def prepare_synteny(tourfile, lastfile, odir, p, opts):
"""
Prepare synteny plots for movie().
"""
qbedfile, sbedfile = get_bed_filenames(lastfile, p, opts)
qbedfile = op.abspath(qbedfile)
sbedfile = op.abspath(sbedfile)
qbed = Bed(qbedfile, sorted=False)
contig_to_beds = dict(qbed.sub_beds())
# Create a separate directory for the subplots and movie
mkdir(odir, overwrite=True)
os.chdir(odir)
logging.debug("Change into subdir `{}`".format(odir))
# Make anchorsfile
anchorsfile = ".".join(op.basename(lastfile).split(".",
2)[:2]) + ".anchors"
fw = open(anchorsfile, "w")
for b in Blast(lastfile):
print >> fw, "\t".join(
(gene_name(b.query), gene_name(b.subject), str(int(b.score))))
fw.close()
# Symlink sbed
symlink(sbedfile, op.basename(sbedfile))
return anchorsfile, qbedfile, contig_to_beds
def clr(args):
"""
%prog blastfile fastafiles
Calculate the vector clear range file based BLAST to the vectors.
"""
p = OptionParser(clr.__doc__)
opts, args = p.parse_args(args)
if len(args) < 2:
sys.exit(not p.print_help())
blastfile = args[0]
fastafiles = args[1:]
sizes = {}
for fa in fastafiles:
f = Fasta(fa)
sizes.update(f.itersizes())
b = Blast(blastfile)
seen = set()
for query, hits in b.iter_hits():
qsize = sizes[query]
vectors = list((x.qstart, x.qstop) for x in hits)
vmin, vmax = range_minmax(vectors)
left_size = vmin - 1
right_size = qsize - vmax
if left_size > right_size:
clr_start, clr_end = 0, vmin
else:
clr_start, clr_end = vmax, qsize
print "\t".join(str(x) for x in (query, clr_start, clr_end))
del sizes[query]
for q, size in sorted(sizes.items()):
print "\t".join(str(x) for x in (q, 0, size))
def clr(args):
"""
%prog blastfile fastafiles
Calculate the vector clear range file based BLAST to the vectors.
"""
p = OptionParser(clr.__doc__)
opts, args = p.parse_args(args)
if len(args) < 2:
sys.exit(not p.print_help())
blastfile = args[0]
fastafiles = args[1:]
sizes = {}
for fa in fastafiles:
f = Fasta(fa)
sizes.update(f.itersizes())
b = Blast(blastfile)
seen = set()
for query, hits in b.iter_hits():
qsize = sizes[query]
vectors = list((x.qstart, x.qstop) for x in hits)
vmin, vmax = range_minmax(vectors)
left_size = vmin - 1
right_size = qsize - vmax
if left_size > right_size:
clr_start, clr_end = 0, vmin
else:
clr_start, clr_end = vmax, qsize
print "\t".join(str(x) for x in (query, clr_start, clr_end))
del sizes[query]
for q, size in sorted(sizes.items()):
print "\t".join(str(x) for x in (q, 0, size))
def read_blast(blast_file, qorder, sorder, is_self=False, ostrip=True):
"""
read the blast and convert name into coordinates
"""
filtered_blast = []
seen = set()
bl = Blast(blast_file)
for b in bl:
query, subject = b.query, b.subject
if query == subject:
continue
if ostrip:
query, subject = gene_name(query), gene_name(subject)
if query not in qorder or subject not in sorder:
continue
qi, q = qorder[query]
si, s = sorder[subject]
if is_self:
# remove redundant a<->b to one side when doing self-self BLAST
if qi > si:
query, subject = subject, query
qi, si = si, qi
q, s = s, q
# Too close to diagonal! possible tandem repeats
if q.seqid == s.seqid and si - qi < 40:
continue
key = query, subject
if key in seen:
continue
seen.add(key)
b.qseqid, b.sseqid = q.seqid, s.seqid
b.qi, b.si = qi, si
b.query, b.subject = query, subject
filtered_blast.append(b)
logging.debug("A total of {0} BLAST imported from `{1}`.".\
format(len(filtered_blast), blast_file))
return filtered_blast
def loss(args):
"""
%prog loss a.b.i1.blocks [a.b-genomic.blast]
Extract likely gene loss candidates between genome a and b.
