2, angle (default: angle)',default='angle',choices=['angle', 'log2', 'none'])
parser.add_argument('--z_score_high', type=float,help='z-score value to select the specific regions(default: 1.5)',default=1.5)
parser.add_argument('--z_score_low', type=float,help='z-score value to select the not specific regions(default: 0.25)',default=0.25)
parser.add_argument('--th_rpm',type=float,help='Percentile on the signal intensity to consider for the hotspots (default: 99)', default=99)
parser.add_argument('--meme_motifs_filename', type=str, help='Motifs database in MEME format (default JASPAR CORE 2016)')
parser.add_argument('--motif_mapping_filename', type=str, help='Custom motif to gene mapping file (the default is for JASPAR CORE 2016 database)')
parser.add_argument('--plot_all', help='Disable the filter on the TF activity and correlation (default z-score TF>0 and rho>0.3)',action='store_true')
parser.add_argument('--n_processes',type=int, help='Specify the number of processes to use. The default is #cores available.',default=multiprocessing.cpu_count())
parser.add_argument('--temp_directory', help='Directory to store temporary files (default: /tmp)', default='/tmp')
parser.add_argument('--version',help='Print version and exit.',action='version', version='Version %s' % HAYSTACK_VERSION)
args = parser.parse_args()
args_dict=vars(args)
for key,value in args_dict.items():
exec('%s=%s' %(key,repr(value)))
if meme_motifs_filename:
check_file(meme_motifs_filename)
if motif_mapping_filename:
check_file(motif_mapping_filename)
if not os.path.exists(temp_directory):
error('The folder specified with --temp_directory: %s does not exist!' % temp_directory)
sys.exit(1)
if input_is_bigwig:
extension_to_check='.bw'
info('Input is set BigWig (.bw)')
else:
extension_to_check='.bam'
info('Input is set compressed SAM (.bam)')
if name:
directory_name='HAYSTACK_PIPELINE_RESULTS_on_%s' % name
else:
directory_name='HAYSTACK_PIPELINE_RESULTS'
if output_directory:
output_directory=os.path.join(output_directory,directory_name)
else:
output_directory=directory_name
#check folder or sample filename
USE_GENE_EXPRESSION=True
if os.path.isfile(samples_filename_or_bam_folder):
BAM_FOLDER=False
bam_filenames=[]
gene_expression_filenames=[]
sample_names=[]
with open(samples_filename_or_bam_folder) as infile:
for line in infile:
if not line.strip():
continue
if line.startswith('#'): #skip optional header line or empty lines
info('Skipping header/comment line:%s' % line)
continue
fields=line.strip().split()
n_fields=len(fields)
if n_fields==2:
USE_GENE_EXPRESSION=False
sample_names.append(fields[0])
bam_filenames.append(fields[1])
elif n_fields==3:
USE_GENE_EXPRESSION=USE_GENE_EXPRESSION and True
sample_names.append(fields[0])
bam_filenames.append(fields[1])
gene_expression_filenames.append(fields[2])
else:
error('The samples file format is wrong!')
sys.exit(1)
else:
if os.path.exists(samples_filename_or_bam_folder):
BAM_FOLDER=True
USE_GENE_EXPRESSION=False
bam_filenames=glob.glob(os.path.join(samples_filename_or_bam_folder,'*'+extension_to_check))
if not bam_filenames:
error('No bam/bigwig files to analyze in %s. Exiting.' % samples_filename_or_bam_folder)
sys.exit(1)
sample_names=[os.path.basename(bam_filename).replace(extension_to_check,'') for bam_filename in bam_filenames]
else:
error("The file or folder %s doesn't exist. Exiting." % samples_filename_or_bam_folder)
sys.exit(1)
#check all the files before starting
info('Checking samples files location...')
for bam_filename in bam_filenames:
check_file(bam_filename)
if USE_GENE_EXPRESSION:
for gene_expression_filename in gene_expression_filenames:
check_file(gene_expression_filename)
if not os.path.exists(output_directory):
os.makedirs(output_directory)
#copy back the file used
if not BAM_FOLDER:
shutil.copy2(samples_filename_or_bam_folder,output_directory)
#write hotspots conf files
sample_names_hotspots_filename=os.path.join(output_directory,'sample_names_hotspots.txt')
with open(sample_names_hotspots_filename,'w+') as outfile:
for sample_name,bam_filename in zip(sample_names,bam_filenames):
outfile.write('%s\t%s\n' % (sample_name, bam_filename))
#write tf activity conf files
if USE_GENE_EXPRESSION:
sample_names_tf_activity_filename=os.path.join(output_directory,'sample_names_tf_activity.txt')
with open(sample_names_tf_activity_filename,'w+') as outfile:
for sample_name,gene_expression_filename in zip(sample_names,gene_expression_filenames):
outfile.write('%s\t%s\n' % (sample_name, gene_expression_filename))
tf_activity_directory=os.path.join(output_directory,'HAYSTACK_TFs_ACTIVITY_PLANES')
#CALL HAYSTACK HOTSPOTS
cmd_to_run='haystack_hotspots %s %s --output_directory %s --bin_size %d %s %s %s %s %s %s %s %s' % \
(sample_names_hotspots_filename, genome_name,output_directory,bin_size,
('--recompute_all' if recompute_all else ''),
('--depleted' if depleted else ''),
('--input_is_bigwig' if input_is_bigwig else ''),
('--disable_quantile_normalization' if disable_quantile_normalization else ''),
'--transformation %s' % transformation,
'--z_score_high %f' % z_score_high,
'--z_score_low %f' % z_score_low,
'--th_rpm %f' % th_rpm)
print cmd_to_run
sb.call(cmd_to_run ,shell=True,env=system_env)
#CALL HAYSTACK MOTIFS
motif_directory=os.path.join(output_directory,'HAYSTACK_MOTIFS')
for sample_name in sample_names:
specific_regions_filename=os.path.join(output_directory,'HAYSTACK_HOTSPOTS','SPECIFIC_REGIONS','Regions_specific_for_%s*.bed' %sample_name)
bg_regions_filename=glob.glob(os.path.join(output_directory,'HAYSTACK_HOTSPOTS','SPECIFIC_REGIONS','Background_for_%s*.bed' %sample_name))[0]
#bg_regions_filename=glob.glob(specific_regions_filename.replace('Regions_specific','Background')[:-11]+'*.bed')[0] #lo zscore e' diverso...
#print specific_regions_filename,bg_regions_filename
cmd_to_run='haystack_motifs %s %s --bed_bg_filename %s --output_directory %s --name %s' % (specific_regions_filename,genome_name, bg_regions_filename,motif_directory, sample_name)
if meme_motifs_filename:
cmd_to_run+=' --meme_motifs_filename %s' % meme_motifs_filename
if n_processes:
cmd_to_run+=' --n_processes %d' % n_processes
if temp_directory:
cmd_to_run+=' --temp_directory %s' % temp_directory
print cmd_to_run
sb.call(cmd_to_run,shell=True,env=system_env)
if USE_GENE_EXPRESSION:
#CALL HAYSTACK TF ACTIVITY
motifs_output_folder=os.path.join(motif_directory,'HAYSTACK_MOTIFS_on_%s' % sample_name)
if os.path.exists(motifs_output_folder):
cmd_to_run='haystack_tf_activity_plane %s %s %s --output_directory %s' %(motifs_output_folder,sample_names_tf_activity_filename,sample_name,tf_activity_directory)
if motif_mapping_filename:
cmd_to_run+=' --motif_mapping_filename %s' % motif_mapping_filename
if plot_all:
cmd_to_run+=' --plot_all'
print cmd_to_run
sb.call(cmd_to_run,shell=True,env=system_env)
def main(input_args=None):
print('\n[H A Y S T A C K M O T I F S]')
print(
'\n-MOTIF ENRICHMENT ANALYSIS- [Luca Pinello - [email protected]]\n'
)
print('Version %s\n' % HAYSTACK_VERSION)
bootstrap = False
ngram_correction = 'g'
parser = get_args_motif()
args = parser.parse_args(input_args)
args.n_processes = max(1, args.n_processes - 1)
args_dict = vars(args)
for key, value in args_dict.items():
if key == 'n_target_coordinates':
n_target_coordinates = value
else:
exec('%s=%s' % (key, repr(value)))
bed_score_column -= 1
if no_c_g_correction:
c_g_correction = False
else:
c_g_correction = True
if no_random_sampling_target:
random_sampling_target = False
else:
random_sampling_target = True
check_file(bed_target_filename)
if not bed_bg_filename == 'random_background':
check_file(bed_bg_filename)
if meme_motifs_filename:
check_file(meme_motifs_filename)
else:
meme_motifs_filename = os.path.join(
determine_path('motif_databases'),
'JASPAR_CORE_2016_vertebrates.meme')
annotation_directory = determine_path('gene_annotations')
if gene_annotations_filename:
if which('java') is None:
error(
'The mapping to the closest gene requires Java free available from: http://java.com/en/download/'
)
use_gene_annotations = False
else:
check_file(gene_annotations_filename)
info('Using %s as gene annotations file' %
gene_annotations_filename)
use_gene_annotations = True
else:
gene_annotations_filename = os.path.join(annotation_directory,
'%s_genes.bed' % genome_name)
gene_ids_to_names_filename = os.path.join(
annotation_directory, '%s_genes_id_to_names' % genome_name)
if os.path.exists(gene_annotations_filename) and os.path.exists(
gene_ids_to_names_filename):
use_gene_annotations = True
else:
use_gene_annotations = False
info('No gene annotations file specified')
genome, _, nucleotide_bg_filename = initialize_genome(genome_name)
target_name = ntpath.basename(bed_target_filename.replace('.bed', ''))
bg_name = ntpath.basename(bed_bg_filename.replace('.bed', ''))
# timestamp=(datetime.datetime.now().isoformat()[:-3].replace('T','(')+str(np.random.randint(10000))+')').replace(':','.')
if name:
directory_name = 'HAYSTACK_MOTIFS_on_' + name
else:
directory_name = 'HAYSTACK_on_' + target_name + '_VS_' + bg_name
if output_directory:
output_directory = os.path.join(output_directory, directory_name)
else:
output_directory = directory_name
info(
'###PARAMETERS USED###\n\t\t -TARGET: %s \n\t\t -BACKGROUND: %s \n\t\t -BG_TARGET_RATIO: %s\n\t\t -C+G CORRECTION: %s\n\t\t -MASKING REPETITIVE: %s\n\t\t -COORDINATES TO ANALYZE: %s\n\t\t -OUTPUT DIRECTORY: %s\n' \
% (bed_target_filename, bed_bg_filename, str(bg_target_ratio), str(c_g_correction), str(mask_repetitive),
'ALL' if np.isinf(n_target_coordinates) else str(n_target_coordinates), output_directory))
N_TARGET = None
N_BG = None
COMMAND_USED = ' '.join(sys.argv)
_n_target_coordinates = n_target_coordinates
info('Loading Target coordinates from bed:%s' % bed_target_filename)
target_coords = Coordinate.bed_to_coordinates(bed_target_filename,
cl_score=bed_score_column)
if len(target_coords) == 0:
info('No coordinates to analyze in your input file. Exiting.')
sys.exit(1)
# calculate automatically the average lenght of the target regions
if internal_window_length:
info('Using the user defined internal window length:%d' %
internal_window_length)
if internal_window_length % 2:
internal_window_length += 1
else:
internal_window_length = int(np.mean(map(len, target_coords)))
if internal_window_length % 2:
internal_window_length += 1
info(
'Using the average length of target coordinates as internal window length:%d'
% internal_window_length)
if not window_length:
window_length = internal_window_length * 5
info('Total window length:%d' % window_length)
if not smooth_size:
smooth_size = internal_window_length / 5
target_coords = Coordinate.coordinates_of_intervals_around_center(
target_coords, internal_window_length)
if len(target_coords) > n_target_coordinates:
if random_sampling_target:
info('Sampling %d coordinates among the %d total' %
(n_target_coordinates, len(target_coords)))
target_coords = random.sample(target_coords, n_target_coordinates)
else:
info('Selecting the best %d coordinates among the %d total' %
(n_target_coordinates, len(target_coords)))
sorted_idxs_by_score = np.argsort([c.score
for c in target_coords])[::-1]
target_coords = [
target_coords[idx]
for idx in sorted_idxs_by_score[:n_target_coordinates]
]
else:
if random_sampling_target and bootstrap and not np.isinf(
n_target_coordinates):
warn('Number of target regions < %d' % n_target_coordinates)
info('bootstrapping to obtain enough target regions')
target_coords = sample_wr(target_coords, n_target_coordinates)
else:
info('Using all the %d target coordinates' % len(target_coords))
info('Extracting Motifs in target coordinates')
positive_matrix, motifs_profiles_in_sequences, idxs_seqs_with_motif, motif_coords_in_seqs_with_motif, motif_names, motif_ids = parallel_fimo_scanning(
target_coords,
meme_motifs_filename,
genome,
nucleotide_bg_filename,
temp_directory=temp_directory,
p_value=p_value,
mask_repetitive=mask_repetitive,
window_length=window_length,
internal_window_length=internal_window_length,
num_consumers=n_processes)
n_target_coordinates = len(target_coords) # fix for the bootstrap!
