def select_by_max_exon_nb(inputfile=None, outputfile=None):
"""
Select transcripts based on the number of exons.
"""
msg = "Selecting transcript with the highest number of exon for each gene."
message(msg)
gtf = GTF(inputfile, check_ensembl_format=False).select_by_max_exon_nb()
gtf.write(outputfile, gc_off=True)
def select_most_5p_tx(inputfile=None, outputfile=None, keep_gene_lines=False):
"""
Select the most 5' transcript of each gene.
"""
message("Selecting the most 5' transcript of each gene.")
gtf = GTF(inputfile)
if keep_gene_lines:
gtf = gtf.select_5p_transcript()
else:
gtf = gtf.select_5p_transcript().select_by_key("feature", "gene", 1)
gtf.write(outputfile, gc_off=True)
def select_by_nb_exon(inputfile=None,
outputfile=None,
min_exon_number=None,
max_exon_number=None):
"""
Select transcripts based on the number of exons.
"""
msg = "Selecting transcript by exon number (range: [{m},{M}])"
msg = msg.format(m=str(min_exon_number), M=str(max_exon_number))
message(msg)
gtf = GTF(inputfile, check_ensembl_format=False).select_by_number_of_exons(
min_exon_number, max_exon_number)
gtf.write(outputfile, gc_off=True)
close_properly(outputfile, inputfile)
def exon_sizes(inputfile=None, outputfile=None, key_name=None):
"""
Add a new key to transcript features containing a comma-separated list of exon-size.
"""
gtf = GTF(inputfile)
all_tx_ids = gtf.get_tx_ids(nr=True)
tx_to_size_list = dict()
exons_starts = gtf.select_by_key("feature", "exon").extract_data(
"transcript_id,start",
as_dict_of_merged_list=True,
no_na=True,
nr=False)
if not len(exons_starts):
message("No exon found.", type="ERROR")
exons_ends = gtf.select_by_key("feature", "exon").extract_data(
"transcript_id,end", as_dict_of_merged_list=True, no_na=True, nr=False)
strands = gtf.select_by_key("feature", "transcript").extract_data(
"transcript_id,strand",
as_dict_of_values=True,
no_na=True,
nr=True,
hide_undef=True)
for tx_id in all_tx_ids:
size_list = []
for s, e in zip(exons_starts[tx_id], exons_ends[tx_id]):
size = str(int(e) - int(s) + 1)
size_list += [size]
if strands[tx_id] == "-":
size_list = reversed(size_list)
tx_to_size_list[tx_id] = ",".join(size_list)
if len(tx_to_size_list):
gtf = gtf.add_attr_from_dict(feat="transcript",
key="transcript_id",
a_dict=tx_to_size_list,
new_key=key_name)
gtf.write(outputfile, gc_off=True)
close_properly(outputfile, inputfile)
def intron_sizes(
inputfile=None,
outputfile=None,
key_name=None):
"""
Add a new key to transcript features containing a comma-separated list of intron sizes.
"""
gtf = GTF(inputfile, check_ensembl_format=False)
all_tx_ids = gtf.get_tx_ids(nr=True)
intron_bo = gtf.get_introns(by_transcript=True,
name=["transcript_id"],
intron_nb_in_name=False,
feat_name=False)
strands = gtf.select_by_key("feature",
"transcript").extract_data("transcript_id,strand",
as_dict_of_values=True,
no_na=True,
nr=True,
hide_undef=True)
intron_size = {tx: [] for tx in all_tx_ids}
for bed_line in intron_bo:
intron_size[bed_line.name] += [str(bed_line.end - bed_line.start)]
for tx_id in intron_size:
if len(intron_size[tx_id]):
if strands[tx_id] == "-":
intron_size[tx_id] = ",".join(reversed(intron_size[tx_id]))
else:
intron_size[tx_id] = ",".join(intron_size[tx_id])
else:
intron_size[tx_id] = "0"
if len(intron_size):
gtf = gtf.add_attr_from_dict(feat="transcript",
key="transcript_id",
a_dict=intron_size,
new_key=key_name)
gtf.write(outputfile,
gc_off=True)
close_properly(outputfile, inputfile)
def short_long(inputfile=None,
outputfile=None,
longs=None,
keep_gene_lines=False):
""" Select the shortest transcript for each gene, Or the longuest if the \
-l arguments is used. """
gtf = GTF(inputfile, check_ensembl_format=False)
if longs:
gtf = gtf.select_longuest_transcripts()
else:
gtf = gtf.select_shortest_transcripts()
if not keep_gene_lines:
gtf = gtf.select_by_key("feature", "gene", 1)
gtf.write(outputfile,
gc_off=True)
def join_multi_file(inputfile=None,
outputfile=None,
target_feature=None,
key_to_join=None,
matrix_files=()):
"""
Join attributes from a set of tabulated files.