"""
p = OptionParser(loss.__doc__)
p.add_option("--bed", default=False, action="store_true",
help="Genomic BLAST is in bed format [default: %default]")
p.add_option("--gdist", default=20, type="int",
help="Gene distance [default: %default]")
p.add_option("--bdist", default=20000, type="int",
help="Base pair distance [default: %default]")
p.set_beds()
opts, args = p.parse_args(args)
if len(args) not in (1, 2):
sys.exit(not p.print_help())
blocksfile = args[0]
emptyblast = (len(args) == 1)
if emptyblast:
genomicblast = "empty.blast"
sh("touch {0}".format(genomicblast))
else:
genomicblast = args[1]
gdist, bdist = opts.gdist, opts.bdist
qbed, sbed, qorder, sorder, is_self = check_beds(blocksfile, p, opts)
blocks = []
fp = open(blocksfile)
genetrack = {}
proxytrack = {}
for row in fp:
a, b = row.split()
genetrack[a] = b
blocks.append((a, b))
data = []
for key, rows in groupby(blocks, key=lambda x: x[-1]):
rows = list(rows)
data.append((key, rows))
imax = len(data) - 1
for i, (key, rows) in enumerate(data):
if i == 0 or i == imax:
continue
if key != '.':
continue
before, br = data[i - 1]
after, ar = data[i + 1]
bi, bx = sorder[before]
ai, ax = sorder[after]
dist = abs(bi - ai)
if bx.seqid != ax.seqid or dist > gdist:
continue
start, end = range_minmax(((bx.start, bx.end), (ax.start, ax.end)))
start, end = max(start - bdist, 1), end + bdist
proxy = (bx.seqid, start, end)
for a, b in rows:
proxytrack[a] = proxy
tags = {}
if opts.bed:
bed = Bed(genomicblast, sorted=False)
key = lambda x: gene_name(x.accn.rsplit(".", 1)[0])
for query, bb in groupby(bed, key=key):
bb = list(bb)
if query not in proxytrack:
continue
proxy = proxytrack[query]
tag = "NS"
best_b = bb[0]
for b in bb:
hsp = (b.seqid, b.start, b.end)
if range_overlap(proxy, hsp):
tag = "S"
best_b = b
break
hsp = (best_b.seqid, best_b.start, best_b.end)
proxytrack[query] = hsp
tags[query] = tag
else:
blast = Blast(genomicblast)
for query, bb in blast.iter_hits():
bb = list(bb)
query = gene_name(query)
if query not in proxytrack:
continue
proxy = proxytrack[query]
tag = "NS"
best_b = bb[0]
for b in bb:
hsp = (b.subject, b.sstart, b.sstop)
if range_overlap(proxy, hsp):
tag = "S"
best_b = b
break
hsp = (best_b.subject, best_b.sstart, best_b.sstop)
proxytrack[query] = hsp
tags[query] = tag
for b in qbed:
accn = b.accn
target_region = genetrack[accn]
if accn in proxytrack:
target_region = region_str(proxytrack[accn])
if accn in tags:
ptag = "[{0}]".format(tags[accn])
else:
ptag = "[NF]"
target_region = ptag + target_region
print "\t".join((b.seqid, accn, target_region))
if emptyblast:
sh("rm -f {0}".format(genomicblast))
def connect(args):
"""
%prog connect assembly.fasta read_mapping.blast
Connect contigs using long reads.
