def testAAS():
"""
@tests:
AASequence.__init__
AASequence.__add__
AASequence.__radd__
AASequence.__iadd__
AASequence.getCTerminalModification
AASequence.getNTerminalModification
AASequence.setCTerminalModification
AASequence.setModification
AASequence.setNTerminalModification
AASequence.setStringSequence
AASequence.toString
AASequence.toUnmodifiedString
"""
aas = pyopenms.AASequence()
aas + aas
aas += aas
aas.__doc__
aas = pyopenms.AASequence("DFPIANGER")
assert aas.getCTerminalModification() == ""
assert aas.getNTerminalModification() == ""
aas.setCTerminalModification("")
aas.setNTerminalModification("")
aas.setStringSequence("")
assert aas.toString() == ""
assert aas.toUnmodifiedString() == ""
def testPeptideHit():
"""
@tests:
PeptideHit.__init__
PeptideHit.addProteinAccession
PeptideHit.clearMetaInfo
PeptideHit.getAAAfter
PeptideHit.getAABefore
PeptideHit.getKeys
PeptideHit.getMetaValue
PeptideHit.getProteinAccessions
PeptideHit.getRank
PeptideHit.getScore
PeptideHit.getSequence
PeptideHit.isMetaEmpty
PeptideHit.metaValueExists
PeptideHit.removeMetaValue
PeptideHit.setAAAfter
PeptideHit.setAABefore
PeptideHit.setCharge
PeptideHit.setMetaValue
PeptideHit.setProteinAccessions
PeptideHit.setRank
PeptideHit.setScore
PeptideHit.setSequence
PeptideHit.__eq__
PeptideHit.__ge__
PeptideHit.__gt__
PeptideHit.__le__
PeptideHit.__lt__
PeptideHit.__ne__
"""
ph = pyopenms.PeptideHit()
assert ph == ph
assert not ph != ph
ph = pyopenms.PeptideHit(1.0, 1, 0, pyopenms.AASequence("A"))
_testMetaInfoInterface(ph)
ph.addProteinAccession("A")
assert ph.getProteinAccessions() == ["A"]
assert ph.getScore() == 1.0
assert ph.getRank() == 1
assert ph.getSequence().toString() == "A"
ph.setScore(2.0)
assert ph.getScore() == 2.0
ph.setRank(30)
assert ph.getRank() == 30
ph.setSequence(pyopenms.AASequence("AAA"))
assert ph.getSequence().toString() == "AAA"
ph.setAABefore('B')
assert ph.getAABefore() == "B"
ph.setAAAfter('C')
assert ph.getAAAfter() == 'C'
assert ph == ph
assert not ph != ph
def get_mass_diff(seq1, seq2):
"""
Compute the mass difference for both sequences.
"""
# full peptide, charge = 0
m1 = oms.AASequence(seq1).getMonoWeight(0, 0)
m2 = oms.AASequence(seq2).getMonoWeight(0, 0)
return(np.abs(m1-m2))
def annotate(spectra, identifications):
# TODO: Currently idXML returns index based spectrum reference instead of
# title based spectrum reference
# new_spectra = {}
for spectrum_index, spectrum in enumerate(spectra, 1):
spectrum_id = spectrum.identifier
if spectrum_index not in identifications:
# TODO: what if no ids was found?
continue
identification = identifications[spectrum_index]
sequence = pyopenms.AASequence().fromString(identification)
modifications = {}
# import pdb; pdb.set_trace()
sequence.size()
for residue_index in range(sequence.size()):
residue = sequence.getResidue(residue_index)
if residue.isModified():
delta_mass = residue.getModification().getDiffMonoMass()
modifications[residue_index] = delta_mass
spectrum.peptide = sequence.toUnmodifiedString().decode()
spectrum.modifications = modifications
# new_spectrum = sus.MsmsSpectrum(
# spectrum.identifier,
# spectrum.precursor_mz,
# spectrum.precursor_charge,
# spectrum.mz,
# spectrum.intensity,
# peptide=sequence.toUnmodifiedString().decode(),
# modifications=modifications
# )
# new_spectra[spectrum_id] = new_spectrum
return spectra
def simplisticBinnedScoring(self, phit, spectrum):
"""Simplistic phospho-scoring of a spectrum against a peptide hit.
This function enumerates all possible locations for the
phosphorylation and computes a similarity score between the
experimental spectrum and the theoretical spectrum for each
possibility.