"""
# -----------------------------------------------------------
# load the GTF
# -----------------------------------------------------------
gtf = GTF(inputfile, check_ensembl_format=False)
# -----------------------------------------------------------
# Check target feature
# -----------------------------------------------------------
feat_list = gtf.get_feature_list(nr=True)
if target_feature is not None:
target_feature_list = target_feature.split(",")
for i in target_feature_list:
if i not in feat_list + ["*"]:
message("Feature " + i + " not found.", type="ERROR")
else:
target_feature = ",".join(feat_list)
# -----------------------------------------------------------
# Do it
# -----------------------------------------------------------
for join_file in matrix_files:
gtf = gtf.add_attr_from_matrix_file(feat=target_feature,
key=key_to_join,
inputfile=join_file.name)
gtf.write(outputfile, gc_off=True)
gc.disable()
close_properly(outputfile, inputfile)
def nb_exons(inputfile=None,
outputfile=None,
key_name=None,
text_format=False):
"""
Count the number of exons in the gtf file.
"""
gtf = GTF(inputfile)
n_exons = defaultdict(int)
# -------------------------------------------------------------------------
# Computing number of exon for each transcript in input GTF file
#
# -------------------------------------------------------------------------
message("Computing number of exons for each transcript in input GTF file.")
exon = gtf.select_by_key("feature", "exon")
fields = exon.extract_data("transcript_id")
for i in fields:
tx_id = i[0]
n_exons[tx_id] += 1
if text_format:
for tx_id in n_exons:
outputfile.write(tx_id + "\t" + str(n_exons[tx_id]) +
"\ttranscript\n")
else:
if len(n_exons):
gtf = gtf.add_attr_from_dict(feat="transcript",
key="transcript_id",
a_dict=n_exons,
new_key=key_name)
gtf.write(outputfile, gc_off=True)
close_properly(outputfile, inputfile)
def overlapping(
inputfile=None,
outputfile=None,
key_name=None,
upstream=1500,
downstream=1500,
chrom_info=None,
feature_type='transcript',
same_strandedness=False,
diff_strandedness=False,
annotate_gtf=False,
bool=False,
annotate_all=False,
invert_match=False):
"""
Description: Find transcripts whose body/TSS/TTS do or do not overlap with any
transcript from another gene.
"""
# ----------------------------------------------------------------------
# Prepare key names
# ----------------------------------------------------------------------
if annotate_gtf:
if key_name is None:
key_info = ["overlap",
feature_type,
"u" + str(upstream / 1000) + "k",
"d" + str(downstream / 1000) + "k"
]
key_name = "_".join(key_info)
if invert_match:
message("--annotate-gtf and --invert-match are "
"mutually exclusive.",
type="ERROR")
if same_strandedness and diff_strandedness:
message("--same-strandedness and --diff-strandedness are "
"mutually exclusive.",
type="ERROR")
message("Using -u " + str(upstream))
message("Using -d " + str(downstream))
overlapping_tx = defaultdict(list)
# Load the GTF so that it won't be lost
# if GTF stream comes from stdin
gtf = GTF(inputfile)
message("Getting transcript in bed format")
tx_feat = gtf.select_by_key("feature",
"transcript")
if annotate_all:
overlapping_tx = gtf.extract_data(keys=["transcript_id"], as_dict=True, default_val="0")
for i in overlapping_tx:
overlapping_tx[i] = []
# ----------------------------------------------------------------------
# Get transcript limits
# ----------------------------------------------------------------------
tx_bed = tx_feat.to_bed(name=["transcript_id", "gene_id"], sep="||")
message("Getting " + feature_type + " and 'slopping'.")
if feature_type == "transcript":
bed_obj = tx_bed.slop(s=True,
l=upstream,
r=downstream,
g=chrom_info.name).cut([0, 1, 2, 3, 4, 5])
elif feature_type == "promoter":
bed_obj = tx_feat.get_tss(name=["transcript_id", "gene_id"],
sep="||").slop(s=True,
l=upstream,
r=downstream,
g=chrom_info.name).cut([0, 1,
2, 3,
4, 5])
elif feature_type == "tts":
bed_obj = tx_feat.get_tts(name=["transcript_id", "gene_id"],
sep="||").slop(s=True,
l=upstream,
r=downstream,
g=chrom_info.name).cut([0, 1,
2, 3,
4, 5])
else:
message("Not implemented yet", type="ERROR")
tmp_file = make_tmp_file(feature_type + "_slopped_region", ".bed")
bed_obj.saveas(tmp_file.name)
overlap_regions = bed_obj.intersect(tx_bed,
wb=True,
s=same_strandedness,
S=diff_strandedness)
tmp_file = make_tmp_file(feature_type + "_overlapping_regions", ".bed")
overlap_regions.saveas(tmp_file.name)
for i in overlap_regions:
tx_other, gn_other = i.fields[9].split("||")
tx_id, gene_id = i.fields[3].split("||")
if gene_id != gn_other:
overlapping_tx[tx_id] += [tx_other]
if bool:
for k, _ in overlapping_tx.items():
if not len(overlapping_tx[k]):
overlapping_tx[k] = "0"
else:
overlapping_tx[k] = "1"
if not invert_match:
if not annotate_gtf:
value = ",".join(set(overlapping_tx.keys()))
gtf.select_by_key("transcript_id",
value).write(outputfile,
gc_off=True)
else:
if len(overlapping_tx):
gtf = gtf.add_attr_from_dict(feat="transcript",
key="transcript_id",
a_dict=overlapping_tx,
new_key=key_name)
gtf.write(outputfile,
gc_off=True)
else:
values = ",".join(set(overlapping_tx.keys()))
gtf.select_by_key("transcript_id",
values,
invert_match).write(outputfile, gc_off=True)
gc.disable()
close_properly(outputfile, inputfile)
def feature_size(inputfile=None,
outputfile=None,
ft_type="transcript",
names="transcript_id",
key_name='feature_size',
separator="|",
bed=False):
"""
Get the size and limits (start/end) of features enclosed in the GTF. If bed
format is requested returns the limits zero-based half open and the size as a score.