if bed_bg_filename == 'random_background':
info('Extracting Random Coordinates from the genome...')
if c_g_correction:
info('Calculating the C+G content of the target coordinates')
bg_coords = []
c_g_content_target = calculate_average_ngram_presence(
target_coords, genome, ngram_correction)
info('Extract a Matching C+G Background')
bins = np.hstack((np.linspace(0, 1, c_g_bins), np.inf))
for _ in range(bg_target_ratio):
for idx_c, c in enumerate(target_coords):
c_bin = np.nonzero(
np.histogram(c_g_content_target[idx_c], bins)[0])[0][0]
c_random_bin = -1
while c_random_bin != c_bin:
random_bpstart = np.random.randint(
1, genome.chr_len[c.chr_id] - len(c) + 1)
c_random = Coordinate(c.chr_id, random_bpstart,
random_bpstart + len(c) - 1)
seq = genome.extract_sequence(c_random)
c_g_content_c_random = (seq.count('c') +
seq.count('g')) / float(len(c))
c_random_bin = np.nonzero(
np.histogram(c_g_content_c_random, bins)[0])[0][0]
# print bg_target_ratio,c_bin,c_random_bin, ' still to match:',len(target_coords)-idx_c
bg_coords.append(c_random)
c_g_content_bg = calculate_average_ngram_presence(
bg_coords, genome, ngram_correction)
bg_hist = np.histogram(c_g_content_bg, bins)[0]
debug('original: ' +
str(np.histogram(c_g_content_target, bins)[0]))
debug('obtained:' + str(np.histogram(c_g_content_bg, bins)[0]))
else:
bg_coords = get_random_coordinates(target_coords, genome)
info('Done!')
else:
info('Loading Background Coordinates from:%s' % bed_bg_filename)
bg_coords = Coordinate.bed_to_coordinates(bed_bg_filename)
bg_coords = Coordinate.coordinates_of_intervals_around_center(
bg_coords, internal_window_length)
if use_entire_bg:
bg_target_ratio = float(len(bg_coords)) / n_target_coordinates
info('Using all the coordinates in the BG, BG/TG:%f',
bg_target_ratio)
if c_g_correction:
info('Calculating the C+G content')
c_g_content_target = calculate_average_ngram_presence(
target_coords, genome, ngram_correction)
c_g_content_bg = calculate_average_ngram_presence(
bg_coords, genome, ngram_correction)
info('Extract a Matching C+G Background')
bins = np.hstack((np.linspace(0, 1, c_g_bins), np.inf))
target_hist = np.histogram(c_g_content_target, bins)[0]
bg_hist = np.histogram(c_g_content_bg, bins)[0]
ratios = bg_hist / (target_hist * 1.0)
debug('original:%s' % target_hist)
debug('bg:%s' % bg_hist)
debug('ratios:%s' % ratios)
K_MATCH = min(
bg_target_ratio,
ratios[~np.isnan(ratios) & ~np.isinf(ratios) & (ratios > 0) &
(target_hist / float(target_hist.sum()) > 0.05)].min())
debug('K_MATCH:%d' % K_MATCH)
to_match = np.int32(np.floor(K_MATCH * target_hist))
debug('to_match:%s' % to_match)
idxs_corrected_bg = np.array([], dtype=int)
for idx_bin in range(len(bins) - 1):
idxs_matching_regions = \
np.nonzero((c_g_content_bg >= bins[idx_bin]) & (c_g_content_bg < bins[idx_bin + 1]))[0]
to_take = np.random.permutation(len(idxs_matching_regions))
to_take = to_take[range(
min(len(idxs_matching_regions), to_match[idx_bin]))]
idxs_corrected_bg = np.hstack(
(idxs_corrected_bg, idxs_matching_regions[to_take]))
debug('original:%s' % target_hist)
debug('K:%d' % K_MATCH)
debug('to sample:%s' % to_match)
debug('obtained:%s' %
np.histogram(c_g_content_bg[idxs_corrected_bg], bins)[0])
bg_coords = [bg_coords[idx] for idx in idxs_corrected_bg]
c_g_content_bg = calculate_average_ngram_presence(
bg_coords, genome, ngram_correction)
debug(np.histogram(c_g_content_bg, bins)[0])
if np.array_equal(K_MATCH * target_hist,
np.histogram(c_g_content_bg, bins)[0]):
info('C+G content perfectly matched!\n\ttarget:%s\n\tbg :%s'
% (target_hist, np.histogram(c_g_content_bg, bins)[0]))
else:
warn(
'C+G content not perfectly matched\n\ttarget:%s\n\tbg :%s'
% (target_hist, np.histogram(c_g_content_bg, bins)[0]))
debug(target_hist / np.histogram(c_g_content_bg, bins)[0])
if len(bg_coords) >= bg_target_ratio * n_target_coordinates:
bg_coords = random.sample(bg_coords,
int(bg_target_ratio * n_target_coordinates))
else:
if bootstrap and len(bg_coords) < (bg_target_ratio *
n_target_coordinates *
0.95): # allow a small tollerance!
info('bootstrapping to obtain enough background regions')
bg_coords = sample_wr(bg_coords,
int(bg_target_ratio * n_target_coordinates))
c_g_content_bg = calculate_average_ngram_presence(
bg_coords, genome, ngram_correction)
debug('After bootstrap:\n\ttarget:%s\n\tbg :%s' %
(target_hist, np.histogram(c_g_content_bg, bins)[0]))
info('Extracting Motifs in background coordinates')
negative_matrix, motifs_profiles_in_bg, idxs_seqs_with_motif_bg = parallel_fimo_scanning(
bg_coords,
meme_motifs_filename,
genome,
nucleotide_bg_filename,
temp_directory=temp_directory,
p_value=p_value,
mask_repetitive=mask_repetitive,
window_length=window_length,
internal_window_length=internal_window_length,
num_consumers=n_processes)[0:3]
# allocate date for reports
N_MOTIFS = len(motif_ids)
rankings = np.zeros(N_MOTIFS, dtype=np.int16)
motif_ratios = np.zeros(N_MOTIFS)
support_p = np.zeros(N_MOTIFS)
support_n = np.zeros(N_MOTIFS)
fisher_p_values = np.zeros(N_MOTIFS)
central_enrichment = np.zeros(N_MOTIFS)
N_seq_p = positive_matrix.shape[0]
N_seq_n = negative_matrix.shape[0]
profile_presence_p = (positive_matrix > 0).sum(0)
profile_presence_n = (negative_matrix > 0).sum(0)
support_p = profile_presence_p / float(N_seq_p)
support_n = profile_presence_n / float(N_seq_n)
internal_bpstart = window_length / 2 - internal_window_length / 2
internal_bpend = window_length / 2 + internal_window_length / 2
for idx, motif_id in enumerate(motif_ids):
fisher_p_values[idx] = stats.fisher_exact(
[[profile_presence_p[idx], N_seq_p - profile_presence_p[idx]],
[profile_presence_n[idx], N_seq_n - profile_presence_n[idx]]])[1]
central_enrichment[idx] = motifs_profiles_in_sequences[motif_id][
internal_bpstart:internal_bpend].mean() / np.hstack([
motifs_profiles_in_sequences[motif_id][:internal_bpstart],
motifs_profiles_in_sequences[motif_id][internal_bpend:]
]).mean()
motif_ratios = (support_p + 0.01) / (support_n + 0.01)
# Foundamental!
if not disable_ratio:
motif_ratios[support_p < 0.03] = 1
rankings = stats.rankdata(-motif_ratios)
# filter here positive or positive and negative#################################
if not disable_ratio:
idxs_to_keep = np.nonzero(motif_ratios > 1)[0]
else:
idxs_to_keep = range(len(motif_ratios))
rankings = rankings[idxs_to_keep]
motif_ratios = motif_ratios[idxs_to_keep]
support_p = support_p[idxs_to_keep]
support_n = support_n[idxs_to_keep]
fisher_p_values = fisher_p_values[idxs_to_keep]
central_enrichment = central_enrichment[idxs_to_keep]
motif_ids = [motif_ids[_] for _ in idxs_to_keep]
motif_names = [motif_names[_] for _ in idxs_to_keep]
motif_idxs = [_ for _ in idxs_to_keep]
try:
qvalues = estimate_qvalues(fisher_p_values)
# we test the ones only with ratio >1
except:
print fisher_p_values
# qvalues=estimate_qvalues(fisher_p_values,m=len(motif_ids))
################################################################################
# generate reports in html
info('Generating HTML report...')
imgs_directory = os.path.join(output_directory, 'images')
genes_list_directory = os.path.join(output_directory, 'genes_lists')
motif_regions_directory = os.path.join(output_directory, 'motifs_regions')
# create folders
if not os.path.exists(imgs_directory):
os.makedirs(imgs_directory)
if use_gene_annotations and not os.path.exists(genes_list_directory):
os.makedirs(genes_list_directory)
if not os.path.exists(motif_regions_directory):
os.makedirs(motif_regions_directory)
j2_env = Environment(
loader=FileSystemLoader(determine_path('extra') + '/templates/'),
trim_blocks=True)
info('DIRECTORY:%s' % determine_path('extra') + '/templates/')
template = j2_env.get_template('report_template.html')
# copy haystack logo and bg
shutil.copyfile(
determine_path('extra') + '/templates/haystack_logo.png',
os.path.join(imgs_directory, 'haystack_logo.png'))
shutil.copyfile(
determine_path('extra') + '/templates/noise.png',
os.path.join(imgs_directory, 'noise.png'))
motifs_dump = []
for i in np.argsort(rankings):
if (support_p[i] >= 0.03
or disable_ratio) and fisher_p_values[i] < 0.01 and (
motif_ratios[i] > 1 or disable_ratio
) and central_enrichment[i] > min_central_enrichment:
# if (support_p[i]>=0.01 or support_n[i]>=0.01) and fisher_p_values[i]<0.1 and (central_enrichment[i]>1.1 or central_enrichment[i]<0.9) and ( motif_ratios[i]>1.1 or motif_ratios[i]<0.9):
info('Generating logo and profile for:' + motif_ids[i])
# create motif logo
img_logo = os.path.join(imgs_directory, 'logo_' + motif_ids[i])
generate_weblogo(motif_ids[i],
meme_motifs_filename,
img_logo,
title=motif_ids[i])
generate_weblogo(motif_ids[i],
meme_motifs_filename,
img_logo,
title=motif_ids[i],
file_format='pdf')
# fix the weblogo prefix problem
img_logo_url = os.path.join('images',
'logo_' + motif_ids[i] + '.png')
# create motif enrichment profile
img_profile = os.path.join(imgs_directory,
'profile_' + motif_ids[i] + '.png')
motif_profile_target = motifs_profiles_in_sequences[
motif_ids[i]] / N_seq_p
motif_profile_bg = motifs_profiles_in_bg[motif_ids[i]] / N_seq_n
# print motif_profile_target.shape, motif_profile_bg.shape
generate_motif_profile(motif_profile_target,
motif_profile_bg,
motif_ids[i],
img_profile,
smooth_size=smooth_size,
window_size=window_length)
img_profile_url = os.path.join('images',
'profile_' + motif_ids[i] + '.png')
# create regions
info('Extracting regions with:' + motif_ids[i])
regions = os.path.join(
motif_regions_directory,
motif_ids[i] + '_motif_region_in_target.bed')
with open(regions, 'w+') as outfile:
outfile.write(
'Chromosome\tStart\tEnd\tMotif hits inside region\tNumber of hits\n'
)
for c, locations in motif_coords_in_seqs_with_motif[
motif_ids[i]].items():
outfile.write('\t'.join([
c.chr_id,
str(c.bpstart),
str(c.bpend), ';'.join([
'-'.join(map(str, map(int, l))) for l in locations
]),
str(len(locations))
]) + '\n')
regions_url = os.path.join(
'motifs_regions', motif_ids[i] + '_motif_region_in_target.bed')
# map closest downstream genes
genes_url = None
if use_gene_annotations:
info('Mapping regions with:%s to the clostest genes' %
motif_ids[i])
peak_annotator_path = os.path.join(determine_path('extra/'),
'PeakAnnotator.jar')
if gene_ids_to_names_filename:
sb.call('java -jar ' + peak_annotator_path + ' -u TSS -p %s -a %s -s %s -o %s >/dev/null 2>&1' \
% (regions, gene_annotations_filename, gene_ids_to_names_filename, genes_list_directory),
shell=True)
else:
sb.call('java -jar ' + peak_annotator_path + ' -u TSS -p %s -a %s -o %s >/dev/null 2>&1' \
% (regions, gene_annotations_filename, genes_list_directory), shell=True)
genes_url = os.path.join(
'genes_lists',
motif_ids[i] + '_motif_region_in_target.tss.bed')
motifs_dump.append({
'id': motif_ids[i],
'name': motif_names[i],
'support_p': support_p[i] * 100,
'support_n': support_n[i] * 100,
'ratio': motif_ratios[i],
'rank': float(rankings[i]),
'pvalue': fisher_p_values[i],
'qvalue': qvalues[i],
'central_enrichment': central_enrichment[i],
'img_logo': img_logo_url,
'img_profile': img_profile_url,
'regions': regions_url,
'genes': genes_url,
'idx_motif': motif_idxs[i]
})
outfile = codecs.open(
os.path.join(output_directory, "Haystack_report.html"), "w", "utf-8")
outfile.write(template.render(motifs_dump=motifs_dump, bed_target_filename=bed_target_filename,
bed_bg_filename=bed_bg_filename, N_TARGET=N_seq_p, N_BG=N_seq_n, \
meme_motifs_filename=meme_motifs_filename, COMMAND_USED=COMMAND_USED,
use_gene_annotations=use_gene_annotations))
outfile.close()
if dump:
info('Saving all the intermediate data on: %s ...' % output_directory)
dump_directory = os.path.join(output_directory, 'dump')
if not os.path.exists(dump_directory):
os.makedirs(dump_directory)
np.save(os.path.join(dump_directory, 'matrix_' + target_name),
positive_matrix)
np.save(os.path.join(dump_directory, 'matrix_BG_' + target_name),
negative_matrix)
cp.dump(
motifs_dump,
open(
os.path.join(dump_directory,
target_name + '_motif_dumps.pickle'), 'w'))
# cp.dump( motifs_profiles_in_sequences,open( os.path.join(dump_directory,target_name+'_profiles.pickle'),'w'))
# cp.dump( motifs_profiles_in_bg,open( os.path.join(dump_directory,bg_name+'_profiles.pickle'),'w'))
cp.dump(
idxs_seqs_with_motif,
open(
os.path.join(dump_directory,
target_name + '_motif_seqs_idxs.pickle'), 'w'))
cp.dump(
idxs_seqs_with_motif_bg,
open(
os.path.join(dump_directory,
bg_name + '_motif_seqs_idxs.pickle'), 'w'))
cp.dump(
motif_coords_in_seqs_with_motif,
open(
os.path.join(
dump_directory,
target_name + '_motif_coords_in_seqs_with_motif.pickle'),
'w'))
Coordinate.coordinates_to_bed(
target_coords,
os.path.join(
dump_directory,
'Target_coordinates_selected_on_' + target_name + '.bed'),
minimal_format=False)
Coordinate.coordinates_to_bed(
bg_coords,
os.path.join(dump_directory,
'BG_coordinates_selected_on_' + bg_name + '.bed'),
minimal_format=True)
#info('Motif analysis for Sample %s completed' %name)
info('Motif analysis completed! Ciao!')
