def call_peaks(sample, pipe_manager, args):
"""
Calls peaks for a sample give a control sample specified as a `compare_sample` attribute.
"""
print("Start calling peaks for sample '{}'.".format(sample.name))
for path in ["sample_root"] + list(sample.paths.__dict__.keys()):
try:
exists = os.path.exists(sample.paths[path])
except TypeError:
continue
if not exists:
try:
os.mkdir(sample.paths[path])
except OSError("Cannot create '%s' path: %s" %
(path, sample.paths[path])):
raise
# Create NGSTk instance
tk = NGSTk(pm=pipe_manager)
if pipe_manager.config.parameters.peak_caller == "macs2":
pipe_manager.timestamp("Calling peaks with MACS2")
# make dir for output (macs fails if it does not exist)
if not os.path.exists(sample.paths.peaks):
os.makedirs(sample.paths.peaks)
# For point-source factors use default settings
# For broad factors use broad settings
cmd = tk.macs2CallPeaks(treatmentBams=sample.filtered,
controlBams=sample.filtered.replace(
sample.name, sample.compare_sample),
outputDir=sample.paths.peaks,
sampleName=sample.name,
genome=sample.genome,
broad=sample.broad,
paired=sample.paired)
pipe_manager.run(cmd, sample.peaks, shell=True)
report_dict(pipe_manager, parse_peak_number(sample.peaks))
if not sample.broad:
pipe_manager.timestamp("Ploting MACS2 model")
cmd = tk.macs2PlotModel(r_peak_model_file=sample.r_peak_model_file,
sample_name=sample.name,
output_dir=sample.paths.peaks)
pipe_manager.run(cmd,
os.path.join(sample.paths.peaks,
sample.name + "_model.pdf"),
shell=True,
nofail=True)
elif pipe_manager.config.parameters.peak_caller == "spp":
pipe_manager.timestamp("Calling peaks with spp")
# For point-source factors use default settings
# For broad factors use broad settings
cmd = tk.sppCallPeaks(treatmentBam=sample.filtered,
controlBam=sample.filtered.replace(
sample.name, sample.compare_sample),
treatmentName=sample.name,
controlName=sample.compare_sample,
outputDir=os.path.join(sample.paths.peaks,
sample.name),
broad=sample.broad,
cpus=args.cpus)
pipe_manager.run(cmd, sample.peaks, shell=True)
# Calculate fraction of reads in peaks (FRiP)
pipe_manager.timestamp("Calculating fraction of reads in peaks (FRiP)")
cmd = tk.calculate_FRiP(inputBam=sample.filtered,
inputBed=sample.peaks,
output=sample.frip,
cpus=args.cores)
pipe_manager.run(cmd, sample.frip, shell=True)
total = (float(pipe_manager.stats_dict["filtered_single_ends"]) +
(float(pipe_manager.stats_dict["filtered_paired_ends"]) / 2.))
report_dict(pipe_manager, parse_FRiP(sample.frip, total))
print("Finished calling peaks for sample '{}'.".format(sample.name))
pipe_manager.stop_pipeline()
def process(sample, pipe_manager, args):
"""
This takes unmapped Bam files and makes trimmed, aligned, duplicate marked
and removed, indexed, shifted Bam files along with a UCSC browser track.
Peaks are called and filtered.
"""
print("Start processing ATAC-seq sample %s." % sample.sample_name)
for path in ["sample_root"] + sample.paths.__dict__.keys():
try:
exists = os.path.exists(sample.paths[path])
except TypeError:
continue
if not exists:
try:
os.mkdir(sample.paths[path])
except OSError("Cannot create '%s' path: %s" %
(path, sample.paths[path])):
raise
# Create NGSTk instance
tk = NGSTk(pm=pipe_manager)
# Merge Bam files if more than one technical replicate
if len(sample.data_path.split(" ")) > 1:
pipe_manager.timestamp("Merging bam files from replicates")
cmd = tk.merge_bams(
input_bams=sample.data_path.split(
" "), # this is a list of sample paths
merged_bam=sample.unmapped)
pipe_manager.run(cmd, sample.unmapped, shell=True)
sample.data_path = sample.unmapped
# Fastqc
pipe_manager.timestamp("Measuring sample quality with Fastqc")
cmd = tk.fastqc_rename(input_bam=sample.data_path,
output_dir=sample.paths.sample_root,
sample_name=sample.sample_name)
pipe_manager.run(cmd,
os.path.join(sample.paths.sample_root,
sample.sample_name + "_fastqc.zip"),
shell=True)
report_dict(
pipe_manager,
parse_fastqc(os.path.join(sample.paths.sample_root,
sample.sample_name + "_fastqc.zip"),
prefix="fastqc_"))
# Convert bam to fastq
pipe_manager.timestamp("Converting to Fastq format")
cmd = tk.bam2fastq(
inputBam=sample.data_path,
outputFastq=sample.fastq1 if sample.paired else sample.fastq,
outputFastq2=sample.fastq2 if sample.paired else None,
unpairedFastq=sample.fastq_unpaired if sample.paired else None)
pipe_manager.run(cmd,
sample.fastq1 if sample.paired else sample.fastq,
shell=True)
if not sample.paired:
pipe_manager.clean_add(sample.fastq, conditional=True)
if sample.paired:
pipe_manager.clean_add(sample.fastq1, conditional=True)
pipe_manager.clean_add(sample.fastq2, conditional=True)
pipe_manager.clean_add(sample.fastq_unpaired, conditional=True)
# Trim reads
pipe_manager.timestamp("Trimming adapters from sample")
if pipe_manager.config.parameters.trimmer == "trimmomatic":
cmd = tk.trimmomatic(
inputFastq1=sample.fastq1 if sample.paired else sample.fastq,
inputFastq2=sample.fastq2 if sample.paired else None,
outputFastq1=sample.trimmed1 if sample.paired else sample.trimmed,
outputFastq1unpaired=sample.trimmed1_unpaired
if sample.paired else None,
outputFastq2=sample.trimmed2 if sample.paired else None,
outputFastq2unpaired=sample.trimmed2_unpaired
if sample.paired else None,
cpus=args.cores,
adapters=pipe_manager.config.resources.adapters,
log=sample.trimlog)
pipe_manager.run(cmd,
sample.trimmed1 if sample.paired else sample.trimmed,
shell=True)
if not sample.paired:
pipe_manager.clean_add(sample.trimmed, conditional=True)
else:
pipe_manager.clean_add(sample.trimmed1, conditional=True)
pipe_manager.clean_add(sample.trimmed1_unpaired, conditional=True)
pipe_manager.clean_add(sample.trimmed2, conditional=True)
pipe_manager.clean_add(sample.trimmed2_unpaired, conditional=True)
elif pipe_manager.config.parameters.trimmer == "skewer":
cmd = tk.skewer(
inputFastq1=sample.fastq1 if sample.paired else sample.fastq,
inputFastq2=sample.fastq2 if sample.paired else None,
outputPrefix=os.path.join(sample.paths.unmapped,
sample.sample_name),
outputFastq1=sample.trimmed1 if sample.paired else sample.trimmed,
outputFastq2=sample.trimmed2 if sample.paired else None,
trimLog=sample.trimlog,
cpus=args.cores,
adapters=pipe_manager.config.resources.adapters)
pipe_manager.run(cmd,
sample.trimmed1 if sample.paired else sample.trimmed,
shell=True)
if not sample.paired:
pipe_manager.clean_add(sample.trimmed, conditional=True)
else:
pipe_manager.clean_add(sample.trimmed1, conditional=True)
pipe_manager.clean_add(sample.trimmed2, conditional=True)
report_dict(
pipe_manager,
parse_trim_stats(sample.trimlog,
prefix="trim_",
paired_end=sample.paired))
# Map
pipe_manager.timestamp("Mapping reads with Bowtie2")
cmd = tk.bowtie2Map(
inputFastq1=sample.trimmed1 if sample.paired else sample.trimmed,
inputFastq2=sample.trimmed2 if sample.paired else None,
outputBam=sample.mapped,
log=sample.aln_rates,
metrics=sample.aln_metrics,
genomeIndex=getattr(pipe_manager.config.resources.genomes,
sample.genome),
maxInsert=pipe_manager.config.parameters.max_insert,
cpus=args.cores)
pipe_manager.run(cmd, sample.mapped, shell=True)
report_dict(
pipe_manager,
parse_mapping_stats(sample.aln_rates, paired_end=sample.paired))
# Get mitochondrial reads
pipe_manager.timestamp("Getting mitochondrial stats")
cmd = tk.get_mitochondrial_reads(bam_file=sample.mapped,
output=sample.mitochondrial_stats,
cpus=args.cores)
pipe_manager.run(cmd, sample.mitochondrial_stats, shell=True, nofail=True)
report_dict(
pipe_manager,
parse_duplicate_stats(sample.mitochondrial_stats, prefix="MT_"))
# Filter reads
pipe_manager.timestamp("Filtering reads for quality")
cmd = tk.filterReads(inputBam=sample.mapped,
outputBam=sample.filtered,
metricsFile=sample.dups_metrics,
paired=sample.paired,
cpus=args.cores,
Q=pipe_manager.config.parameters.read_quality)
pipe_manager.run(cmd, sample.filtered, shell=True)
report_dict(pipe_manager, parse_duplicate_stats(sample.dups_metrics))
# Shift reads
if sample.tagmented:
pipe_manager.timestamp("Shifting reads of tagmented sample")
cmd = tk.shiftReads(inputBam=sample.filtered,
genome=sample.genome,
outputBam=sample.filteredshifted)
pipe_manager.run(cmd, sample.filteredshifted, shell=True)
# Index bams
pipe_manager.timestamp("Indexing bamfiles with samtools")
cmd = tk.indexBam(inputBam=sample.mapped)
pipe_manager.run(cmd, sample.mapped + ".bai", shell=True)
cmd = tk.indexBam(inputBam=sample.filtered)
pipe_manager.run(cmd, sample.filtered + ".bai", shell=True)
if sample.tagmented:
cmd = tk.indexBam(inputBam=sample.filteredshifted)
pipe_manager.run(cmd, sample.filteredshifted + ".bai", shell=True)
track_dir = os.path.dirname(sample.bigwig)
if not os.path.exists(track_dir):
os.makedirs(track_dir)
# Make tracks
# right now tracks are only made for bams without duplicates
pipe_manager.timestamp("Making bigWig tracks from bam file")
cmd = bamToBigWig(
inputBam=sample.filtered,
outputBigWig=sample.bigwig,
genomeSizes=getattr(pipe_manager.config.resources.chromosome_sizes,
sample.genome),
genome=sample.genome,
tagmented=pipe_manager.config.parameters.