Otherwise output GTF file with 'feat_size' as a new key and size as value.
"""
message("Computing feature sizes.")
gtf = GTF(inputfile)
feat_list = gtf.get_feature_list(nr=True) + ['mature_rna']
if ft_type not in feat_list + ["*"]:
message("Unable to find requested feature.", type="ERROR")
names = names.split(",")
if ft_type != 'mature_rna':
if bed:
bed_obj = gtf.select_by_key("feature",
ft_type).to_bed(name=names,
sep=separator,
add_feature_type=True)
for i in bed_obj:
i.score = str(i.end - i.start)
write_properly(chomp(str(i)), outputfile)
else:
tmp_file = make_tmp_file(prefix="feature_size", suffix=".txt")
elmt = gtf.extract_data("feature,start,end",
as_list_of_list=True,
no_na=False,
hide_undef=False)
for i in elmt:
if i[0] != ft_type and ft_type != "*":
tmp_file.write("?\n")
else:
tmp_file.write(str(int(i[2]) - int(i[1]) + 1) + "\n")
tmp_file.close()
gtf.add_attr_column(tmp_file, key_name).write(outputfile,
gc_off=True)
else:
tx_size = gtf.get_transcript_size()
if bed:
bed_obj = gtf.select_by_key("feature", 'transcript').to_bed(
['transcript_id'] + names,
add_feature_type=False,
sep=separator,
more_name=['mature_rna'])
for i in bed_obj:
names = i.name.split(separator)
tx_id = names.pop(0)
i.score = tx_size[tx_id]
i.name = separator.join(names)
write_properly(chomp(str(i)), outputfile)
else:
if len(tx_size):
gtf = gtf.add_attr_from_dict(feat="transcript",
key="transcript_id",
a_dict=tx_size,
new_key=key_name)
gtf.write(outputfile, gc_off=True)
close_properly(outputfile, inputfile)
def retrieve(species_name='homo_sapiens',
outputfile=None,
release=None,
to_stdout=False,
list_only=False,
delete=False,
hide_species_name=None,
ensembl_collection='vertebrate'):
"""Retrieve a GTF file from ensembl.
:Example:
>>> # retrieve("Xenopus_tropicalis")
"""
if outputfile is None:
outputdir = os.getcwd()
else:
outputdir = os.path.dirname(os.path.abspath(outputfile.name))
if species_name is None and not list_only:
message("Choose --species-name or --list-only.", type='ERROR')
if outputfile is not None:
if not os.path.exists(
os.path.dirname(os.path.abspath(outputfile.name))):
message("Output directory does not exists. Exiting.", type='ERROR')
else:
if os.path.isdir(outputfile.name):
message("Output file is a directory !.", type='ERROR')
# Will contain the url pointing to the
# requested gtf.
target_gtf = None
# -------------------------------------------------------------------------
# Check ensembl repository
# -------------------------------------------------------------------------
if ensembl_collection == 'vertebrate':
host = "ftp.ensembl.org"
user = "******" # votre identifiant
password = "******"
elif ensembl_collection in ['protists', 'fungi', 'plants', 'metazoa']:
host = "ftp.ensemblgenomes.org"
user = "******"
password = "******"
try:
message("Trying to connect")
ftp = ftputil.FTPHost(host, user, password)
if pygtftk.utils.VERBOSITY:
message("Connected to ensembl FTP website.")
except FTPOSError as err:
message(str(err))
message("Unable to connect (FTPOSError).", type="ERROR")
message("Connection successful.")