def main():
print '\n[H A Y S T A C K M O T I F S]'
print('\n-MOTIF ENRICHMENT ANALYSIS- [Luca Pinello - [email protected]]\n')
print 'Version %s\n' % HAYSTACK_VERSION
bootstrap=False
ngram_correction='g'
#mandatory
parser = argparse.ArgumentParser(description='HAYSTACK Parameters')
parser.add_argument('bed_target_filename', type=str, help='A bed file containing the target coordinates on the genome of reference')
parser.add_argument('genome_name', type=str, help='Genome assembly to use from UCSC (for example hg19, mm9, etc.)')
#optional
parser.add_argument('--bed_bg_filename', type=str, help="A bed file containing the backround coordinates on the genome of reference (default random sampled regions from the genome)", default='random_background')
parser.add_argument('--meme_motifs_filename', type=str, help='Motifs database in MEME format (default JASPAR CORE 2016)')
parser.add_argument('--nucleotide_bg_filename',type=str, help='Nucleotide probability for the background in MEME format (default precomupted on the Genome)')
parser.add_argument('--p_value', type=float, help='FIMO p-value for calling a motif hit significant (deafult: 1e-4)',default=1e-4)
parser.add_argument('--no_c_g_correction', help='Disable the matching of the C+G density of the background',action='store_true')
parser.add_argument('--c_g_bins', type=int,help='Number of bins for the C+G density correction (default: 8)',default=8)
parser.add_argument('--mask_repetitive', help='Mask repetitive sequences',action='store_true')
parser.add_argument('--n_target_coordinates', type=int, help='Number of target coordinates to use (default: all)',default=np.inf)
parser.add_argument('--use_entire_bg', help='Use the entire background file (use only when the cg correction is disabled)',action='store_true')
parser.add_argument('--bed_score_column', type=int, help='Column in the bedfile that represents the score (default: 5)',default=5)
parser.add_argument('--bg_target_ratio', type=int, help='Background size/Target size ratio (default: 1.0)',default=2)
parser.add_argument('--bootstrap', help='Enable the bootstrap if the target set or the background set are too small, choices: True, False (default: False)',action='store_true')
parser.add_argument('--temp_directory', help='Directory to store temporary files (default: /tmp)', default='/tmp')
parser.add_argument('--no_random_sampling_target', help='Select the best --n_target_coordinates using the score column from the target file instead of randomly select them',action='store_true')
parser.add_argument('--name', help='Define a custom output filename for the report', default='')
parser.add_argument('--internal_window_length', type=int, help='Window length in bp for the enrichment (default: average lenght of the target sequences)')
parser.add_argument('--window_length', type=int, help='Window length in bp for the profiler (default:internal_window_length*5)')
parser.add_argument('--min_central_enrichment', type=float, help='Minimum central enrichment to report a motif (default:>1.0)',default=1.0)
parser.add_argument('--disable_ratio', help='Disable target/bg ratio filter',action='store_true')
parser.add_argument('--dump', help='Dump all the intermediate data, choices: True, False (default: False)',action='store_true')
parser.add_argument('--output_directory',type=str, help='Output directory (default: current directory)',default='')
parser.add_argument('--smooth_size',type=int, help='Size in bp for the smoothing window (default: internal_window_length/4)')
parser.add_argument('--gene_annotations_filename',type=str, help='Optional gene annotations file from the UCSC Genome Browser in bed format to map each region to its closes gene')
parser.add_argument('--gene_ids_to_names_filename',type=str, help='Optional mapping file between gene ids to gene names (relevant only if --gene_annotation_filename is used)')
parser.add_argument('--n_processes',type=int, help='Specify the number of processes to use. The default is #cores available.',default=mp.cpu_count())
parser.add_argument('--version',help='Print version and exit.',action='version', version='Version %s' % HAYSTACK_VERSION)
args = parser.parse_args()
args_dict=vars(args)
for key,value in args_dict.items():
if key=='n_target_coordinates':
n_target_coordinates=value
else:
exec('%s=%s' %(key,repr(value)))
bed_score_column-=1
if no_c_g_correction:
c_g_correction=False
else:
c_g_correction=True
if no_random_sampling_target:
random_sampling_target=False
else:
random_sampling_target=True
check_file(bed_target_filename)
if not bed_bg_filename == 'random_background':
check_file(bed_bg_filename)
if meme_motifs_filename:
check_file(meme_motifs_filename)
else:
meme_motifs_filename=os.path.join(determine_path('motif_databases'),'JASPAR_CORE_2016_vertebrates.meme')
annotation_directory=determine_path('gene_annotations')
if gene_annotations_filename:
if which('java') is None:
error('The mapping to the closest gene requires Java free available from: http://java.com/en/download/')
use_gene_annotations=False
else:
check_file(gene_annotations_filename)
info('Using %s as gene annotations file' % gene_annotations_filename)
use_gene_annotations=True
else:
gene_annotations_filename=os.path.join(annotation_directory,'%s_genes.bed' % genome_name)
gene_ids_to_names_filename=os.path.join(annotation_directory,'%s_genes_id_to_names' % genome_name)
if os.path.exists(gene_annotations_filename) and os.path.exists(gene_ids_to_names_filename):
use_gene_annotations=True
else:
use_gene_annotations=False
info('No gene annotations file specified')
target_name=ntpath.basename(bed_target_filename.replace('.bed',''))
bg_name=ntpath.basename(bed_bg_filename.replace('.bed',''))
#timestamp=(datetime.datetime.now().isoformat()[:-3].replace('T','(')+str(np.random.randint(10000))+')').replace(':','.')
if name:
directory_name='HAYSTACK_MOTIFS_on_'+name
else:
directory_name='HAYSTACK_on_'+target_name+'_VS_'+bg_name
if output_directory:
output_directory=os.path.join(output_directory, directory_name)
else:
output_directory=directory_name
info('###PARAMETERS USED###\n\t\t -TARGET: %s \n\t\t -BACKGROUND: %s \n\t\t -BG_TARGET_RATIO: %s\n\t\t -C+G CORRECTION: %s\n\t\t -MASKING REPETITIVE: %s\n\t\t -COORDINATES TO ANALYZE: %s\n\t\t -OUTPUT DIRECTORY: %s\n'\
%(bed_target_filename,bed_bg_filename,str(bg_target_ratio),str(c_g_correction),str(mask_repetitive),'ALL' if np.isinf(n_target_coordinates) else str(n_target_coordinates),output_directory))
info('Initializing Genome:%s' %genome_name)
genome_directory=determine_path('genomes')
genome_2bit=os.path.join(genome_directory,genome_name+'.2bit')
if os.path.exists(genome_2bit):
genome=Genome_2bit(genome_2bit)
else:
info("\nIt seems you don't have the required genome file.")
if query_yes_no('Should I download it for you?'):
sb.call('haystack_download_genome %s' %genome_name,shell=True,env=system_env)
if os.path.exists(genome_2bit):
info('Genome correctly downloaded!')
genome=Genome_2bit(genome_2bit)
else:
error('Sorry I cannot download the required file for you. Check your Internet connection.')
sys.exit(1)
else:
error('Sorry I need the genome file to perform the analysis. Exiting...')
sys.exit(1)
if not nucleotide_bg_filename:
nucleotide_bg_filename=os.path.join(genome_directory,genome_name+'_meme_bg')
check_file(nucleotide_bg_filename)
N_TARGET=None
N_BG=None
COMMAND_USED=' '.join(sys.argv)
_n_target_coordinates=n_target_coordinates
info('Loading Target coordinates from bed:%s' % bed_target_filename)
target_coords=Coordinate.bed_to_coordinates(bed_target_filename,cl_score=bed_score_column)
if len(target_coords) == 0:
info('No coordinates to analyze in your input file. Exiting.')
sys.exit(1)
#calculate automatically the average lenght of the target regions
if internal_window_length:
info('Using the user defined internal window length:%d' % internal_window_length )
if internal_window_length % 2:
internal_window_length+=1
else:
internal_window_length=int(np.mean(map(len,target_coords)))
if internal_window_length % 2:
internal_window_length+=1
info('Using the average length of target coordinates as internal window length:%d' % internal_window_length )
if not window_length:
window_length=internal_window_length*5
info('Total window length:%d' % window_length )
if not smooth_size:
smooth_size=internal_window_length/5
target_coords=Coordinate.coordinates_of_intervals_around_center(target_coords,internal_window_length)
if len(target_coords)>n_target_coordinates:
if random_sampling_target:
info('Sampling %d coordinates among the %d total' %( n_target_coordinates,len(target_coords)))
target_coords=random.sample(target_coords,n_target_coordinates)
else:
info('Selecting the best %d coordinates among the %d total' %( n_target_coordinates,len(target_coords)))
sorted_idxs_by_score=np.argsort([c.score for c in target_coords])[::-1]
target_coords=[target_coords[idx] for idx in sorted_idxs_by_score[:n_target_coordinates]]
else:
if random_sampling_target and bootstrap and not np.isinf(n_target_coordinates):
warn('Number of target regions < %d' % n_target_coordinates)
info('bootstrapping to obtain enough target regions')
target_coords=sample_wr(target_coords,n_target_coordinates)
else:
info('Using all the %d target coordinates' % len(target_coords))
info('Extracting Motifs in target coordinates')
positive_matrix,motifs_profiles_in_sequences, idxs_seqs_with_motif,motif_coords_in_seqs_with_motif,motif_names,motif_ids=parallel_fimo_scanning(target_coords,
meme_motifs_filename,
genome,nucleotide_bg_filename,
temp_directory=temp_directory,
p_value=p_value,
mask_repetitive=mask_repetitive,
window_length=window_length,
internal_window_length=internal_window_length,
num_consumers=n_processes)
n_target_coordinates=len(target_coords) #fix for the bootstrap!
if bed_bg_filename == 'random_background':
info('Extracting Random Coordinates from the genome...')
if c_g_correction:
info('Calculating the C+G content of the target coordinates')
bg_coords=[]
c_g_content_target=calculate_average_ngram_presence(target_coords,genome,ngram_correction)
info('Extract a Matching C+G Background')
bins=np.hstack((np.linspace(0,1,c_g_bins),np.inf))
for _ in range(bg_target_ratio):
for idx_c,c in enumerate(target_coords):
c_bin=np.nonzero(np.histogram(c_g_content_target[idx_c],bins)[0])[0][0]
c_random_bin=-1
while c_random_bin != c_bin:
random_bpstart=np.random.randint(1,genome.chr_len[c.chr_id]-len(c)+1)
c_random=Coordinate(c.chr_id,random_bpstart,random_bpstart+len(c)-1)
seq=genome.extract_sequence(c_random)
c_g_content_c_random=(seq.count('c')+seq.count('g'))/float(len(c))
c_random_bin=np.nonzero(np.histogram(c_g_content_c_random,bins)[0])[0][0]
#print bg_target_ratio,c_bin,c_random_bin, ' still to match:',len(target_coords)-idx_c
bg_coords.append(c_random)
c_g_content_bg=calculate_average_ngram_presence(bg_coords,genome,ngram_correction)
bg_hist=np.histogram(c_g_content_bg,bins)[0]
debug('original: '+str(np.histogram(c_g_content_target,bins)[0]))
debug('obtained:'+str(np.histogram(c_g_content_bg,bins)[0]))
else:
bg_coords=get_random_coordinates(target_coords,genome)
info('Done!')