"""
p = OptionParser(connect.__doc__)
p.add_option(
"--clip",
default=2000,
type="int",
help="Only consider end of contigs",
)
opts, args = p.parse_args(args)
if len(args) != 2:
sys.exit(not p.print_help())
fastafile, blastfile = args
clip = opts.clip
sizes = Sizes(fastafile).mapping
blast = Blast(blastfile)
blasts = []
for b in blast:
seqid = b.subject
size = sizes[seqid]
start, end = b.sstart, b.sstop
cstart, cend = min(size, clip), max(0, size - clip)
if start > cstart and end < cend:
continue
blasts.append(b)
key = lambda x: x.query
blasts.sort(key=key)
g = BiGraph()
for query, bb in groupby(blasts, key=key):
bb = sorted(bb, key=lambda x: x.qstart)
nsubjects = len(set(x.subject for x in bb))
if nsubjects == 1:
continue
print("\n".join(str(x) for x in bb))
for a, b in pairwise(bb):
astart, astop = a.qstart, a.qstop
bstart, bstop = b.qstart, b.qstop
if a.subject == b.subject:
continue
arange = astart, astop
brange = bstart, bstop
ov = range_intersect(arange, brange)
alen = astop - astart + 1
blen = bstop - bstart + 1
if ov:
ostart, ostop = ov
ov = ostop - ostart + 1
print(ov, alen, blen)
if ov and (ov > alen / 2 or ov > blen / 2):
print("Too much overlap ({0})".format(ov))
continue
asub = a.subject
bsub = b.subject
atag = ">" if a.orientation == "+" else "<"
btag = ">" if b.orientation == "+" else "<"
g.add_edge(asub, bsub, atag, btag)
graph_to_agp(g, blastfile, fastafile, verbose=False)
def blastfilter_main(blast_file, p, opts):
qbed, sbed, qorder, sorder, is_self = check_beds(blast_file, p, opts)
tandem_Nmax = opts.tandem_Nmax
cscore = opts.cscore
fp = open(blast_file)
total_lines = sum(1 for line in fp if line[0] != '#')
logging.debug("Load BLAST file `%s` (total %d lines)" % \
(blast_file, total_lines))
bl = Blast(blast_file)
blasts = sorted(list(bl), key=lambda b: b.score, reverse=True)
filtered_blasts = []
seen = set()
ostrip = opts.strip_names
nwarnings = 0
for b in blasts:
query, subject = b.query, b.subject
if query == subject:
continue
if ostrip:
query, subject = gene_name(query), gene_name(subject)
if query not in qorder:
if nwarnings < 100:
logging.warning("{0} not in {1}".format(query, qbed.filename))
elif nwarnings == 100:
logging.warning("too many warnings.. suppressed")
nwarnings += 1
continue
if subject not in sorder:
if nwarnings < 100:
logging.warning("{0} not in {1}".format(
subject, sbed.filename))
elif nwarnings == 100:
logging.warning("too many warnings.. suppressed")
nwarnings += 1
continue
qi, q = qorder[query]
si, s = sorder[subject]
if is_self and qi > si:
# move all hits to same side when doing self-self BLAST
query, subject = subject, query
qi, si = si, qi
q, s = s, q
key = query, subject
if key in seen:
continue
seen.add(key)
b.query, b.subject = key
b.qi, b.si = qi, si
b.qseqid, b.sseqid = q.seqid, s.seqid
filtered_blasts.append(b)
if cscore:
before_filter = len(filtered_blasts)
logging.debug("running the cscore filter (cscore>=%.2f) .." % cscore)
filtered_blasts = list(filter_cscore(filtered_blasts, cscore=cscore))
logging.debug("after filter (%d->%d) .." %
(before_filter, len(filtered_blasts)))
if tandem_Nmax:
logging.debug("running the local dups filter (tandem_Nmax=%d) .." % \
tandem_Nmax)
qtandems = tandem_grouper(qbed,
filtered_blasts,
flip=True,
tandem_Nmax=tandem_Nmax)
standems = tandem_grouper(sbed,
filtered_blasts,
flip=False,
tandem_Nmax=tandem_Nmax)
qdups_fh = open(op.splitext(opts.qbed)[0] + ".localdups", "w") \
if opts.tandems_only else None
if is_self:
for s in standems:
qtandems.join(*s)
qdups_to_mother = write_localdups(qtandems, qbed, qdups_fh)
sdups_to_mother = qdups_to_mother
else:
qdups_to_mother = write_localdups(qtandems, qbed, qdups_fh)
sdups_fh = open(op.splitext(opts.sbed)[0] + ".localdups", "w") \
if opts.tandems_only else None
sdups_to_mother = write_localdups(standems, sbed, sdups_fh)
if opts.tandems_only:
# write out new .bed after tandem removal
write_new_bed(qbed, qdups_to_mother)
if not is_self:
write_new_bed(sbed, sdups_to_mother)