try:
ftp.chdir('/pub')
message("Successfully change directory to pub")
except:
message("Unable to change directory to 'pub'.",
type="ERROR")
if ensembl_collection in ['protists', 'fungi', 'plants', 'metazoa']:
try:
ftp.chdir(ensembl_collection)
message("Successfully change directory to " + ensembl_collection)
except:
message("Unable to change directory to '%s'." % ensembl_collection,
type="ERROR")
try:
all_releases = ftp.listdir(ftp.curdir)
except Exception as e:
print(str(e))
message("Unable to list directory.",
type="ERROR")
if release is not None:
release_dir = "release-" + release
if release_dir not in all_releases:
message("This release number could not be found. Aborting",
type="ERROR")
else:
version_list = []
for ver in all_releases:
regexp = re.compile("release-(\d+)")
hit = regexp.search(ver)
if hit:
version_list += [int(hit.group(1))]
release = max(version_list)
release_dir = "release-" + str(release)
message("Latest version is %d." % release)
try:
ftp.chdir(release_dir)
message("Changed release directory: %s" % release_dir,
type="DEBUG")
except:
message("Unable to change directory to '%s'." % release_dir,
type="ERROR")
ftp.chdir('gtf')
try:
all_species = ftp.listdir(ftp.curdir)
all_species = [x for x in all_species if ftp.path.isdir(x)]
except:
message("Unable to list directory.",
type="ERROR")
if list_only:
species_list = []
url_list = []
for sp in all_species:
gtfs = [x for x in ftp.listdir(sp) if x.endswith('.gtf.gz')]
for gtf in gtfs:
species_list += [sp]
current_url = 'ftp://' + host + ftp.getcwd() + '/'
url_list += [current_url + sp + "/" + gtf]
for sp, url in zip(species_list, url_list):
if hide_species_name:
print(url)
else:
print(sp.ljust(50) + url)
sys.exit()
else:
if species_name not in all_species:
message("Species could not be found for release: %s" % str(release))
message("Trying species name in lower case.")
species_name = species_name.lower()
if species_name not in all_species:
message("Species could not be found for release: %s" % str(release),
type="ERROR")
ftp.chdir(species_name)
gtf_list = ftp.listdir(ftp.curdir)
# choice 1 (only regular chromosome)
gtf_sub = [x for x in gtf_list if x.endswith("chr.gtf.gz")]
# choice 2 should be ! choice 1 and ! 'ab_initio'.
# Should be default gtf
gtf_sub_2 = [x for x in gtf_list if "abinitio.gtf.gz" not in x]
gtf_sub_2 = [x for x in gtf_sub_2 if x.endswith(".gtf.gz")]
if gtf_sub:
gtf_sub_2.remove(gtf_sub[0])
# Choice 3 abinitio
gtf_sub_3 = [x for x in gtf_list if x.endswith("abinitio.gtf.gz")]
# Choice 4:
# Any gtf
if len(gtf_sub) > 0:
target_gtf = gtf_sub[0]
elif len(gtf_sub_2) > 0:
target_gtf = gtf_sub_2[0]
elif len(gtf_sub_3) > 0:
target_gtf = gtf_sub_3[0]
else:
gtf_sub = [x for x in gtf_list if x.endswith(".gtf.gz")]
target_gtf = gtf_sub[0]
# -------------------------------------------------------------------------
# Download if requested
# -------------------------------------------------------------------------
if target_gtf is not None:
if not list_only:
message("Downloading GTF file : " + target_gtf)
ftp.download(target_gtf,
target_gtf)
os.rename(target_gtf, os.path.join(outputdir, target_gtf))
if to_stdout:
gtf = GTF(os.path.join(outputdir, target_gtf),
check_ensembl_format=False)
gtf.write("-", gc_off=True)
if delete:
os.remove(os.path.join(outputdir, target_gtf))
else:
if outputfile is not None:
message("Renaming.")
os.rename(os.path.join(outputdir, target_gtf),
outputfile.name)
else:
message("Species could not be found for release: " + release,
type='ERROR')
gc.disable()
def select_by_intron_size(inputfile=None,
outputfile=None,
intron_size=0,
merged=False,
invert_match=False,
delete_monoexonic=False,
add_intron_size=False):
"""
Select genes which contain an intron of size at least s or whose sum of intron size is at least s
"""
message("Searching for intronic regions.")