else:
info('Loading Background Coordinates from:%s' % bed_bg_filename)
bg_coords=Coordinate.bed_to_coordinates(bed_bg_filename)
bg_coords=Coordinate.coordinates_of_intervals_around_center(bg_coords,internal_window_length)
if use_entire_bg:
bg_target_ratio=float(len(bg_coords))/n_target_coordinates
info('Using all the coordinates in the BG, BG/TG:%f', bg_target_ratio)
if c_g_correction:
info('Calculating the C+G content')
c_g_content_target=calculate_average_ngram_presence(target_coords,genome,ngram_correction)
c_g_content_bg=calculate_average_ngram_presence(bg_coords,genome,ngram_correction)
info('Extract a Matching C+G Background')
bins=np.hstack((np.linspace(0,1,c_g_bins),np.inf))
target_hist=np.histogram(c_g_content_target,bins)[0]
bg_hist=np.histogram(c_g_content_bg,bins)[0]
ratios=bg_hist/(target_hist*1.0);
debug('original:%s' %target_hist)
debug('bg:%s' %bg_hist)
debug('ratios:%s' %ratios)
K_MATCH=min(bg_target_ratio,ratios[~np.isnan(ratios) & ~np.isinf(ratios) & (ratios>0) &(target_hist/float(target_hist.sum())>0.05)].min())
debug('K_MATCH:%d' %K_MATCH)
to_match=np.int32(np.floor(K_MATCH*target_hist))
debug('to_match:%s' %to_match)
idxs_corrected_bg=np.array([],dtype=int)
for idx_bin in range(len(bins)-1):
idxs_matching_regions=np.nonzero((c_g_content_bg>=bins[idx_bin]) & (c_g_content_bg<bins[idx_bin+1]))[0]
to_take=np.random.permutation(len(idxs_matching_regions))
to_take=to_take[range(min(len(idxs_matching_regions),to_match[idx_bin]))]
idxs_corrected_bg= np.hstack((idxs_corrected_bg,idxs_matching_regions[to_take]))
debug('original:%s' %target_hist)
debug('K:%d' %K_MATCH)
debug('to sample:%s' %to_match)
debug( 'obtained:%s' % np.histogram(c_g_content_bg[idxs_corrected_bg],bins)[0] )
bg_coords=[bg_coords[idx] for idx in idxs_corrected_bg]
c_g_content_bg=calculate_average_ngram_presence(bg_coords,genome,ngram_correction)
debug(np.histogram(c_g_content_bg,bins)[0])
if np.array_equal(K_MATCH*target_hist,np.histogram(c_g_content_bg,bins)[0]):
info('C+G content perfectly matched!\n\ttarget:%s\n\tbg :%s' % (target_hist,np.histogram(c_g_content_bg,bins)[0]))
else:
warn('C+G content not perfectly matched\n\ttarget:%s\n\tbg :%s'%(target_hist,np.histogram(c_g_content_bg,bins)[0]))
debug(target_hist/np.histogram(c_g_content_bg,bins)[0])
if len(bg_coords)>=bg_target_ratio*n_target_coordinates:
bg_coords=random.sample(bg_coords,int(bg_target_ratio*n_target_coordinates))
else:
if bootstrap and len(bg_coords)<(bg_target_ratio*n_target_coordinates*0.95): #allow a small tollerance!
info('bootstrapping to obtain enough background regions')
bg_coords=sample_wr(bg_coords,int(bg_target_ratio*n_target_coordinates))
c_g_content_bg=calculate_average_ngram_presence(bg_coords,genome,ngram_correction)
debug('After bootstrap:\n\ttarget:%s\n\tbg :%s' % (target_hist,np.histogram(c_g_content_bg,bins)[0]))
info('Extracting Motifs in background coordinates')
negative_matrix,motifs_profiles_in_bg,idxs_seqs_with_motif_bg=parallel_fimo_scanning(bg_coords,
meme_motifs_filename,
genome,nucleotide_bg_filename,
temp_directory=temp_directory,
p_value=p_value,
mask_repetitive=mask_repetitive,
window_length=window_length,
internal_window_length=internal_window_length,
num_consumers=n_processes)[0:3]
#allocate date for reports
N_MOTIFS=len(motif_ids)
rankings=np.zeros(N_MOTIFS,dtype=np.int16)
motif_ratios=np.zeros(N_MOTIFS)
support_p=np.zeros(N_MOTIFS)
support_n=np.zeros(N_MOTIFS)
fisher_p_values=np.zeros(N_MOTIFS)
central_enrichment=np.zeros(N_MOTIFS)
N_seq_p=positive_matrix.shape[0]
N_seq_n=negative_matrix.shape[0]
profile_presence_p=(positive_matrix>0).sum(0)
profile_presence_n=(negative_matrix>0).sum(0)
support_p=profile_presence_p/float(N_seq_p)
support_n=profile_presence_n/float(N_seq_n)
internal_bpstart=window_length/2-internal_window_length/2
internal_bpend=window_length/2+internal_window_length/2
for idx,motif_id in enumerate(motif_ids):
fisher_p_values[idx]= stats.fisher_exact([[ profile_presence_p[idx], N_seq_p-profile_presence_p[idx]], [ profile_presence_n[idx], N_seq_n-profile_presence_n[idx]]])[1]
central_enrichment[idx]=motifs_profiles_in_sequences[motif_id][internal_bpstart:internal_bpend].mean()/ np.hstack([motifs_profiles_in_sequences[motif_id][:internal_bpstart],motifs_profiles_in_sequences[motif_id][internal_bpend:]]).mean()
motif_ratios=(support_p+0.01)/(support_n+0.01)
#Foundamental!
if not disable_ratio:
motif_ratios[support_p<0.03]=1
rankings=stats.rankdata(-motif_ratios)
#filter here positive or positive and negative#################################
if not disable_ratio:
idxs_to_keep=np.nonzero(motif_ratios>1)[0]
else:
idxs_to_keep=range(len(motif_ratios))
rankings=rankings[idxs_to_keep]
motif_ratios=motif_ratios[idxs_to_keep]
support_p=support_p[idxs_to_keep]
support_n=support_n[idxs_to_keep]
fisher_p_values=fisher_p_values[idxs_to_keep]
central_enrichment=central_enrichment[idxs_to_keep]
motif_ids=[motif_ids[_] for _ in idxs_to_keep]
motif_names=[motif_names[_] for _ in idxs_to_keep]
motif_idxs=[_ for _ in idxs_to_keep]
try:
qvalues=estimate_qvalues(fisher_p_values); # we test the ones only with ratio >1
except:
print fisher_p_values
#qvalues=estimate_qvalues(fisher_p_values,m=len(motif_ids))
################################################################################
#generate reports in html
info('Generating HTML report...')
imgs_directory=os.path.join(output_directory,'images')
genes_list_directory=os.path.join(output_directory,'genes_lists')
motif_regions_directory=os.path.join(output_directory,'motifs_regions')
#create folders
if not os.path.exists(imgs_directory):
os.makedirs(imgs_directory)
if use_gene_annotations and not os.path.exists(genes_list_directory):
os.makedirs(genes_list_directory)
if not os.path.exists(motif_regions_directory):
os.makedirs(motif_regions_directory)
j2_env = Environment(loader=FileSystemLoader(determine_path('extra')+'/templates/'),trim_blocks=True)
info('DIRECTORY:%s' % determine_path('extra')+'/templates/')
template= j2_env.get_template('report_template.html')
#copy haystack logo and bg
shutil.copyfile(determine_path('extra')+'/templates/haystack_logo.png', os.path.join(imgs_directory,'haystack_logo.png'))
shutil.copyfile(determine_path('extra')+'/templates/noise.png', os.path.join(imgs_directory,'noise.png'))
motifs_dump=[]
for i in np.argsort(rankings):
if (support_p[i]>=0.03 or disable_ratio) and fisher_p_values[i]<0.01 and (motif_ratios[i]>1 or disable_ratio) and central_enrichment[i]>min_central_enrichment:
#if (support_p[i]>=0.01 or support_n[i]>=0.01) and fisher_p_values[i]<0.1 and (central_enrichment[i]>1.1 or central_enrichment[i]<0.9) and ( motif_ratios[i]>1.1 or motif_ratios[i]<0.9):
info('Generating logo and profile for:'+motif_ids[i])
#create motif logo
img_logo=os.path.join(imgs_directory,'logo_'+motif_ids[i])
generate_weblogo(motif_ids[i],meme_motifs_filename,img_logo,title=motif_ids[i],SEQLOGO=determine_path('extra')+'/seqlogo')
generate_weblogo(motif_ids[i],meme_motifs_filename,img_logo,title=motif_ids[i],SEQLOGO=determine_path('extra')+'/seqlogo',file_format='pdf')
#fix the weblogo prefix problem
img_logo_url=os.path.join('images','logo_'+motif_ids[i]+'.png')
#create motif enrichment profile
img_profile=os.path.join(imgs_directory,'profile_'+motif_ids[i]+'.png')
motif_profile_target=motifs_profiles_in_sequences[motif_ids[i]]/N_seq_p
motif_profile_bg=motifs_profiles_in_bg[motif_ids[i]]/N_seq_n
#print motif_profile_target.shape, motif_profile_bg.shape
generate_motif_profile(motif_profile_target,motif_profile_bg,motif_ids[i],img_profile,smooth_size=smooth_size,window_size=window_length)
img_profile_url=os.path.join('images','profile_'+motif_ids[i]+'.png')
#create regions
info('Extracting regions with:'+motif_ids[i])
regions=os.path.join(motif_regions_directory,motif_ids[i]+'_motif_region_in_target.bed')
with open(regions,'w+') as outfile:
outfile.write('Chromosome\tStart\tEnd\tMotif hits inside region\tNumber of hits\n')
for c,locations in motif_coords_in_seqs_with_motif[motif_ids[i]].items():
outfile.write('\t'.join([c.chr_id,str(c.bpstart),str(c.bpend),';'.join(['-'.join(map(str,map(int,l))) for l in locations]),str(len(locations))])+'\n')
regions_url=os.path.join('motifs_regions',motif_ids[i]+'_motif_region_in_target.bed')
#map closest downstream genes
genes_url=None
if use_gene_annotations:
info('Mapping regions with:%s to the clostest genes' % motif_ids[i])
peak_annotator_path=os.path.join(determine_path('extra/'),'PeakAnnotator.jar')
if gene_ids_to_names_filename:
sb.call('java -jar '+peak_annotator_path+' -u TSS -p %s -a %s -s %s -o %s >/dev/null 2>&1' \
%(regions,gene_annotations_filename,gene_ids_to_names_filename,genes_list_directory), shell=True,env=system_env)
else:
sb.call('java -jar '+peak_annotator_path+' -u TSS -p %s -a %s -o %s >/dev/null 2>&1' \
%(regions,gene_annotations_filename,genes_list_directory), shell=True,env=system_env)
genes_url=os.path.join('genes_lists',motif_ids[i]+'_motif_region_in_target.tss.bed')
motifs_dump.append({'id':motif_ids[i],'name':motif_names[i],'support_p':support_p[i]*100,
'support_n':support_n[i]*100, 'ratio':motif_ratios[i],'rank':float(rankings[i]),
'pvalue':fisher_p_values[i],'qvalue':qvalues[i],'central_enrichment':central_enrichment[i],
'img_logo':img_logo_url,'img_profile':img_profile_url,'regions':regions_url,'genes':genes_url,'idx_motif':motif_idxs[i]})
outfile= codecs.open(os.path.join(output_directory,"Haystack_report.html"), "w", "utf-8")
outfile.write(template.render(motifs_dump=motifs_dump,bed_target_filename=bed_target_filename,bed_bg_filename=bed_bg_filename, N_TARGET=N_seq_p, N_BG=N_seq_n,\
meme_motifs_filename=meme_motifs_filename, COMMAND_USED=COMMAND_USED,use_gene_annotations=use_gene_annotations))
outfile.close()
if dump:
info('Saving all the intermediate data on: %s ...' % output_directory)
dump_directory=os.path.join(output_directory,'dump')
if not os.path.exists(dump_directory):
os.makedirs(dump_directory)
np.save(os.path.join(dump_directory,'matrix_'+target_name),positive_matrix)
np.save(os.path.join(dump_directory,'matrix_BG_'+target_name),negative_matrix)
cp.dump(motifs_dump,open(os.path.join(dump_directory,target_name+'_motif_dumps.pickle'),'w'))
#cp.dump( motifs_profiles_in_sequences,open( os.path.join(dump_directory,target_name+'_profiles.pickle'),'w'))
#cp.dump( motifs_profiles_in_bg,open( os.path.join(dump_directory,bg_name+'_profiles.pickle'),'w'))
cp.dump(idxs_seqs_with_motif,open(os.path.join(dump_directory,target_name+'_motif_seqs_idxs.pickle'),'w'))
cp.dump(idxs_seqs_with_motif_bg,open(os.path.join(dump_directory,bg_name+'_motif_seqs_idxs.pickle'),'w'))
cp.dump(motif_coords_in_seqs_with_motif,open(os.path.join(dump_directory,target_name+'_motif_coords_in_seqs_with_motif.pickle'),'w'))
Coordinate.coordinates_to_bed(target_coords,os.path.join(dump_directory,'Target_coordinates_selected_on_'+target_name+'.bed'),minimal_format=False)
Coordinate.coordinates_to_bed(bg_coords,os.path.join(dump_directory,'BG_coordinates_selected_on_'+ bg_name+'.bed'),minimal_format=True)
info('All done! Ciao!')