# just want to use this script as a tandem finder.
#sys.exit()
before_filter = len(filtered_blasts)
filtered_blasts = list(filter_tandem(filtered_blasts, \
qdups_to_mother, sdups_to_mother))
logging.debug("after filter (%d->%d) .." % \
(before_filter, len(filtered_blasts)))
blastfilteredfile = blast_file + ".filtered"
fw = open(blastfilteredfile, "w")
write_new_blast(filtered_blasts, fh=fw)
fw.close()
def rnaseq(args):
"""
%prog rnaseq blastfile ref.fasta
Evaluate de-novo RNA-seq assembly against a reference gene set (same or
closely related organism). Ideally blatfile needs to be supermap'd.
Following metric is used (Martin et al. 2010, Rnnotator paper):
Accuracy: % of contigs share >=95% identity with ref genome (TODO)
Completeness: % of ref genes covered by contigs to >=80% of their lengths
Contiguity: % of ref genes covered by a *single* contig >=80% of lengths
Chimer: % of contigs that contain two or more annotated genes >= 50bp
"""
from jcvi.algorithms.supermap import supermap
p = OptionParser(rnaseq.__doc__)
opts, args = p.parse_args(args)
if len(args) != 2:
sys.exit(p.print_help())
blastfile, reffasta = args
sizes = Sizes(reffasta).mapping
known_genes = len(sizes)
querysupermap = blastfile + ".query.supermap"
refsupermap = blastfile + ".ref.supermap"
if not op.exists(querysupermap):
supermap(blastfile, filter="query")
if not op.exists(refsupermap):
supermap(blastfile, filter="ref")
blast = Blast(querysupermap)
chimers = 0
goodctg80 = set()
goodctg50 = set()
for ctg, hits in blast.iter_hits():
bps = defaultdict(int)
for x in hits:
bps[x.subject] += abs(x.sstop - x.sstart) + 1
valid_hits = bps.items()
for vh, length in valid_hits:
rsize = sizes[vh]
ratio = length * 100. / rsize
if ratio >= 80:
goodctg80.add(ctg)
if ratio >= 50:
goodctg50.add(ctg)
# Chimer
if len(valid_hits) > 1:
chimers += 1
blast = Blast(refsupermap)
goodref80 = set()
goodref50 = set()
bps = defaultdict(int)
for x in blast.iter_line():
bps[x.subject] += abs(x.sstop - x.sstart) + 1
for vh, length in bps.items():
rsize = sizes[vh]
ratio = length * 100. / rsize
if ratio >= 80:
goodref80.add(vh)
if ratio >= 50:
goodref50.add(vh)
print >> sys.stderr, "Reference set: `{0}`, # of transcripts {1}".\
format(reffasta, known_genes)
print >> sys.stderr, "A total of {0} contigs map to 80% of a reference"\
" transcript".format(len(goodctg80))
print >> sys.stderr, "A total of {0} contigs map to 50% of a reference"\
" transcript".format(len(goodctg50))
print >> sys.stderr, "A total of {0} reference transcripts ({1:.1f}%) have 80% covered" \
.format(len(goodref80), len(goodref80) * 100. / known_genes)
def expand(args):
"""
%prog expand bes.fasta reads.fastq
Expand sequences using short reads. Useful, for example for getting BAC-end
sequences. The template to use, in `bes.fasta` may just contain the junction
sequences, then align the reads to get the 'flanks' for such sequences.