gtf = GTF(inputfile, check_ensembl_format=False)
introns_bo = gtf.get_introns(by_transcript=True,
name=["transcript_id"],
intron_nb_in_name=False).sort()
# Get the list of transcripts
all_tx_ids = gtf.get_tx_ids(nr=True)
# The list of transcripts
# to be deleted
to_delete = OrderedDict()
if merged:
# Create a dict that will contain the sum of introns for
# each transcript
intron_sum_dict = OrderedDict.fromkeys(all_tx_ids, 0)
for i in introns_bo:
size = i.end - i.start
tx_id = i.name
intron_sum_dict[tx_id] += size
for tx_id, sum_intron in list(intron_sum_dict.items()):
if sum_intron != 0:
if not invert_match:
if sum_intron < intron_size:
to_delete[tx_id] = 1
else:
if sum_intron >= intron_size:
to_delete[tx_id] = 1
else:
if delete_monoexonic:
to_delete[tx_id] = 1
if add_intron_size:
gtf = gtf.add_attr_from_dict(feat="transcript",
key="transcript_id",
a_dict=intron_sum_dict,
new_key="intron_size_sum")
else:
# Create a dict that will contain a list introns size
# for each transcript
intron_size_dict = defaultdict(list)
for tx_id in all_tx_ids:
intron_size_dict[tx_id] = []
for i in introns_bo:
size = i.end - i.start
tx_id = i.name
intron_size_dict[tx_id] += [size]
for tx_id, list_size in list(intron_size_dict.items()):
if not list_size:
intron_size_dict[tx_id] = [0]
if delete_monoexonic:
to_delete[tx_id] = 1
continue
for size in intron_size_dict[tx_id]:
if not invert_match:
if size < intron_size:
to_delete[tx_id] = 1
else:
if size >= intron_size:
to_delete[tx_id] = 1
if add_intron_size:
for tx_id, list_size in list(intron_size_dict.items()):
list_size = [str(x) for x in list_size]
intron_size_dict[tx_id] = ",".join(list_size)
gtf = gtf.add_attr_from_dict(feat="transcript",
key="transcript_id",
a_dict=intron_size_dict,
new_key="intron_size")
all_tx_ids = gtf.get_tx_ids(nr=True)
all_tx_ids = [x for x in all_tx_ids if x not in to_delete]
msg_list = ",".join(list(to_delete.keys()))
nb_char = min([len(msg_list), 40])
msg_list = msg_list[0:nb_char]
message("Deleting: " + msg_list + "...")
gtf = gtf.select_by_key("transcript_id", ",".join(all_tx_ids))
gtf.write(outputfile, gc_off=True)
close_properly(outputfile, inputfile)
def select_by_key(inputfile=None,
outputfile=None,
key=None,
value=None,
invert_match=False,
file_with_values=None,
col=0,
select_transcripts=False,
select_genes=False,
select_exons=False,
select_cds=False,
select_start_codon=False,
bed_format=False,
log=False,
separator="|",
names="transcript_id"):
"""Select lines from a GTF file based on attributes and
associated values.
"""
# ----------------------------------------------------------------------
# Check mode
# ----------------------------------------------------------------------
if select_transcripts:
key = "feature"
value = "transcript"
elif select_cds:
key = "feature"
value = "CDS"
elif select_start_codon:
key = "feature"
value = "start_codon"
elif select_genes:
key = "feature"
value = "gene"
elif select_exons:
key = "feature"
value = "exon"
elif file_with_values is None:
if key is None or value is None:
message(
"Key and value are mandatory. Alternatively use -e/t/g/f or -f with -k.",
type="ERROR")
elif file_with_values is not None:
if key is None:
message("Please set -k.", type="ERROR")
if value is not None:
message("The -f and -v arguments are mutually exclusive.",
type="ERROR")
# ----------------------------------------------------------------------
# Load file with value
# ----------------------------------------------------------------------
gtf = GTF(inputfile, check_ensembl_format=False)
all_values = gtf.extract_data(key, as_list=True, no_na=True, nr=True)
if log:
feat_before = len(gtf)
if not file_with_values:
value_list = value.split(",")
gtf = gtf.select_by_key(key, value, invert_match)
else:
value_list = []
for line in file_with_values:
cols = line.split("\t")
value_list += [cols[col - 1]]
file_with_values.close()
file_with_values = open(file_with_values.name)
gtf = gtf.select_by_key(key=key,
invert_match=invert_match,
file_with_values=file_with_values,
col=col)
if log:
not_found = list(set(value_list) - set(all_values))
feat_after = len(gtf)
pct = feat_after / feat_before * 100
message("Number of features before selection: %d" % feat_before)
message("Fraction of feature selected: %.2f%%" % pct)
if len(not_found):
nfj = ",".join(not_found)
max_letter = min(len(nfj), 50)
if len(nfj) > 50:
etc = "..."
else:
etc = ""
message("Values not found: [" + ",".join(not_found)[:max_letter] +
etc + "].")
else:
message("Values not found: [].")
# ----------------------------------------------------------------------
# Write GTF file
# ----------------------------------------------------------------------
if not bed_format:
gtf.write(outputfile, gc_off=True)
else:
nb_tokens = len(names.split(","))
keys = "seqid,start,end," + names + ",score,strand"
nb_fields = len(keys.split(","))
for i in gtf.extract_data_iter_list(keys, zero_based=True):
outputfile.write("\t".join([
i[0],
i[1],
i[2],
separator.join(i[3:(3 + nb_tokens)]),
i[nb_fields - 2],
i[nb_fields - 1],
]) + "\n")
close_properly(outputfile, inputfile)
def closest_genes(
inputfile=None,
outputfile=None,
from_region_type=None,
no_header=False,
nb_neighbors=1,
to_region_type=None,
same_strandedness=False,
diff_strandedness=False,
text_format=False,
identifier="gene_id",
collapse=False):
"""
Find the n closest genes for each gene.