sys.exit(0)
def main():
print '\n[H A Y S T A C K T F A C T I V I T Y P L A N E]'
print(
'\n-TFs Activity on Gene Expression- [Luca Pinello - [email protected]]\n'
)
print 'Version %s\n' % HAYSTACK_VERSION
#mandatory
parser = argparse.ArgumentParser(description='HAYSTACK Parameters',
prog='haystack_tf_activity_plane')
parser.add_argument(
'haystack_motifs_output_folder',
type=str,
help='A path to a folder created by the haystack_motifs utility')
parser.add_argument(
'gene_expression_samples_filename',
type=str,
help='A file containing the list of sample names and locations')
parser.add_argument(
'target_cell_type',
type=str,
help='The sample name to use as a target for the analysis')
#optional
parser.add_argument(
'--motif_mapping_filename',
type=str,
help=
'Custom motif to gene mapping file (the default is for JASPAR CORE 2016 database)'
)
parser.add_argument('--output_directory',
type=str,
help='Output directory (default: current directory)')
parser.add_argument('--name',
help='Define a custom output filename for the report')
parser.add_argument(
'--plot_all',
help=
'Disable the filter on the TF activity and correlation (default z-score TF>0 and rho>0.3)',
action='store_true')
parser.add_argument('--version',
help='Print version and exit.',
action='version',
version='Version %s' % HAYSTACK_VERSION)
args = parser.parse_args()
args_dict = vars(args)
for key, value in args_dict.items():
exec('%s=%s' % (key, repr(value)))
if not os.path.exists(haystack_motifs_output_folder):
error("The haystack_motifs_output_folder specified: %s doesn't exist!")
sys.exit(1)
check_file(gene_expression_samples_filename)
if motif_mapping_filename:
check_file(motif_mapping_filename)
else:
motif_mapping_filename = os.path.join(
determine_path('motif_databases'),
'JASPAR_CORE_2016_vertebrates_mapped_to_gene_human_mouse.txt')
if name:
directory_name = 'HAYSTACK_TFs_ACTIVITY_PLANES_on_' + name
else:
directory_name = 'HAYSTACK_TFs_ACTIVITY_PLANES_on_' + target_cell_type
if output_directory:
output_directory = os.path.join(output_directory, directory_name)
else:
output_directory = directory_name
motif_mapping = pd.read_table(motif_mapping_filename,
header=None,
names=['MOTIF_ID', 'MOTIF_NAME', 'GENES'],
index_col=0)
motif_mapping = motif_mapping.reset_index().groupby('MOTIF_ID').apply(
group_motif_mapping)
motif_mapping = motif_mapping.set_index('MOTIF_ID')
#load mapping filename
df_gene_mapping = pd.read_table(FileWrapper(
"#", gene_expression_samples_filename, "r"),
header=None,
index_col=0,
names=['Sample_name', 'Sample_file'])
if target_cell_type not in df_gene_mapping.index:
error(
'\nThe target_cell_type must be among these sample names:\n\n%s' %
'\t'.join(df_gene_mapping.index.values))
sys.exit(1)
N_SAMPLES = df_gene_mapping.shape[0]
if N_SAMPLES == 1:
error(
'\nYou need at least gene expression for two cell-types. Exiting...'
)
sys.exit(1)
elif N_SAMPLES == 2:
USE_ZSCORE = False
bg_target_cell_type = list(
set(df_gene_mapping.index) - {target_cell_type})[0]
info(
'Only 2 samples provided, use expression ratio plane instead of z-score. Target:%s, Bg: %s'
% (target_cell_type, bg_target_cell_type))
else:
USE_ZSCORE = True
#load gene expression and calculate ranking
gene_values = []
for sample_name in df_gene_mapping.index:
info('Load gene expression file for :%s' % sample_name)
check_file(df_gene_mapping.ix[sample_name, 'Sample_file'])
gene_values.append(
pd.read_table(df_gene_mapping.ix[sample_name, 'Sample_file'],
index_col=0,
names=['Gene_Symbol', sample_name]))
gene_values = pd.concat(gene_values, axis=1)
#make names to uppercase! TODO
gene_ranking = gene_values.rank(ascending=True)
#create output folder
if not os.path.exists(output_directory):
os.makedirs(output_directory)
#For each motif make the plots
for motif_gene_filename in glob.glob(
os.path.join(haystack_motifs_output_folder, 'genes_lists') +
'/*.bed'):
current_motif_id = os.path.basename(motif_gene_filename).split('_')[0]
info('Analyzing %s from:%s' % (current_motif_id, motif_gene_filename))
#genes closeby the motif sites
mapped_genes = map(
str.upper,
list(pd.read_table(motif_gene_filename)['Symbol'].values))
#target genes average activity
if USE_ZSCORE:
ds_values = zscore_series(gene_ranking.ix[mapped_genes, :].mean())
else:
ds_values = (
gene_ranking.ix[mapped_genes, target_cell_type] /
gene_ranking.ix[mapped_genes, bg_target_cell_type]).mean()
if current_motif_id in motif_mapping.index:
current_motif_name = motif_mapping.ix[current_motif_id].MOTIF_NAME
for gene_name in set(
map(str.upper,
motif_mapping.ix[current_motif_id].GENES.split(','))):
#specificity of the TF
try:
if USE_ZSCORE:
tf_values = zscore_series(
gene_ranking.ix[gene_name.upper()])
else:
tf_values = (gene_ranking.ix[gene_name.upper(),
target_cell_type] /
gene_ranking.ix[gene_name.upper(),
bg_target_cell_type])
except:
warn(
'The expression values of the gene %s are not present. Skipping it.'
% gene_name.upper())
continue
if USE_ZSCORE:
#correlation
ro = np.corrcoef(tf_values, ds_values)[0, 1]
tf_value = tf_values[target_cell_type]
ds_value = ds_values[target_cell_type]
info(
'Gene:%s TF z-score:%.2f Targets z-score:%.2f Correlation:%.2f'
% (gene_name, tf_value, ds_value, ro))
#make plots
if (tf_value > 0 and np.abs(ro) > 0.3) or plot_all:
x_min = min(-4, tf_values.min() * 1.1)
x_max = max(4, tf_values.max() * 1.1)
y_min = min(-4, ds_values.min() * 1.1)
y_max = max(4, ds_values.max() * 1.1)
fig = plt.figure(figsize=(10, 10),
dpi=80,
facecolor='w',
edgecolor='w')
ax = fig.add_subplot(111)
plt.grid()
plt.plot([x_min, x_max], [0, 0], 'k')
plt.plot([0, 0], [y_min, y_max], 'k')
ax.scatter(tf_values,
ds_values,
s=100,
facecolors='none',
edgecolors='k',
label='rest of cell-types')
ax.hold(True)
ax.plot(tf_values[target_cell_type],
ds_values[target_cell_type],
'*r',
markersize=30,
linestyle='None',
label=target_cell_type)
ax.legend(loc='center',
bbox_to_anchor=(0.5, -0.1),
ncol=3,
fancybox=True,
shadow=True,
numpoints=1)
ax.set_aspect('equal')
plt.text(x_min * 0.98,
y_max * 0.85,
r'$\rho$=%.2f' % ro,
fontsize=14)
plt.xlim(x_min, x_max)
plt.ylim(y_min, y_max)
plt.xlabel('TF z-score', fontsize=16)
plt.ylabel('Targets z-score', fontsize=16)
plt.title(
'Motif: %s (%s) Gene: %s' %
(current_motif_name, current_motif_id, gene_name),
fontsize=17)
plt.savefig(
os.path.join(
output_directory,
'%s_motif_%s(%s)_gene_%s.pdf' %
(target_cell_type,
current_motif_name.replace(
'::', '_'), current_motif_id, gene_name)))
plt.close()
else:
info(
'Gene:%s TF expression ratio:%.2f Targets expression ratio:%.2f'
% (
gene_name,
tf_values,
ds_values,
))
x_min = min(0, tf_values * 1.1)
x_max = max(2, tf_values * 1.1)
y_min = min(0, ds_values * 1.1)
y_max = max(2, ds_values * 1.1)
if (tf_values > 1.2) & ((ds_values > 1.2) |
(ds_values < 0.8)) or plot_all:
fig = plt.figure(figsize=(10, 10),
dpi=80,
facecolor='w',
edgecolor='w')
ax = fig.add_subplot(111)
plt.grid()
plt.plot([x_min, x_max], [1, 1], 'k')
plt.plot([1, 1], [y_min, y_max], 'k')
ax.plot(tf_values,
ds_values,
'*r',
markersize=30,
linestyle='None',
label=target_cell_type)
ax.set_aspect('equal')
plt.xlim(x_min, x_max)
plt.ylim(y_min, y_max)
plt.xlabel('TF expression ratio (%s/%s)' %
(target_cell_type, bg_target_cell_type),
fontsize=16)
plt.ylabel('Average Targets Expression Ratio (%s/%s)' %
(target_cell_type, bg_target_cell_type),
fontsize=16)
plt.title(
'Motif: %s (%s) Gene: %s' %
(current_motif_name, current_motif_id, gene_name),
fontsize=17)
plt.savefig(
os.path.join(
output_directory,
'%s_motif_%s(%s)_gene_%s.pdf' %
(target_cell_type,
current_motif_name.replace(
'::', '_'), current_motif_id, gene_name)))
plt.close()
else:
warn('Sorry the motif %s is not mappable to gene' %
current_motif_id)
info('All done! Ciao!')
sys.exit(0)
def main():
print '\n[H A Y S T A C K T F A C T I V I T Y P L A N E]'
print('\n-TFs Activity on Gene Expression- [Luca Pinello - [email protected]]\n')
print 'Version %s\n' % HAYSTACK_VERSION
#mandatory
parser = argparse.ArgumentParser(description='HAYSTACK Parameters',prog='haystack_tf_activity_plane')
parser.add_argument('haystack_motifs_output_folder', type=str, help='A path to a folder created by the haystack_motifs utility')
parser.add_argument('gene_expression_samples_filename', type=str, help='A file containing the list of sample names and locations')
parser.add_argument('target_cell_type', type=str, help='The sample name to use as a target for the analysis')
#optional
parser.add_argument('--motif_mapping_filename', type=str, help='Custom motif to gene mapping file (the default is for JASPAR CORE 2016 database)')
parser.add_argument('--output_directory',type=str, help='Output directory (default: current directory)')
parser.add_argument('--name', help='Define a custom output filename for the report')
parser.add_argument('--plot_all', help='Disable the filter on the TF activity and correlation (default z-score TF>0 and rho>0.3)',action='store_true')
parser.add_argument('--version',help='Print version and exit.',action='version', version='Version %s' % HAYSTACK_VERSION)
args = parser.parse_args()
args_dict=vars(args)
for key,value in args_dict.items():
exec('%s=%s' %(key,repr(value)))
if not os.path.exists(haystack_motifs_output_folder):
error("The haystack_motifs_output_folder specified: %s doesn't exist!")
sys.exit(1)
check_file(gene_expression_samples_filename)
if motif_mapping_filename:
check_file(motif_mapping_filename)
else:
motif_mapping_filename=os.path.join(determine_path('motif_databases'),'JASPAR_CORE_2016_vertebrates_mapped_to_gene_human_mouse.txt')
if name:
directory_name='HAYSTACK_TFs_ACTIVITY_PLANES_on_'+name
else:
directory_name='HAYSTACK_TFs_ACTIVITY_PLANES_on_'+target_cell_type
if output_directory:
output_directory=os.path.join(output_directory, directory_name)
else:
output_directory=directory_name
motif_mapping=pd.read_table(motif_mapping_filename,header=None,names=['MOTIF_ID','MOTIF_NAME','GENES'],index_col=0)
motif_mapping=motif_mapping.reset_index().groupby('MOTIF_ID').apply(group_motif_mapping)
motif_mapping=motif_mapping.set_index('MOTIF_ID')
#load mapping filename
df_gene_mapping=pd.read_table(FileWrapper("#",gene_expression_samples_filename, "r"),header=None,index_col=0,names=['Sample_name','Sample_file'])
if target_cell_type not in df_gene_mapping.index:
error('\nThe target_cell_type must be among these sample names:\n\n%s' %'\t'.join(df_gene_mapping.index.values))
sys.exit(1)
N_SAMPLES=df_gene_mapping.shape[0]
if N_SAMPLES==1:
error('\nYou need at least gene expression for two cell-types. Exiting...')
