def get_data_from_gencode_gtf(gtf_file):
"""
Parse gencode GTF file
Returns iter of (datatype, dict) tuples
datatype is one of gene, transcript, exon, cds
dict is the corresponding object
"""
for line in gtf_file:
if line.startswith('#'):
continue
fields = line.strip('\n').split('\t')
if fields[2] not in ['gene', 'transcript', 'exon', 'CDS']:
continue
chrom = fields[0][3:]
if len(chrom) > 3:
continue # skip the pseudo contigs
start = int(fields[3]) # GTF files are 1-indexed: http://www.ensembl.org/info/website/upload/gff.html
stop = int(fields[4])
info = dict(x.strip().split() for x in fields[8].split(';') if x != '')
info = {k: v.strip('"') for k, v in info.items()}
if 'gene_id' in info:
info['gene_id'] = info['gene_id'].split('.')[0]
# TODO: ignore all entities that are part of an ENSGR gene
if info['gene_id'].startswith('ENSGR'):
continue
if 'transcript_id' in info:
info['transcript_id'] = info['transcript_id'].split('.')[0]
if 'exon_id' in info:
info['exon_id'] = info['exon_id'].split('.')[0]
info['chrom'] = chrom
info['start'] = start
info['stop'] = stop
info['xstart'] = get_xpos(chrom, start)
info['xstop'] = get_xpos(chrom, stop)
# pretend 'CDS' isn't capitalized in gencode gtf file
yield fields[2].lower(), info
def parse_clinvar_vcf(clinvar_vcf_path=None):
"""Load clinvar vcf file
Rows have the following format:
#CHROM\tPOS\tID\tREF\tALT\tQUAL\tFILTER\tINFO
1\t949422\t475283\tG\tA\t.\t.\tALLELEID=446939;CLNDISDB=MedGen:C4015293,OMIM:616126,Orphanet:ORPHA319563;CLNDN=Immunodeficiency_38_with_basal_ganglia_calcification;CLNHGVS=NC_000001.10:g.949422G>A;CLNREVSTAT=criteria_provided,_single_submitter;CLNSIG=Benign;CLNVC=single_nucleotide_variant;CLNVCSO=SO:0001483;GENEINFO=ISG15:9636;MC=SO:0001583|missense_variant;ORIGIN=1;RS=143888043
Args:
clinvar_vcf_path (string): optional alternate path
"""
if clinvar_vcf_path is None:
clinvar_vcf_path = settings.REFERENCE_SETTINGS.clinvar_vcf_file
header = None
clinvar_file = gzip.open(clinvar_vcf_path) if clinvar_vcf_path.endswith(".gz") else open(clinvar_vcf_path)
for line in tqdm.tqdm(clinvar_file, unit=" clinvar records"):
line = line.strip()
if line.startswith("##"):
continue
if header is None:
header = get_vcf_headers(line)
continue
fields = line.split("\t")
fields = dict(zip(header, fields))
info_fields = dict([info.split('=') for info in fields['INFO'].split(';')])
fields.update(info_fields)
chrom = fields["CHROM"]
pos = int(fields["POS"])
ref = fields["REF"]
alt = fields["ALT"]
variant_id = fields["ID"]
if not valid_chrom(chrom):
continue
clinical_significance = fields.get("CLNSIG", "").lower()
if clinical_significance in ["", "not provided", "other", "association"]:
continue
yield {
'xpos': get_xpos(chrom, pos),
'ref': ref,
'alt': alt,
'variant_id': variant_id,
'clinsig': clinical_significance,
}
header = fields
else:
line_dict = dict(zip(header, fields))
chrom = line_dict["chrom"]
pos = int(line_dict["pos"])
ref = line_dict["ref"]
alt = line_dict["alt"]
if "M" in chrom:
continue # because get_xpos doesn't support chrMT.