"""
if same_strandedness and diff_strandedness:
message("--same-strandedness and --diff-strandedness are "
"mutually exclusive.",
type="ERROR")
# ----------------------------------------------------------------------
# load GTF
# ----------------------------------------------------------------------
gtf = GTF(inputfile)
gn_gtf = gtf.select_by_key("feature", "gene")
gn_ids = gn_gtf.get_gn_ids(nr=True)
if len(gn_gtf) == 0:
message("No gene feature found. Please use convert_ensembl.",
type="ERROR")
if nb_neighbors >= (len(gn_gtf) - 1):
message("Two much neighbors",
type="ERROR")
all_ids = gn_gtf.extract_data(identifier, as_list=True, no_na=False)
if "." in all_ids:
message("Some identifiers are undefined ('.').",
type="ERROR")
if len(all_ids) == 0:
message("The identifier was not found.",
type="ERROR")
# ----------------------------------------------------------------------
# load GTF and requested regions (for source/'from' transcript)
# ----------------------------------------------------------------------
if from_region_type == 'tss':
from_regions = gn_gtf.get_5p_end(feat_type="gene",
name=[identifier],
).cut([0, 1, 2,
3, 4, 5]).sort()
elif from_region_type == 'tts':
from_regions = gn_gtf.get_3p_end(feat_type="gene",
name=[identifier],
).cut([0, 1, 2,
3, 4, 5]).sort()
elif from_region_type == 'gene':
from_regions = gn_gtf.to_bed(name=[identifier],
).cut([0, 1, 2,
3, 4, 5]).sort()
else:
message("Unknown type.", type="ERROR")
# ----------------------------------------------------------------------
# load GTF and requested regions (for dest/'to' transcript)
# ----------------------------------------------------------------------
if to_region_type == 'tss':
to_regions = gn_gtf.get_5p_end(feat_type="gene",
name=[identifier],
).cut([0, 1, 2,
3, 4, 5]).sort()
elif to_region_type == 'tts':
to_regions = gn_gtf.get_3p_end(feat_type="gene",
name=[identifier],
).cut([0, 1, 2,
3, 4, 5]).sort()
elif to_region_type == 'gene':
to_regions = gn_gtf.to_bed(name=[identifier],
).cut([0, 1, 2,
3, 4, 5]).sort()
else:
message("Unknown type.", type="ERROR")
# ----------------------------------------------------------------------
# Search closest genes
# ----------------------------------------------------------------------
gene_closest = defaultdict(list)
gene_closest_dist = defaultdict(list)
closest_bo = from_regions.closest(b=to_regions,
k=nb_neighbors,
N=True,
s=same_strandedness,
S=diff_strandedness,
d=True)
for i in closest_bo:
gene_closest[i[3]] += [i[9]]
gene_closest_dist[i[3]] += [i[12]]
if not text_format:
if len(gene_closest):
gtf = gtf.add_attr_from_dict(feat="gene",
key=identifier,
a_dict=gene_closest,
new_key="closest_gn")
gtf = gtf.add_attr_from_dict(feat="gene",
key=identifier,
a_dict=gene_closest_dist,
new_key="closest_dist")
gtf.write(outputfile, gc_off=True)
else:
if not no_header:
outputfile.write("genes\tclosest_genes\tdistances\n")
for gene in gn_ids:
if not collapse:
outputfile.write("\t".join([gene,
",".join(gene_closest[gene]),
",".join(gene_closest_dist[gene])]) + "\n")
else:
for closest, dist in zip(gene_closest[gene],
gene_closest_dist[gene]):
outputfile.write("\t".join([gene,
closest,
dist]) + "\n")
gc.disable()
close_properly(outputfile, inputfile)
def convergent(inputfile=None,
outputfile=None,
upstream=1500,
downstream=1500,
chrom_info=None):
"""
Find transcript with convergent tts.
"""
message("Using -u " + str(upstream) + ".")
message("Using -d " + str(downstream) + ".")
tx_to_convergent_nm = dict()
dist_to_convergent = dict()
tts_pos = dict()
message("Loading GTF.")
gtf = GTF(inputfile)
message("Getting transcript coordinates.")
tx_feat = gtf.select_by_key("feature", "transcript")
message("Getting tts coordinates.")
tts_bo = tx_feat.get_tts(name=["transcript_id", "gene_id"], sep="||")
# get tts position
for i in tts_bo:
tx_id_ov, gn_id_ov = i.name.split("||")
tts_pos[tx_id_ov] = int(i.start)
message("Getting tts coordinates.")