sys.exit(1)
elif N_SAMPLES==2:
USE_ZSCORE=False
bg_target_cell_type=list(set(df_gene_mapping.index)-{target_cell_type})[0]
info('Only 2 samples provided, use expression ratio plane instead of z-score. Target:%s, Bg: %s' %(target_cell_type,bg_target_cell_type))
else:
USE_ZSCORE=True
#load gene expression and calculate ranking
gene_values=[]
for sample_name in df_gene_mapping.index:
info('Load gene expression file for :%s' % sample_name)
check_file(df_gene_mapping.ix[sample_name,'Sample_file'])
gene_values.append(pd.read_table(df_gene_mapping.ix[sample_name,'Sample_file'],index_col=0,names=['Gene_Symbol',sample_name]))
gene_values=pd.concat(gene_values,axis=1)
#make names to uppercase! TODO
gene_ranking=gene_values.rank(ascending=True)
#create output folder
if not os.path.exists(output_directory):
os.makedirs(output_directory)
#For each motif make the plots
for motif_gene_filename in glob.glob(os.path.join(haystack_motifs_output_folder,'genes_lists')+'/*.bed'):
current_motif_id=os.path.basename(motif_gene_filename).split('_')[0]
info('Analyzing %s from:%s' %(current_motif_id, motif_gene_filename))
#genes closeby the motif sites
mapped_genes=map(str.upper,list(pd.read_table(motif_gene_filename)['Symbol'].values))
#target genes average activity
if USE_ZSCORE:
ds_values=zscore_series(gene_ranking.ix[mapped_genes,:].mean() )
else:
ds_values=(gene_ranking.ix[mapped_genes,target_cell_type]/gene_ranking.ix[mapped_genes,bg_target_cell_type]).mean()
if current_motif_id in motif_mapping.index:
current_motif_name=motif_mapping.ix[current_motif_id].MOTIF_NAME
for gene_name in set(map(str.upper,motif_mapping.ix[current_motif_id].GENES.split(','))):
#specificity of the TF
try:
if USE_ZSCORE:
tf_values=zscore_series(gene_ranking.ix[gene_name.upper()])
else:
tf_values=(gene_ranking.ix[gene_name.upper(),target_cell_type]/gene_ranking.ix[gene_name.upper(),bg_target_cell_type])
except:
warn('The expression values of the gene %s are not present. Skipping it.' % gene_name.upper())
continue
if USE_ZSCORE:
#correlation
ro=np.corrcoef(tf_values,ds_values)[0,1]
tf_value=tf_values[target_cell_type]
ds_value=ds_values[target_cell_type]
info('Gene:%s TF z-score:%.2f Targets z-score:%.2f Correlation:%.2f' %(gene_name,tf_value,ds_value,ro))
#make plots
if (tf_value>0 and np.abs(ro)>0.3) or plot_all:
x_min=min(-4,tf_values.min()*1.1)
x_max=max(4,tf_values.max()*1.1)
y_min=min(-4,ds_values.min()*1.1)
y_max=max(4,ds_values.max()*1.1)
fig = plt.figure( figsize=(10, 10), dpi=80, facecolor='w', edgecolor='w')
ax = fig.add_subplot(111)
plt.grid()
plt.plot([x_min,x_max],[0,0],'k')
plt.plot([0,0],[y_min,y_max],'k')
ax.scatter(tf_values,ds_values, s=100, facecolors='none', edgecolors='k',label='rest of cell-types')
ax.hold(True)
ax.plot(tf_values[target_cell_type],ds_values[target_cell_type],'*r',markersize=30,linestyle='None',label=target_cell_type)
ax.legend(loc='center', bbox_to_anchor=(0.5, -0.1),ncol=3, fancybox=True, shadow=True,numpoints=1)
ax.set_aspect('equal')
plt.text(x_min*0.98,y_max*0.85,r'$\rho$=%.2f' % ro,fontsize=14)
plt.xlim(x_min,x_max)
plt.ylim(y_min,y_max)
plt.xlabel('TF z-score',fontsize=16)
plt.ylabel('Targets z-score',fontsize=16)
plt.title('Motif: %s (%s) Gene: %s' % (current_motif_name ,current_motif_id ,gene_name),fontsize=17)
plt.savefig(os.path.join(output_directory,'%s_motif_%s(%s)_gene_%s.pdf' % (target_cell_type,current_motif_name.replace('::','_') ,current_motif_id ,gene_name)))
plt.close()
else:
info('Gene:%s TF expression ratio:%.2f Targets expression ratio:%.2f' %(gene_name,tf_values,ds_values,))
x_min=min(0,tf_values*1.1)
x_max=max(2,tf_values*1.1)
y_min=min(0,ds_values*1.1)
y_max=max(2,ds_values*1.1)
if (tf_values>1.2) & ((ds_values>1.2)|(ds_values<0.8)) or plot_all:
fig = plt.figure( figsize=(10, 10), dpi=80, facecolor='w', edgecolor='w')
ax = fig.add_subplot(111)
plt.grid()
plt.plot([x_min,x_max],[1,1],'k')
plt.plot([1,1],[y_min,y_max],'k')
ax.plot(tf_values,ds_values,'*r',markersize=30,linestyle='None',label=target_cell_type)
ax.set_aspect('equal')
plt.xlim(x_min,x_max)
plt.ylim(y_min,y_max)
plt.xlabel('TF expression ratio (%s/%s)' % (target_cell_type,bg_target_cell_type),fontsize=16)
plt.ylabel('Average Targets Expression Ratio (%s/%s)' % (target_cell_type,bg_target_cell_type),fontsize=16)
plt.title('Motif: %s (%s) Gene: %s' % (current_motif_name ,current_motif_id ,gene_name),fontsize=17)
plt.savefig(os.path.join(output_directory,'%s_motif_%s(%s)_gene_%s.pdf' % (target_cell_type,current_motif_name.replace('::','_') ,current_motif_id ,gene_name)))
plt.close()
else:
warn('Sorry the motif %s is not mappable to gene' % current_motif_id)
info('All done! Ciao!')
sys.exit(0)
def create_tiled_genome(genome_name, output_directory, chr_len_filename,
bin_size, chrom_exclude, blacklist):
from re import search
genome_directory = determine_path('genomes')
annotations_directory = determine_path('gene_annotations')
genome_sorted_bins_file = os.path.join(
output_directory,
'%s.%dbp.bins.sorted.bed' % (os.path.basename(genome_name), bin_size))
chr_len_sorted_filtered_filename = os.path.join(
output_directory, "%s_chr_lengths_sorted_filtered.txt" % genome_name)
if not (os.path.exists(genome_sorted_bins_file) and do_not_recompute):
info('Sorting chromosome lengths file once again to double check....')
cmd = ' sort -k1,1 -k2,2n "%s" -o "%s" ' % (chr_len_filename,
chr_len_filename)
sb.call(cmd, shell=True)
info('Creating bins of %dbp in %s' %
(bin_size, genome_sorted_bins_file))
if chrom_exclude:
with open(chr_len_sorted_filtered_filename, 'wb') as f:
f.writelines(line for line in open(chr_len_filename)
if not search(chrom_exclude,
line.split()[0]))
else:
chr_len_sorted_filtered_filename = chr_len_filename
cmd = 'bedtools makewindows -g "%s" -w %s > "%s" ' % (
chr_len_sorted_filtered_filename, bin_size,
genome_sorted_bins_file)
sb.call(cmd, shell=True)
if blacklist == 'none':
info('Tiled genome file created will not be blacklist filtered')
else:
info('Tiled genome file created will be blacklist filtered')
if blacklist == 'hg19':
info('Using hg19 blacklist file %s to filter out the regions' %
blacklist)
blacklist_filepath = os.path.join(
annotations_directory, 'hg19_blacklisted_regions.bed')
check_file(blacklist_filepath)
elif os.path.isfile(blacklist):
info('Using blacklist file %s to filter out the regions' %
blacklist)
blacklist_filepath = blacklist
check_file(blacklist_filepath)
else:
error('Incorrect blacklist option provided. '
'It is neither a file nor a genome')
sys.exit(1)
info('Sort blacklist file')
cmd = ' sort -k1,1 -k2,2n "%s" -o "%s" ' % (blacklist_filepath,
blacklist_filepath)
sb.call(cmd, shell=True)
genome_sorted_bins_filtered_file = genome_sorted_bins_file.replace(
'.bed', '.filtered.bed')
info(' filter out blacklist regions')
cmd = 'bedtools intersect -sorted -a "%s" -b "%s" -v > %s ' % (
genome_sorted_bins_file, blacklist_filepath,
genome_sorted_bins_filtered_file)
sb.call(cmd, shell=True)
if not keep_intermediate_files:
info('Deleting %s' % genome_sorted_bins_file)
try:
os.remove(genome_sorted_bins_file)
except:
pass
genome_sorted_bins_file = genome_sorted_bins_filtered_file
return genome_sorted_bins_file
def main(input_args=None):
print '\n[H A Y S T A C K P I P E L I N E]'
print('\n-SELECTION OF HOTSPOTS OF VARIABILITY AND ENRICHED MOTIFS-\n')
print 'Version %s\n' % HAYSTACK_VERSION
parser = get_args_pipeline()
args = parser.parse_args(input_args)
args_dict = vars(args)
for key, value in args_dict.items():
exec('%s=%s' % (key, repr(value)))
if meme_motifs_filename:
check_file(meme_motifs_filename)
if motif_mapping_filename:
check_file(motif_mapping_filename)
if not os.path.exists(temp_directory):
error(
'The folder specified with --temp_directory: %s does not exist!' %
temp_directory)
sys.exit(1)
if input_is_bigwig:
extension_to_check = '.bw'
info('Input is set BigWig (.bw)')
else:
extension_to_check = '.bam'
info('Input is set compressed SAM (.bam)')
if name:
directory_name = 'HAYSTACK_PIPELINE_RESULTS_on_%s' % name
else:
directory_name = 'HAYSTACK_PIPELINE_RESULTS'
if output_directory:
output_directory = os.path.join(output_directory, directory_name)
else:
output_directory = directory_name
# check folder or sample filename
USE_GENE_EXPRESSION = True
if not os.path.exists(samples_filename_or_bam_folder):
error("The file or folder %s doesn't exist. Exiting." %
samples_filename_or_bam_folder)
sys.exit(1)
if os.path.isfile(samples_filename_or_bam_folder):
BAM_FOLDER = False
data_filenames = []
gene_expression_filenames = []
sample_names = []
with open(samples_filename_or_bam_folder) as infile:
for line in infile:
if not line.strip():
continue
if line.startswith(
'#'): # skip optional header line or empty lines
info('Skipping header/comment line:%s' % line)
continue
fields = line.strip().split()
n_fields = len(fields)
if n_fields == 2:
USE_GENE_EXPRESSION = False
sample_names.append(fields[0])
data_filenames.append(fields[1])
elif n_fields == 3:
USE_GENE_EXPRESSION = USE_GENE_EXPRESSION and True
sample_names.append(fields[0])
data_filenames.append(fields[1])
gene_expression_filenames.append(fields[2])
else:
error('The samples file format is wrong!')
sys.exit(1)
else:
if os.path.exists(samples_filename_or_bam_folder):
BAM_FOLDER = True
USE_GENE_EXPRESSION = False
data_filenames = glob.glob(
os.path.join(samples_filename_or_bam_folder,
'*' + extension_to_check))
if not data_filenames:
error('No bam/bigwig files to analyze in %s. Exiting.' %
samples_filename_or_bam_folder)
sys.exit(1)
sample_names = [
os.path.basename(data_filename).replace(
extension_to_check, '') for data_filename in data_filenames
]
else:
error("The file or folder %s doesn't exist. Exiting." %
samples_filename_or_bam_folder)
sys.exit(1)
# check all the files before starting
info('Checking samples files location...')