tagmented, # by default make extended tracks
normalize=pipe_manager.config.parameters.normalize_tracks,
norm_factor=pipe_manager.config.parameters.norm_factor)
pipe_manager.run(cmd, sample.bigwig, shell=True)
# Plot fragment distribution
if sample.paired and not os.path.exists(sample.insertplot):
pipe_manager.timestamp("Plotting insert size distribution")
tk.plot_atacseq_insert_sizes(bam=sample.filtered,
plot=sample.insertplot,
output_csv=sample.insertdata)
pipe_manager.report_figure("insert_sizes", sample.insertplot)
# Count coverage genome-wide
pipe_manager.timestamp("Calculating genome-wide coverage")
cmd = tk.genomeWideCoverage(
inputBam=sample.filtered,
genomeWindows=getattr(pipe_manager.config.resources.genome_windows,
sample.genome),
output=sample.coverage)
pipe_manager.run(cmd, sample.coverage, shell=True)
# Calculate NSC, RSC
pipe_manager.timestamp("Assessing signal/noise in sample")
cmd = tk.peakTools(inputBam=sample.filtered,
output=sample.qc,
plot=sample.qc_plot,
cpus=args.cores)
pipe_manager.run(cmd, sample.qc_plot, shell=True, nofail=True)
report_dict(pipe_manager, parse_nsc_rsc(sample.qc))
pipe_manager.report_figure("cross_correlation", sample.qc_plot)
# Call peaks
pipe_manager.timestamp("Calling peaks with MACS2")
# make dir for output (macs fails if it does not exist)
if not os.path.exists(sample.paths.peaks):
os.makedirs(sample.paths.peaks)
cmd = tk.macs2CallPeaksATACSeq(treatmentBam=sample.filtered,
outputDir=sample.paths.peaks,
sampleName=sample.sample_name,
genome=sample.genome)
pipe_manager.run(cmd, sample.peaks, shell=True)
report_dict(pipe_manager, parse_peak_number(sample.peaks))
# Filter peaks
if hasattr(pipe_manager.config.resources.blacklisted_regions,
sample.genome):
pipe_manager.timestamp("Filtering peaks from blacklisted regions")
cmd = filter_peaks(
peaks=sample.peaks,
exclude=getattr(pipe_manager.config.resources.blacklisted_regions,
sample.genome),
filtered_peaks=sample.filtered_peaks)
pipe_manager.run(cmd, sample.filtered_peaks, shell=True)
report_dict(
pipe_manager,
parse_peak_number(sample.filtered_peaks, prefix="filtered_"))
# Calculate fraction of reads in peaks (FRiP)
pipe_manager.timestamp("Calculating fraction of reads in peaks (FRiP)")
# on the sample's peaks
cmd = tk.calculate_FRiP(inputBam=sample.filtered,
inputBed=sample.peaks,
output=sample.frip,
cpus=args.cores)
pipe_manager.run(cmd, sample.frip, shell=True)
total = (float(pipe_manager.stats_dict["filtered_single_ends"]) +
(float(pipe_manager.stats_dict["filtered_paired_ends"]) / 2.))
report_dict(pipe_manager, parse_FRiP(sample.frip, total))
# on an oracle peak list
if hasattr(pipe_manager.config.resources.oracle_peak_regions,
sample.genome):
cmd = tk.calculate_FRiP(
inputBam=sample.filtered,
inputBed=getattr(pipe_manager.config.resources.oracle_peak_regions,
sample.genome),
output=sample.oracle_frip,
cpus=args.cores)
pipe_manager.run(cmd, sample.oracle_frip, shell=True)
report_dict(pipe_manager,
parse_FRiP(sample.oracle_frip, total, prefix="oracle_"))
# Finish up
print(pipe_manager.stats_dict)
pipe_manager.stop_pipeline()
print("Finished processing sample %s." % sample.sample_name)