tts_region_bo = tts_bo.slop(s=True,
l=upstream,
r=downstream,
g=chrom_info.name).cut([0, 1, 2, 3, 4, 5])
message("Intersecting...")
tts_intersect_bo = tts_region_bo.intersect(tts_bo,
wb=True,
s=False,
S=True)
tmp_file = make_tmp_file("tts_slop", ".bed")
tts_region_bo.saveas(tmp_file.name)
tmp_file = make_tmp_file("tts_slop_intersection_with_tts_as_", ".bed")
tts_intersect_bo.saveas(tmp_file.name)
for i in tts_intersect_bo:
tx_id_main, gene_id_main = i.fields[3].split("||")
tx_id_ov, gn_id_ov = i.fields[9].split("||")
if gene_id_main != gn_id_ov:
if tx_id_main in tx_to_convergent_nm:
dist = abs(tts_pos[tx_id_main] - tts_pos[tx_id_ov])
if dist < dist_to_convergent[tx_id_main]:
dist_to_convergent[tx_id_main] = dist
tx_to_convergent_nm[tx_id_main] = tx_id_ov
else:
dist = abs(tts_pos[tx_id_main] - tts_pos[tx_id_ov])
dist_to_convergent[tx_id_main] = dist
tx_to_convergent_nm[tx_id_main] = tx_id_ov
if len(tx_to_convergent_nm):
gtf = gtf.add_attr_from_dict(feat="transcript",
key="transcript_id",
a_dict=tx_to_convergent_nm,
new_key="convergent")
gtf = gtf.add_attr_from_dict(feat="transcript",
key="transcript_id",
a_dict=dist_to_convergent,
new_key="dist_to_convergent")
gtf.write(outputfile, gc_off=True)
close_properly(outputfile, inputfile)
def tss_numbering(inputfile=None,
outputfile=None,
compute_dist=False,
key_name='tss_number',
key_name_dist='dist_to_first_tss',
add_nb_tss_to_gene=False,
gene_key='nb_tss'):
"""
Computes the distance between TSS of gene transcripts.
"""
gtf = GTF(inputfile, check_ensembl_format=True)
gn_tss_dist = defaultdict(dict)
message("Getting TSSs.")
tss = gtf.get_tss(name=["transcript_id"], as_dict=True)
tx_to_gn = gtf.get_tx_to_gn()
for k in tss:
gn_id = tx_to_gn[k]
gn_tss_dist[gn_id][k] = int(tss[k])
# if_dict_of_dict is true, get_gn_to_tx() returns a dict of dict
# that maps gene_id to transcript_id and transcript_id to TSS
# numbering (1 for most 5', then 2...). For transcripts having
# the same TSSs, the tss number will be the same.
gn_to_tx_to_tss = gtf.get_gn_to_tx(as_dict_of_dict=True)
message("Numbering TSSs.")
tss_number_file = make_tmp_file(prefix='tx_to_tss_number', suffix='.txt')
gn_how_many_tss = dict()
for gn_id in gn_to_tx_to_tss:
for tx_id in gn_to_tx_to_tss[gn_id]:
tss_num = str(gn_to_tx_to_tss[gn_id][tx_id])
tss_number_file.write(tx_id + "\t" + tss_num + "\n")
if gn_id not in gn_how_many_tss:
gn_how_many_tss[gn_id] = tss_num
else:
if int(tss_num) > int(gn_how_many_tss[gn_id]):
gn_how_many_tss[gn_id] = tss_num
tss_number_file.close()
gtf = gtf.add_attr_from_file(feat='transcript',
key='transcript_id',
new_key=key_name,
inputfile=open(tss_number_file.name),
has_header=False)
if add_nb_tss_to_gene:
gn_how_many_tss_file = make_tmp_file(prefix='gn_how_many_tss',
suffix='.txt')
for a_key, a_val in gn_how_many_tss.items():
gn_how_many_tss_file.write(a_key + "\t" + a_val + "\n")
gn_how_many_tss_file.close()
gtf = gtf.add_attr_from_file(feat='gene',
key='gene_id',
new_key=gene_key,
inputfile=open(gn_how_many_tss_file.name),
has_header=False)
if compute_dist:
gn_to_tx_ordered_by_tss = gtf.get_gn_to_tx(ordered_5p=True)
tss_dist_file = make_tmp_file(prefix='tx_tss_dist_to_first_tss',
suffix='.txt')
for gn_id in gn_to_tx_to_tss:
tx_list = gn_to_tx_ordered_by_tss[gn_id]
tx_first = tx_list.pop(0)
# The first tss as distance 0 to the
# first tss...
tss_dist_file.write(tx_first + "\t0\n")
for tx_id in tx_list:
dist_to_first = abs(int(tss[tx_first]) - int(tss[tx_id]))
tss_dist_file.write(tx_id + "\t" + str(dist_to_first) + "\n")
tss_dist_file.close()
gtf = gtf.add_attr_from_file(feat='transcript',
key='transcript_id',
new_key=key_name_dist,
inputfile=open(tss_dist_file.name),
has_header=False)
gtf.write(outputfile, gc_off=True)
close_properly(outputfile, inputfile)
def divergent(
inputfile=None,
outputfile=None,
key_name=None,
upstream=1500,
downstream=1500,
chrom_info=None,
no_strandness=False,
no_annotation=False):
"""
Find transcript with divergent promoters.