for data_filename in data_filenames:
check_file(data_filename)
if USE_GENE_EXPRESSION:
for gene_expression_filename in gene_expression_filenames:
check_file(gene_expression_filename)
if not os.path.exists(output_directory):
os.makedirs(output_directory)
# copy back the file used
if not BAM_FOLDER:
shutil.copy2(samples_filename_or_bam_folder, output_directory)
# write hotspots conf files
sample_names_hotspots_filename = os.path.join(output_directory,
'sample_names_hotspots.txt')
with open(sample_names_hotspots_filename, 'w+') as outfile:
for sample_name, data_filename in zip(sample_names, data_filenames):
outfile.write('%s\t%s\n' % (sample_name, data_filename))
#CALL HAYSTACK HOTSPOTS
cmd_to_run='haystack_hotspots %s %s --output_directory %s --bin_size %d %s %s %s %s %s %s %s %s %s %s %s %s %s %s' % \
(sample_names_hotspots_filename, genome_name,output_directory,bin_size,
('--do_not_filter_bams' if do_not_filter_bams else ''),
('--depleted' if depleted else ''),
('--do_not_recompute' if do_not_recompute else ''),
('--keep_intermediate_files' if keep_intermediate_files else ''),
('--input_is_bigwig' if input_is_bigwig else ''),
('--disable_quantile_normalization' if disable_quantile_normalization else ''),
'--transformation %s' % transformation,
'--chrom_exclude "%s"' % chrom_exclude,
'--z_score_high %f' % z_score_high,
'--z_score_low %f' % z_score_low,
'--th_rpm %f' % th_rpm,
'--blacklist %s' % blacklist,
'--read_ext %d' % read_ext,
'--n_processes %d' % n_processes)
print(cmd_to_run)
sb.call(cmd_to_run, shell=True)
# CALL HAYSTACK MOTIFS
motif_directory = os.path.join(output_directory, 'HAYSTACK_MOTIFS')
for sample_name in sample_names:
specific_regions_filename = os.path.join(
output_directory, 'HAYSTACK_HOTSPOTS', 'SPECIFIC_REGIONS',
'Regions_specific_for_%s*.bed' % sample_name)
bg_regions_filename = glob.glob(
os.path.join(output_directory, 'HAYSTACK_HOTSPOTS',
'SPECIFIC_REGIONS',
'Background_for_%s*.bed' % sample_name))[0]
cmd_to_run = 'haystack_motifs %s %s --bed_bg_filename %s --output_directory %s --name %s' % (
specific_regions_filename, genome_name, bg_regions_filename,
motif_directory, sample_name)
if meme_motifs_filename:
cmd_to_run += ' --meme_motifs_filename %s' % meme_motifs_filename
if n_processes:
cmd_to_run += ' --n_processes %d' % n_processes
if temp_directory:
cmd_to_run += ' --temp_directory %s' % temp_directory
print(cmd_to_run)
sb.call(cmd_to_run, shell=True)
if USE_GENE_EXPRESSION:
sample_names_tf_activity_filename = os.path.join(
output_directory, 'sample_names_tf_activity.txt')
with open(sample_names_tf_activity_filename, 'w+') as outfile:
for sample_name, gene_expression_filename in zip(
sample_names, gene_expression_filenames):
outfile.write('%s\t%s\n' %
(sample_name, gene_expression_filename))
tf_activity_directory = os.path.join(output_directory,
'HAYSTACK_TFs_ACTIVITY_PLANES')
for sample_name in sample_names:
# write tf activity conf files
# CALL HAYSTACK TF ACTIVITY
motifs_output_folder = os.path.join(
motif_directory, 'HAYSTACK_MOTIFS_on_%s' % sample_name)
if os.path.exists(motifs_output_folder):
cmd_to_run = 'haystack_tf_activity_plane %s %s %s --output_directory %s' % (
motifs_output_folder, sample_names_tf_activity_filename,
sample_name, tf_activity_directory)
if motif_mapping_filename:
cmd_to_run += ' --motif_mapping_filename %s' % motif_mapping_filename
if plot_all:
cmd_to_run += ' --plot_all'
if rho_cutoff:
cmd_to_run += ' --rho_cutoff %f' % rho_cutoff
if tf_value_cuttoff:
cmd_to_run += ' --tf_value_cuttoff %f' % tf_value_cuttoff
print(cmd_to_run)
sb.call(cmd_to_run, shell=True)
def main():
print '\n[H A Y S T A C K H O T S P O T]'
print(
'\n-SELECTION OF VARIABLE REGIONS- [Luca Pinello - [email protected]]\n'
)
print 'Version %s\n' % HAYSTACK_VERSION
if which('samtools') is None:
error(
'Haystack requires samtools free available at: http://sourceforge.net/projects/samtools/files/samtools/0.1.19/'
)
sys.exit(1)
if which('bedtools') is None:
error(
'Haystack requires bedtools free available at: https://github.com/arq5x/bedtools2/releases/tag/v2.20.1'
)
sys.exit(1)
if which('bedGraphToBigWig') is None:
info(
'To generate the bigwig files Haystack requires bedGraphToBigWig please download from here: http://hgdownload.cse.ucsc.edu/admin/exe/ and add to your PATH'
)
#mandatory
parser = argparse.ArgumentParser(description='HAYSTACK Parameters')
parser.add_argument(
'samples_filename_or_bam_folder',
type=str,
help=
'A tab delimeted file with in each row (1) a sample name, (2) the path to the corresponding bam filename. Alternatively it is possible to specify a folder containing some .bam files to analyze.'
)
parser.add_argument(
'genome_name',
type=str,
help='Genome assembly to use from UCSC (for example hg19, mm9, etc.)')
#optional
parser.add_argument('--bin_size',
type=int,
help='bin size to use(default: 500bp)',
default=500)
parser.add_argument('--disable_quantile_normalization',
help='Disable quantile normalization (default: False)',
action='store_true')
parser.add_argument(
'--th_rpm',
type=float,
help=
'Percentile on the signal intensity to consider for the hotspots (default: 99)',
default=99)
parser.add_argument(
'--transformation',
type=str,
help=
'Variance stabilizing transformation among: none, log2, angle (default: angle)',
default='angle',
choices=['angle', 'log2', 'none'])
parser.add_argument('--recompute_all',
help='Ignore any file previously precalculated',
action='store_true')
parser.add_argument(
'--z_score_high',
type=float,
help='z-score value to select the specific regions(default: 1.5)',
default=1.5)
parser.add_argument(
'--z_score_low',
type=float,
help='z-score value to select the not specific regions(default: 0.25)',
default=0.25)
parser.add_argument('--name',
help='Define a custom output filename for the report',
default='')
parser.add_argument('--output_directory',
type=str,
help='Output directory (default: current directory)',
default='')
parser.add_argument(
'--use_X_Y',
help=
'Force to process the X and Y chromosomes (default: not processed)',
action='store_true')
parser.add_argument(
'--max_regions_percentage',
type=float,
help=
'Upper bound on the %% of the regions selected (deafult: 0.1, 0.0=0%% 1.0=100%%)',
default=0.1)
parser.add_argument(
'--depleted',
help=
'Look for cell type specific regions with depletion of signal instead of enrichment',
action='store_true')
parser.add_argument(
'--input_is_bigwig',
help=
'Use the bigwig format instead of the bam format for the input. Note: The files must have extension .bw',
action='store_true')
parser.add_argument('--version',
help='Print version and exit.',
action='version',
version='Version %s' % HAYSTACK_VERSION)
args = parser.parse_args()
args_dict = vars(args)
for key, value in args_dict.items():
exec('%s=%s' % (key, repr(value)))
if input_is_bigwig:
extension_to_check = '.bw'
info('Input is set BigWig (.bw)')
else:
extension_to_check = '.bam'
info('Input is set compressed SAM (.bam)')
#check folder or sample filename
if os.path.isfile(samples_filename_or_bam_folder):
BAM_FOLDER = False
bam_filenames = []
sample_names = []
with open(samples_filename_or_bam_folder) as infile:
for line in infile:
if not line.strip():
continue
if line.startswith(
'#'): #skip optional header line or empty lines
info('Skipping header/comment line:%s' % line)
continue
fields = line.strip().split()
n_fields = len(fields)
if n_fields == 2:
sample_names.append(fields[0])
bam_filenames.append(fields[1])
else:
error('The samples file format is wrong!')
sys.exit(1)
else:
if os.path.exists(samples_filename_or_bam_folder):
BAM_FOLDER = True
bam_filenames = glob.glob(
os.path.join(samples_filename_or_bam_folder,
'*' + extension_to_check))
if not bam_filenames:
error('No bam/bigwig files to analyze in %s. Exiting.' %
samples_filename_or_bam_folder)
sys.exit(1)
sample_names = [
os.path.basename(bam_filename).replace(extension_to_check, '')
for bam_filename in bam_filenames
]
else:
error("The file or folder %s doesn't exist. Exiting." %
samples_filename_or_bam_folder)
sys.exit(1)
#check all the files before starting
info('Checking samples files location...')
for bam_filename in bam_filenames:
check_file(bam_filename)
info('Initializing Genome:%s' % genome_name)
genome_directory = determine_path('genomes')
genome_2bit = os.path.join(genome_directory, genome_name + '.2bit')
if os.path.exists(genome_2bit):
genome = Genome_2bit(genome_2bit)
else:
info("\nIt seems you don't have the required genome file.")
if query_yes_no('Should I download it for you?'):
sb.call('haystack_download_genome %s' % genome_name,
shell=True,
env=system_env)
if os.path.exists(genome_2bit):
info('Genome correctly downloaded!')
genome = Genome_2bit(genome_2bit)
else:
error(
'Sorry I cannot download the required file for you. Check your Internet connection.'
)
sys.exit(1)
else:
error(
'Sorry I need the genome file to perform the analysis. Exiting...'
)
sys.exit(1)
chr_len_filename = os.path.join(genome_directory,
"%s_chr_lengths.txt" % genome_name)
check_file(chr_len_filename)
if name:
directory_name = 'HAYSTACK_HOTSPOTS_on_%s' % name
else:
directory_name = 'HAYSTACK_HOTSPOTS'
if output_directory:
output_directory = os.path.join(output_directory, directory_name)
else:
output_directory = directory_name
if not os.path.exists(output_directory):
os.makedirs(output_directory)
genome_sorted_bins_file = os.path.join(
output_directory,
'%s.%dbp.bins.sorted.bed' % (os.path.basename(genome_name), bin_size))
tracks_directory = os.path.join(output_directory, 'TRACKS')
if not os.path.exists(tracks_directory):
os.makedirs(tracks_directory)
intermediate_directory = os.path.join(output_directory, 'INTERMEDIATE')
if not os.path.exists(intermediate_directory):
os.makedirs(intermediate_directory)
if not os.path.exists(genome_sorted_bins_file) or recompute_all:
info('Creating bins of %dbp for %s in %s' %
(bin_size, chr_len_filename, genome_sorted_bins_file))
sb.call(
'bedtools makewindows -g %s -w %s | bedtools sort -i stdin |' %
(chr_len_filename, bin_size) + "perl -nle 'print " + '"$_\t$.";' +
"' /dev/stdin> %s" % genome_sorted_bins_file,
shell=True,
env=system_env)
#convert bam files to genome-wide rpm tracks
for base_name, bam_filename in zip(sample_names, bam_filenames):
info('Processing:%s' % bam_filename)
rpm_filename = os.path.join(tracks_directory,
'%s.bedgraph' % base_name)
sorted_rpm_filename = os.path.join(tracks_directory,
'%s_sorted.bedgraph' % base_name)
mapped_sorted_rpm_filename = os.path.join(
tracks_directory, '%s_mapped_sorted.bedgraph' % base_name)
binned_rpm_filename = os.path.join(
intermediate_directory, '%s.%dbp.rpm' % (base_name, bin_size))
bigwig_filename = os.path.join(tracks_directory, '%s.bw' % base_name)
if input_is_bigwig and which('bigWigAverageOverBed'):
if not os.path.exists(binned_rpm_filename) or recompute_all:
cmd = 'bigWigAverageOverBed %s %s /dev/stdout | sort -s -n -k 1,1 | cut -f5 > %s' % (
bam_filename, genome_sorted_bins_file, binned_rpm_filename)
sb.call(cmd, shell=True, env=system_env)
shutil.copy2(bam_filename, bigwig_filename)
else:
if not os.path.exists(binned_rpm_filename) or recompute_all:
info('Computing Scaling Factor...')
cmd = 'samtools view -c -F 512 %s' % bam_filename
#print cmd
proc = sb.Popen(cmd,
stdout=sb.PIPE,
shell=True,
env=system_env)
(stdout, stderr) = proc.communicate()
#print stdout,stderr
scaling_factor = (1.0 / float(stdout.strip())) * 1000000
info('Scaling Factor: %e' % scaling_factor)
info('Building BedGraph RPM track...')
cmd = 'samtools view -b -F 512 %s | bamToBed | slopBed -r %s -l 0 -s -i stdin -g %s | genomeCoverageBed -g %s -i stdin -bg -scale %.32f > %s' % (
bam_filename, bin_size, chr_len_filename, chr_len_filename,
scaling_factor, rpm_filename)
#print cmd
proc = sb.call(cmd, shell=True, env=system_env)
if which('bedGraphToBigWig'):
if not os.path.exists(bigwig_filename) or recompute_all:
info('Converting BedGraph to BigWig')
cmd = 'bedGraphToBigWig %s %s %s' % (
rpm_filename, chr_len_filename, bigwig_filename)
proc = sb.call(cmd, shell=True, env=system_env)
else:
info(
'Sorry I cannot create the bigwig file.\nPlease download and install bedGraphToBigWig from here: http://hgdownload.cse.ucsc.edu/admin/exe/ and add to your PATH'
)
if not os.path.exists(binned_rpm_filename) or recompute_all:
info('Make constant binned (%dbp) rpm values file' % bin_size)
#cmd='bedtools sort -i %s | bedtools map -a %s -b stdin -c 4 -o mean -null 0.0 | cut -f5 > %s' %(rpm_filename,genome_sorted_bins_file,binned_rpm_filename)
#proc=sb.call(cmd,shell=True,env=system_env)
cmd = 'sort -k1,1 -k2,2n %s > %s' % (rpm_filename,
sorted_rpm_filename)
proc = sb.call(cmd, shell=True, env=system_env)
cmd = 'bedtools map -a %s -b %s -c 4 -o mean -null 0.0 > %s' % (
genome_sorted_bins_file, sorted_rpm_filename,
mapped_sorted_rpm_filename)
proc = sb.call(cmd, shell=True, env=system_env)
cmd = 'cut -f5 %s > %s' % (mapped_sorted_rpm_filename,
binned_rpm_filename)
proc = sb.call(cmd, shell=True, env=system_env)
try:
os.remove(rpm_filename)
os.remove(sorted_rpm_filename)
os.remove(mapped_sorted_rpm_filename)
except:
pass
#load coordinates of bins
coordinates_bin = pd.read_csv(genome_sorted_bins_file,
names=['chr_id', 'bpstart', 'bpend'],
sep='\t',
header=None,
usecols=[0, 1, 2])
N_BINS = coordinates_bin.shape[0]
if not use_X_Y:
coordinates_bin = coordinates_bin.ix[
(coordinates_bin['chr_id'] != 'chrX')
& (coordinates_bin['chr_id'] != 'chrY')]
#load all the tracks
info('Loading the processed tracks')
df_chip = {}
for state_file in glob.glob(os.path.join(intermediate_directory, '*.rpm')):
col_name = os.path.basename(state_file).replace('.rpm', '')
df_chip[col_name] = pd.read_csv(state_file, squeeze=True, header=None)
info('Loading:%s' % col_name)
df_chip = pd.DataFrame(df_chip)
if disable_quantile_normalization:
info('Skipping quantile normalization...')