"""
import math
from jcvi.formats.fasta import Fasta, SeqIO
from jcvi.formats.fastq import readlen, first, fasta
from jcvi.formats.blast import Blast
from jcvi.formats.base import FileShredder
from jcvi.apps.bowtie import align, get_samfile
from jcvi.apps.align import blast
p = OptionParser(expand.__doc__)
p.set_depth(depth=200)
p.set_firstN()
opts, args = p.parse_args(args)
if len(args) != 2:
sys.exit(not p.print_help())
bes, reads = args
size = Fasta(bes).totalsize
rl = readlen([reads])
expected_size = size + 2 * rl
nreads = expected_size * opts.depth / rl
nreads = int(math.ceil(nreads / 1000.)) * 1000
# Attract reads
samfile, logfile = align([bes, reads, "--reorder", "--mapped",
"--firstN={0}".format(opts.firstN)])
samfile, mapped, _ = get_samfile(reads, bes, bowtie=True, mapped=True)
logging.debug("Extract first {0} reads from `{1}`.".format(nreads, mapped))
pf = mapped.split(".")[0]
pf = pf.split("-")[0]
bespf = bes.split(".")[0]
reads = pf + ".expand.fastq"
first([str(nreads), mapped, "-o", reads])
# Perform mini-assembly
fastafile = reads.rsplit(".", 1)[0] + ".fasta"
qualfile = ""
if need_update(reads, fastafile):
fastafile, qualfile = fasta([reads])
contigs = op.join(pf, "454LargeContigs.fna")
if need_update(fastafile, contigs):
cmd = "runAssembly -o {0} -cpu 8 {1}".format(pf, fastafile)
sh(cmd)
assert op.exists(contigs)
# Annotate contigs
blastfile = blast([bes, contigs])
mapping = {}
for query, b in Blast(blastfile).iter_best_hit():
mapping[query] = b
f = Fasta(contigs, lazy=True)
annotatedfasta = ".".join((pf, bespf, "fasta"))
fw = open(annotatedfasta, "w")
keys = list(Fasta(bes).iterkeys_ordered()) # keep an ordered list
recs = []
for key, v in f.iteritems_ordered():
vid = v.id
if vid not in mapping:
continue
b = mapping[vid]
subject = b.subject
rec = v.reverse_complement() if b.orientation == '-' else v
rec.id = rid = "_".join((pf, vid, subject))
rec.description = ""
recs.append((keys.index(subject), rid, rec))
recs = [x[-1] for x in sorted(recs)]
SeqIO.write(recs, fw, "fasta")
fw.close()
FileShredder([samfile, logfile, mapped, reads, fastafile, qualfile, blastfile, pf])
logging.debug("Annotated seqs (n={0}) written to `{1}`.".\
format(len(recs), annotatedfasta))
return annotatedfasta
def loss(args):
"""
%prog loss a.b.i1.blocks [a.b-genomic.blast]
Extract likely gene loss candidates between genome a and b.
"""
p = OptionParser(loss.__doc__)
p.add_option("--bed",
default=False,
action="store_true",
help="Genomic BLAST is in bed format [default: %default]")
p.add_option("--gdist",
default=20,
type="int",
help="Gene distance [default: %default]")
p.add_option("--bdist",
default=20000,
type="int",
help="Base pair distance [default: %default]")
p.set_beds()
opts, args = p.parse_args(args)
if len(args) not in (1, 2):
sys.exit(not p.print_help())
blocksfile = args[0]
emptyblast = (len(args) == 1)
if emptyblast:
genomicblast = "empty.blast"
sh("touch {0}".format(genomicblast))
else:
genomicblast = args[1]
gdist, bdist = opts.gdist, opts.bdist
qbed, sbed, qorder, sorder, is_self = check_beds(blocksfile, p, opts)
blocks = []
fp = open(blocksfile)
genetrack = {}
proxytrack = {}
for row in fp:
a, b = row.split()
genetrack[a] = b
blocks.append((a, b))
data = []
for key, rows in groupby(blocks, key=lambda x: x[-1]):
rows = list(rows)
data.append((key, rows))
imax = len(data) - 1
for i, (key, rows) in enumerate(data):
if i == 0 or i == imax:
continue
if key != '.':
continue
before, br = data[i - 1]
after, ar = data[i + 1]
bi, bx = sorder[before]
ai, ax = sorder[after]
dist = abs(bi - ai)
if bx.seqid != ax.seqid or dist > gdist:
continue
start, end = range_minmax(((bx.start, bx.end), (ax.start, ax.end)))
start, end = max(start - bdist, 1), end + bdist
proxy = (bx.seqid, start, end)
for a, b in rows:
proxytrack[a] = proxy
tags = {}
if opts.bed:
bed = Bed(genomicblast, sorted=False)
key = lambda x: gene_name(x.accn.rsplit(".", 1)[0])
for query, bb in groupby(bed, key=key):
bb = list(bb)
if query not in proxytrack:
continue
proxy = proxytrack[query]
tag = "NS"
best_b = bb[0]
for b in bb:
hsp = (b.seqid, b.start, b.end)
if range_overlap(proxy, hsp):
tag = "S"
best_b = b
break
hsp = (best_b.seqid, best_b.start, best_b.end)
proxytrack[query] = hsp
tags[query] = tag
else:
blast = Blast(genomicblast)
for query, bb in blast.iter_hits():
bb = list(bb)
query = gene_name(query)
if query not in proxytrack:
continue
proxy = proxytrack[query]
tag = "NS"
best_b = bb[0]
for b in bb:
hsp = (b.subject, b.sstart, b.sstop)
if range_overlap(proxy, hsp):
tag = "S"
best_b = b
break
hsp = (best_b.subject, best_b.sstart, best_b.sstop)
proxytrack[query] = hsp
tags[query] = tag
for b in qbed:
accn = b.accn
target_region = genetrack[accn]
if accn in proxytrack:
target_region = region_str(proxytrack[accn])
if accn in tags:
ptag = "[{0}]".format(tags[accn])
else:
ptag = "[NF]"
target_region = ptag + target_region
print "\t".join((b.seqid, accn, target_region))
if emptyblast:
sh("rm -f {0}".format(genomicblast))
def rnaseq(args):
"""
%prog rnaseq blastfile ref.fasta
Evaluate de-novo RNA-seq assembly against a reference gene set (same or
closely related organism). Ideally blatfile needs to be supermap'd.
Following metric is used (Martin et al. 2010, Rnnotator paper):
Accuracy: % of contigs share >=95% identity with ref genome (TODO)
Completeness: % of ref genes covered by contigs to >=80% of their lengths
Contiguity: % of ref genes covered by a *single* contig >=80% of lengths
Chimer: % of contigs that contain two or more annotated genes >= 50bp
"""
from jcvi.algorithms.supermap import supermap
p = OptionParser(rnaseq.__doc__)
opts, args = p.parse_args(args)
if len(args) != 2:
sys.exit(p.print_help())
blastfile, reffasta = args
sizes = Sizes(reffasta).mapping
known_genes = len(sizes)
querysupermap = blastfile + ".query.supermap"
refsupermap = blastfile + ".ref.supermap"
if not op.exists(querysupermap):
supermap(blastfile, filter="query")
if not op.exists(refsupermap):
supermap(blastfile, filter="ref")
blast = Blast(querysupermap)
chimers = 0
goodctg80 = set()
goodctg50 = set()
for ctg, hits in blast.iter_hits():
bps = defaultdict(int)
for x in hits:
bps[x.subject] += abs(x.sstop - x.sstart) + 1
valid_hits = bps.items()
for vh, length in valid_hits:
rsize = sizes[vh]
ratio = length * 100. / rsize
if ratio >= 80:
goodctg80.add(ctg)
if ratio >= 50:
goodctg50.add(ctg)
# Chimer
if len(valid_hits) > 1:
chimers += 1
blast = Blast(refsupermap)
goodref80 = set()
goodref50 = set()
bps = defaultdict(int)
for x in blast.iter_line():
bps[x.subject] += abs(x.sstop - x.sstart) + 1
for vh, length in bps.items():
rsize = sizes[vh]
ratio = length * 100. / rsize
if ratio >= 80:
goodref80.add(vh)
if ratio >= 50:
goodref50.add(vh)
print >> sys.stderr, "Reference set: `{0}`, # of transcripts {1}".\
format(reffasta, known_genes)
print >> sys.stderr, "A total of {0} contigs map to 80% of a reference"\
" transcript".format(len(goodctg80))
print >> sys.stderr, "A total of {0} contigs map to 50% of a reference"\
" transcript".format(len(goodctg50))
print >> sys.stderr, "A total of {0} reference transcripts ({1:.1f}%) have 80% covered" \
.format(len(goodref80), len(goodref80) * 100. / known_genes)