"""
message("Using -u " + str(upstream) + ".")
message("Using -d " + str(downstream) + ".")
tx_with_divergent = dict()
dist_to_divergent = dict()
tss_pos = dict()
message("Loading GTF.")
gtf = GTF(inputfile)
message("Getting transcript coordinates.")
tx_feat = gtf.select_by_key("feature",
"transcript")
message("Getting tss coordinates.")
tss_bo = tx_feat.get_tss(name=["transcript_id", "gene_id"],
sep="||")
# get tss position
for i in tss_bo:
tx_id_tss, gn_id_tss = i.name.split("||")
tss_pos[tx_id_tss] = int(i.start)
message("Getting promoter coordinates.")
promoter_bo = tss_bo.slop(s=True,
l=upstream,
r=downstream,
g=chrom_info.name).cut([0, 1,
2, 3,
4, 5])
message("Intersecting...")
if no_strandness:
prom_with_tss_bo = promoter_bo.intersect(tss_bo,
wb=True,
s=False,
S=False)
else:
prom_with_tss_bo = promoter_bo.intersect(tss_bo,
wb=True,
s=False,
S=True)
tmp_file = make_tmp_file("promoter_slop", ".bed")
promoter_bo.saveas(tmp_file.name)
tmp_file = make_tmp_file("promoter_intersection_with_tss_as_", ".bed")
prom_with_tss_bo.saveas(tmp_file.name)
for i in prom_with_tss_bo:
tx_id_tss, gn_id_tss = i.fields[9].split("||")
tx_id_prom, gene_id_prom = i.fields[3].split("||")
if gene_id_prom != gn_id_tss:
if tx_id_prom in tx_with_divergent:
dist = abs(tss_pos[tx_id_prom] - tss_pos[tx_id_tss])
if dist < dist_to_divergent[tx_id_prom]:
dist_to_divergent[tx_id_prom] = dist
tx_with_divergent[tx_id_prom] = tx_id_tss
else:
dist = abs(tss_pos[tx_id_prom] - tss_pos[tx_id_tss])
dist_to_divergent[tx_id_prom] = dist
tx_with_divergent[tx_id_prom] = tx_id_tss
if not no_annotation:
if key_name is None:
key_name = "divergent"
key_name_dist = "dist_to_divergent"
else:
key_name_dist = "dist_" + key_name
if len(tx_with_divergent):
gtf = gtf.add_attr_from_dict(feat="transcript",
key="transcript_id",
a_dict=tx_with_divergent,
new_key=key_name)
gtf = gtf.add_attr_from_dict(feat="transcript",
key="transcript_id",
a_dict=dist_to_divergent,
new_key=key_name_dist)
gtf.write(outputfile,
gc_off=True)
else:
gtf.select_by_key("transcript_id",
",".join(list(tx_with_divergent.keys()))).write(outputfile, gc_off=True)
close_properly(outputfile, inputfile)
def join_attr(inputfile=None,
outputfile=None,
join_file=None,
has_header=False,
new_key=None,
target_feature=None,
key_to_join=None,
matrix=None):
"""
Join attributes from a tabulated file.
"""
# -----------------------------------------------------------
# Check argument consistency
# -----------------------------------------------------------
if matrix is True:
if new_key is not None:
message("--new-key and --matrix are mutually exclusive.",
type="ERROR")
else:
if new_key is None:
message("--new-key is required when --matrix is False.",
type="ERROR")
# -----------------------------------------------------------
# load the GTF
# -----------------------------------------------------------
gtf = GTF(inputfile, check_ensembl_format=False)
# -----------------------------------------------------------
# Check target feature
# -----------------------------------------------------------
feat_list = gtf.get_feature_list(nr=True)
if target_feature is not None:
target_feature_list = target_feature.split(",")
for i in target_feature_list:
if i not in feat_list + ["*"]:
message("Feature " + i + " not found.", type="ERROR")
else:
target_feature = ",".join(feat_list)
# -----------------------------------------------------------
# Do it
# -----------------------------------------------------------
if not matrix:
gtf = gtf.add_attr_from_file(feat=target_feature,
key=key_to_join,
new_key=new_key,
inputfile=join_file.name,
has_header=has_header)
gtf.write(outputfile, gc_off=True)
else:
gtf = gtf.add_attr_from_matrix_file(feat=target_feature,
key=key_to_join,
inputfile=join_file.name)
gtf.write(outputfile, gc_off=True)
gc.disable()
close_properly(outputfile, inputfile)