else:
info('Normalizing the data...')
df_chip = pd.DataFrame(quantile_normalization(df_chip.values),
columns=df_chip.columns,
index=df_chip.index)
if which('bedGraphToBigWig'):
#write quantile normalized tracks
coord_quantile = coordinates_bin.copy()
for col in df_chip:
if disable_quantile_normalization:
normalized_output_filename = os.path.join(
tracks_directory, '%s.bedgraph' % os.path.basename(col))
else:
normalized_output_filename = os.path.join(
tracks_directory,
'%s_quantile_normalized.bedgraph' % os.path.basename(col))
normalized_output_filename_bigwig = normalized_output_filename.replace(
'.bedgraph', '.bw')
if not os.path.exists(
normalized_output_filename_bigwig) or recompute_all:
info('Writing binned track: %s' %
normalized_output_filename_bigwig)
coord_quantile['rpm_normalized'] = df_chip.ix[:, col]
coord_quantile.dropna().to_csv(normalized_output_filename,
sep='\t',
header=False,
index=False)
cmd = 'bedGraphToBigWig %s %s %s' % (
normalized_output_filename, chr_len_filename,
normalized_output_filename_bigwig)
proc = sb.call(cmd, shell=True, env=system_env)
try:
os.remove(normalized_output_filename)
except:
pass
else:
info(
'Sorry I cannot creat the bigwig file.\nPlease download and install bedGraphToBigWig from here: http://hgdownload.cse.ucsc.edu/admin/exe/ and add to your PATH'
)
#th_rpm=np.min(df_chip.apply(lambda x: np.percentile(x,th_rpm)))
th_rpm = find_th_rpm(df_chip, th_rpm)
info('Estimated th_rpm:%s' % th_rpm)
df_chip_not_empty = df_chip.ix[(df_chip > th_rpm).any(1), :]
if transformation == 'log2':
df_chip_not_empty = df_chip_not_empty.applymap(log2_transform)
info('Using log2 transformation')
elif transformation == 'angle':
df_chip_not_empty = df_chip_not_empty.applymap(angle_transform)
info('Using angle transformation')
else:
info('Using no transformation')
iod_values = df_chip_not_empty.var(1) / df_chip_not_empty.mean(1)
####calculate the inflation point a la superenhancers
scores = iod_values
min_s = np.min(scores)
max_s = np.max(scores)
N_POINTS = len(scores)
x = np.linspace(0, 1, N_POINTS)
y = sorted((scores - min_s) / (max_s - min_s))
m = smooth((np.diff(y) / np.diff(x)), 50)
m = m - 1
m[m <= 0] = np.inf
m[:int(len(m) * (1 - max_regions_percentage))] = np.inf
idx_th = np.argmin(m) + 1
#print idx_th,
th_iod = sorted(iod_values)[idx_th]
#print th_iod
hpr_idxs = iod_values > th_iod
#print len(iod_values),len(hpr_idxs),sum(hpr_idxs), sum(hpr_idxs)/float(len(hpr_idxs)),
info('Selected %f%% regions (%d)' %
(sum(hpr_idxs) / float(len(hpr_idxs)) * 100, sum(hpr_idxs)))
coordinates_bin['iod'] = iod_values
#we remove the regions "without" signal in any of the cell types
coordinates_bin.dropna(inplace=True)
#create a track for IGV
bedgraph_iod_track_filename = os.path.join(tracks_directory,
'VARIABILITY.bedgraph')
bw_iod_track_filename = os.path.join(tracks_directory, 'VARIABILITY.bw')
if not os.path.exists(bw_iod_track_filename) or recompute_all:
info('Generating variability track in bigwig format in:%s' %
bw_iod_track_filename)
coordinates_bin.to_csv(bedgraph_iod_track_filename,
sep='\t',
header=False,
index=False)
sb.call('bedGraphToBigWig %s %s %s' %
(bedgraph_iod_track_filename, chr_len_filename,
bw_iod_track_filename),
shell=True,
env=system_env)
try:
os.remove(bedgraph_iod_track_filename)
except:
pass
#Write the HPRs
bedgraph_hpr_filename = os.path.join(
tracks_directory, 'SELECTED_VARIABILITY_HOTSPOT.bedgraph')
to_write = coordinates_bin.ix[hpr_idxs[hpr_idxs].index]
to_write.dropna(inplace=True)
to_write['bpstart'] = to_write['bpstart'].astype(int)
to_write['bpend'] = to_write['bpend'].astype(int)
to_write.to_csv(bedgraph_hpr_filename, sep='\t', header=False, index=False)
bed_hpr_fileaname = os.path.join(output_directory,
'SELECTED_VARIABILITY_HOTSPOT.bed')
if not os.path.exists(bed_hpr_fileaname) or recompute_all:
info('Writing the HPRs in: %s' % bed_hpr_fileaname)
sb.call('sort -k1,1 -k2,2n %s | bedtools merge -i stdin > %s' %
(bedgraph_hpr_filename, bed_hpr_fileaname),
shell=True,
env=system_env)
#os.remove(bedgraph_hpr_filename)
df_chip_hpr = df_chip_not_empty.ix[hpr_idxs, :]
df_chip_hpr_zscore = df_chip_hpr.apply(zscore, axis=1)
specific_regions_directory = os.path.join(output_directory,
'SPECIFIC_REGIONS')
if not os.path.exists(specific_regions_directory):
os.makedirs(specific_regions_directory)
if depleted:
z_score_high = -z_score_high
z_score_low = -z_score_low
#write target
info('Writing Specific Regions for each cell line...')
coord_zscore = coordinates_bin.copy()
for col in df_chip_hpr_zscore:
regions_specific_filename = 'Regions_specific_for_%s_z_%.2f.bedgraph' % (
os.path.basename(col).replace('.rpm', ''), z_score_high)
specific_output_filename = os.path.join(specific_regions_directory,
regions_specific_filename)
specific_output_bed_filename = specific_output_filename.replace(
'.bedgraph', '.bed')
if not os.path.exists(specific_output_bed_filename) or recompute_all:
if depleted:
coord_zscore['z-score'] = df_chip_hpr_zscore.ix[
df_chip_hpr_zscore.ix[:, col] < z_score_high, col]
else:
coord_zscore['z-score'] = df_chip_hpr_zscore.ix[
df_chip_hpr_zscore.ix[:, col] > z_score_high, col]
coord_zscore.dropna().to_csv(specific_output_filename,
sep='\t',
header=False,
index=False)
info('Writing:%s' % specific_output_bed_filename)
sb.call('sort -k1,1 -k2,2n %s | bedtools merge -i stdin > %s' %
(specific_output_filename, specific_output_bed_filename),
shell=True,
env=system_env)
#write background
info('Writing Background Regions for each cell line...')
coord_zscore = coordinates_bin.copy()
for col in df_chip_hpr_zscore:
regions_bg_filename = 'Background_for_%s_z_%.2f.bedgraph' % (
os.path.basename(col).replace('.rpm', ''), z_score_low)
bg_output_filename = os.path.join(
specific_regions_directory, 'Background_for_%s_z_%.2f.bedgraph' %
(os.path.basename(col).replace('.rpm', ''), z_score_low))
bg_output_bed_filename = bg_output_filename.replace(
'.bedgraph', '.bed')
if not os.path.exists(bg_output_bed_filename) or recompute_all:
if depleted:
coord_zscore['z-score'] = df_chip_hpr_zscore.ix[
df_chip_hpr_zscore.ix[:, col] > z_score_low, col]
else:
coord_zscore['z-score'] = df_chip_hpr_zscore.ix[
df_chip_hpr_zscore.ix[:, col] < z_score_low, col]
coord_zscore.dropna().to_csv(bg_output_filename,
sep='\t',
header=False,
index=False)
info('Writing:%s' % bg_output_bed_filename)
sb.call('sort -k1,1 -k2,2n -i %s | bedtools merge -i stdin > %s' %
(bg_output_filename, bg_output_bed_filename),
shell=True,
env=system_env)
###plot selection
pl.figure()
pl.title('Selection of the HPRs')
pl.plot(x, y, 'r', lw=3)
pl.plot(x[idx_th], y[idx_th], '*', markersize=20)
pl.hold(True)
x_ext = np.linspace(-0.1, 1.2, N_POINTS)
y_line = (m[idx_th] + 1.0) * (x_ext - x[idx_th]) + y[idx_th]
pl.plot(x_ext, y_line, '--k', lw=3)
pl.xlim(0, 1.1)
pl.ylim(0, 1)
pl.xlabel('Fraction of bins')
pl.ylabel('Score normalized')
pl.savefig(
os.path.join(output_directory, 'SELECTION_OF_VARIABILITY_HOTSPOT.pdf'))
pl.close()
igv_session_filename = os.path.join(output_directory,
'OPEN_ME_WITH_IGV.xml')
info('Creating an IGV session file (.xml) in: %s' % igv_session_filename)
session = ET.Element("Session")
session.set("genome", genome_name)
session.set("hasGeneTrack", "true")
session.set("version", "7")
resources = ET.SubElement(session, "Resources")
panel = ET.SubElement(session, "Panel")
resource_items = []
track_items = []
hpr_iod_scores = scores[scores > th_iod]
min_h = np.mean(hpr_iod_scores) - 2 * np.std(hpr_iod_scores)
max_h = np.mean(hpr_iod_scores) + 2 * np.std(hpr_iod_scores)
mid_h = np.mean(hpr_iod_scores)
#write the tracks
for sample_name in sample_names:
if disable_quantile_normalization:
track_full_path = os.path.join(
output_directory, 'TRACKS',
'%s.%dbp.bw' % (sample_name, bin_size))
else:
track_full_path = os.path.join(
output_directory, 'TRACKS',
'%s.%dbp_quantile_normalized.bw' % (sample_name, bin_size))
track_filename = rem_base_path(track_full_path, output_directory)
if os.path.exists(track_full_path):
resource_items.append(ET.SubElement(resources, "Resource"))
resource_items[-1].set("path", track_filename)
track_items.append(ET.SubElement(panel, "Track"))
track_items[-1].set('color', "0,0,178")
track_items[-1].set('id', track_filename)
track_items[-1].set("name", sample_name)
resource_items.append(ET.SubElement(resources, "Resource"))
resource_items[-1].set(
"path", rem_base_path(bw_iod_track_filename, output_directory))
track_items.append(ET.SubElement(panel, "Track"))
track_items[-1].set('color', "178,0,0")
track_items[-1].set('id',
rem_base_path(bw_iod_track_filename, output_directory))
track_items[-1].set('renderer', "HEATMAP")
track_items[-1].set(
"colorScale",
"ContinuousColorScale;%e;%e;%e;%e;0,153,255;255,255,51;204,0,0" %
(mid_h, min_h, mid_h, max_h))
track_items[-1].set("name", 'VARIABILITY')
resource_items.append(ET.SubElement(resources, "Resource"))
resource_items[-1].set("path",
rem_base_path(bed_hpr_fileaname, output_directory))
track_items.append(ET.SubElement(panel, "Track"))
track_items[-1].set('color', "178,0,0")
track_items[-1].set('id', rem_base_path(bed_hpr_fileaname,
output_directory))
track_items[-1].set('renderer', "HEATMAP")
track_items[-1].set(
"colorScale",
"ContinuousColorScale;%e;%e;%e;%e;0,153,255;255,255,51;204,0,0" %
(mid_h, min_h, mid_h, max_h))
track_items[-1].set("name", 'HOTSPOTS')
for sample_name in sample_names:
track_full_path = glob.glob(
os.path.join(output_directory, 'SPECIFIC_REGIONS',
'Regions_specific_for_%s*.bedgraph' % sample_name))[0]
specific_track_filename = rem_base_path(track_full_path,
output_directory)
if os.path.exists(track_full_path):
resource_items.append(ET.SubElement(resources, "Resource"))
resource_items[-1].set("path", specific_track_filename)
track_items.append(ET.SubElement(panel, "Track"))
track_items[-1].set('color', "178,0,0")
track_items[-1].set('id', specific_track_filename)
track_items[-1].set('renderer', "HEATMAP")
track_items[-1].set(
"colorScale",
"ContinuousColorScale;%e;%e;%e;%e;0,153,255;255,255,51;204,0,0"
% (mid_h, min_h, mid_h, max_h))
track_items[-1].set("name", 'REGION SPECIFIC FOR %s' % sample_name)
tree = ET.ElementTree(session)
tree.write(igv_session_filename, xml_declaration=True)
info('All done! Ciao!')
sys.exit(0)