clinical_significance = line_dict["clinical_significance"].lower()
if clinical_significance in ["not provided", "other", "association"]:
continue
else:
for c in clinical_significance.split(";"):
pathogenicity_values_counter[c] += 1
xpos = get_xpos(chrom, pos)
CLINVAR_VARIANTS[(xpos, ref, alt)] = (line_dict["measureset_id"], clinical_significance)
#for k in sorted(pathogenicity_values_counter.keys(), key=lambda k: -pathogenicity_values_counter[k]):
# print(" %5d %s" % (pathogenicity_values_counter[k], k))
# set the secret key
if os.access("/etc/xbrowse_django_secret_key", os.R_OK):
with open("/etc/xbrowse_django_secret_key") as f:
SECRET_KEY = f.read().strip()
SESSION_COOKIE_SECURE = True
CSRF_COOKIE_SECURE = True
else:
print("Warning: could not access /etc/xbrowse_django_secret_key. Falling back on insecure hard-coded SECRET_KEY")
SECRET_KEY = "~~~ this key string is FOR DEVELOPMENT USE ONLY ~~~"
header = fields
else:
line_dict = dict(zip(header, fields))
chrom = line_dict["chrom"]
pos = int(line_dict["pos"])
ref = line_dict["ref"]
alt = line_dict["alt"]
if "M" in chrom:
continue # because get_xpos doesn't support chrMT.
clinical_significance = line_dict["clinical_significance"].lower()
if clinical_significance in ["not provided", "other", "association"]:
continue
else:
for c in clinical_significance.split(";"):
pathogenicity_values_counter[c] += 1
xpos = get_xpos(chrom, pos)
CLINVAR_VARIANTS[(xpos, ref, alt)] = (line_dict["measureset_id"], clinical_significance)
#for k in sorted(pathogenicity_values_counter.keys(), key=lambda k: -pathogenicity_values_counter[k]):
# print(" %5d %s" % (pathogenicity_values_counter[k], k))
# print("%d variants loaded" % len(CLINVAR_VARIANTS))
if len(sys.argv) >= 2 and sys.argv[1] == 'test':
# use in-memory sqlite database for running tests
DATABASES['default'] = {
'ENGINE': 'django.db.backends.sqlite3',
'NAME': 'seqr_test_db.sqlite',
'USER': '',
'PASSWORD': '',
'HOST': '',
'PORT': '',
def get_clinvar_variants():
global _CLINVAR_VARIANTS
if _CLINVAR_VARIANTS is None:
if not settings.CLINVAR_TSV:
raise ValueError("settings.CLINVAR_TSV not set")
if not os.path.isfile(settings.CLINVAR_TSV):
raise ValueError("settings.CLINVAR_TSV file not found: %s" %
(settings.CLINVAR_TSV, ))
_CLINVAR_VARIANTS = {}
header = None
pathogenicity_values_counter = collections.defaultdict(int)
print("Reading Clinvar data into memory: " + settings.CLINVAR_TSV)
for line in open(settings.CLINVAR_TSV):
line = line.strip()
if line.startswith("#"):
continue
fields = line.split("\t")
if header is None:
header = fields
if "clinical_significance" not in line.lower():
raise ValueError(
"'clinical_significance' not found in header line: %s"
% str(header))
continue
try:
if "clinical_significance" in line.lower():
raise ValueError(
"'clinical_significance' found in non-header line: %s"
% str(header))
line_dict = dict(zip(header, fields))
chrom = line_dict["chrom"]
pos = int(line_dict["pos"])
ref = line_dict["ref"]
alt = line_dict["alt"]
if "M" in chrom:
continue # because get_xpos doesn't support chrMT.
clinical_significance = line_dict[
"clinical_significance"].lower()
if clinical_significance in [
"not provided", "other", "association"
]:
continue
else:
for c in clinical_significance.split(";"):
pathogenicity_values_counter[c] += 1
xpos = get_xpos(chrom, pos)
_CLINVAR_VARIANTS[(xpos, ref,
alt)] = (line_dict.get("variation_id")
or
line_dict.get("measureset_id"),
clinical_significance)
#for k in sorted(pathogenicity_values_counter.keys(), key=lambda k: -pathogenicity_values_counter[k]):
# sys.stderr.write((" %5d %s\n" % (pathogenicity_values_counter[k], k)))
#sys.stderr.write("%d clinvar variants loaded \n" % len(CLINVAR_VARIANTS))
except Exception as e:
sys.stderr.write(
"Error while parsing clinvar row: \n%s\n %s\n" % (
line,
e,
))
return _CLINVAR_VARIANTS