"""
seq = phit.getSequence().toString()
seq = seq.replace("(Phospho)", "")
possibilities = []
spectrum_b = self.binSpectrum(spectrum)
charge = 1
# Iterate over all possible phosphosites
for m in re.finditer("[STY]", seq):
new_sequence = seq[:m.start() + 1] + "(Phospho)" + seq[m.start() -
1:]
new_aaseq = pyopenms.AASequence(new_sequence)
# Generate theoretical spectrum
spectrum_generator = pyopenms.TheoreticalSpectrumGenerator()
rs = pyopenms.RichMSSpectrum()
try:
spectrum_generator.addPeaks(rs, new_aaseq,
pyopenms.Residue.ResidueType.YIon,
charge)
spectrum_generator.addPeaks(rs, new_aaseq,
pyopenms.Residue.ResidueType.BIon,
charge)
except AttributeError:
# 1.11
spectrum_generator.addPeaks(rs, new_aaseq,
pyopenms.ResidueType.YIon, charge)
spectrum_generator.addPeaks(rs, new_aaseq,
pyopenms.ResidueType.BIon, charge)
theor = convertToMSSpectrum(rs)
theor_b = self.binSpectrum(theor)
# Compare theoretical spectrum to experimental spectrum
comp_score = self.compare_binnedSpectra(spectrum_b, theor_b)
possibilities.append([comp_score, new_aaseq])
# Sort the result by score, return the best scoring result
possibilities.sort(lambda x, y: -cmp(x[0], y[0]))
return possibilities[0]
def test_spectrum(self):
intensity = [100, 100, 100, 100, 100, 100, 100]
mz = [
#// four of the naked b/y ions
#// as well as one of the modified b and y ions ion each
350.17164, #// b
421.20875, #// b
421.20875 + 79.9657, #// b + P
547.26291, #// y
646.33133, #// y
809.39466 + 79.9657 #// y + P
]
spectrum = pyopenms.Spectrum()
spectrum.setMZArray(mz)
spectrum.setIntensityArray(intensity)
diascoring = pyopenms.DIAScoring()
diascoring.set_dia_parameters(
0.05, False, 30, 50, 4, 4
) #; // here we use a large enough window so that none of our peaks falls out
a = pyopenms.AASequence("SYVAWDR")
bseries_score = 0.0
yseries_score = 0.0
charge = 1
bseries_score, yseries_score = diascoring.dia_by_ion_score(
spectrum, a, charge, bseries_score, yseries_score)
self.assertAlmostEqual(bseries_score, 2.0)
self.assertAlmostEqual(yseries_score, 2.0)
# // now add a modification to the sequence
a.setModification(1, "Phospho") #; // modify the Y
bseries_score = 0
yseries_score = 0
bseries_score, yseries_score = diascoring.dia_by_ion_score(
spectrum, a, 1, bseries_score, yseries_score)
self.assertAlmostEqual(bseries_score, 1.0)
self.assertAlmostEqual(yseries_score, 3.0)
def testPeptideIdentification():
"""
@tests:
PeptideIdentification.__init__
PeptideIdentification.assignRanks
PeptideIdentification.clearMetaInfo
PeptideIdentification.empty
PeptideIdentification.getHits
PeptideIdentification.getIdentifier
PeptideIdentification.getKeys
PeptideIdentification.getMetaValue
PeptideIdentification.getNonReferencingHits
PeptideIdentification.getReferencingHits
PeptideIdentification.getScoreType
PeptideIdentification.getSignificanceThreshold
PeptideIdentification.insertHit
PeptideIdentification.isHigherScoreBetter
PeptideIdentification.isMetaEmpty
PeptideIdentification.metaValueExists
PeptideIdentification.removeMetaValue
PeptideIdentification.setHigherScoreBetter
PeptideIdentification.setHits
PeptideIdentification.setIdentifier
PeptideIdentification.setMetaValue
PeptideIdentification.setScoreType
PeptideIdentification.sort
PeptideIdentification.__eq__
PeptideIdentification.__ge__
PeptideIdentification.__gt__
PeptideIdentification.__le__
PeptideIdentification.__lt__
PeptideIdentification.__ne__
"""
pi = pyopenms.PeptideIdentification()
_testMetaInfoInterface(pi)
assert pi == pi
assert not pi != pi
ph = pyopenms.PeptideHit(1.0, 1, 0, pyopenms.AASequence("A"))
pi.insertHit(ph)
phx, = pi.getHits()
assert phx == ph
pi.setHits([ph])
phx, = pi.getHits()
assert phx == ph
assert isinstance(pi.getSignificanceThreshold(), float)
assert isinstance(pi.getScoreType(), str)
pi.setScoreType("A")
assert isinstance(pi.isHigherScoreBetter(), int)
assert isinstance(pi.getIdentifier(), str)
pi.setIdentifier("id")
pi.assignRanks()
pi.sort()
assert not pi.empty()
rv = []
pi.getReferencingHits("A", rv)
assert rv == []
pi.getNonReferencingHits("A", rv)
hit, = rv
assert hit.getSequence().toString() == "A"
assert hit.getScore() == 1.0
assert hit.getRank() == 1
rv = []
pi.getReferencingHits(["A"], rv)
assert rv == []
pi.getNonReferencingHits(["A"], rv)
hit, = rv
assert hit.getSequence().toString() == "A"
assert hit.getScore() == 1.0
assert hit.getRank() == 1
ph = pyopenms.ProteinHit()
pi.getReferencingHits([ph], rv)
hit, = rv
assert hit.getSequence().toString() == "A"
assert hit.getScore() == 1.0
assert hit.getRank() == 1
rv = []
pi.getNonReferencingHits([ph], rv)
hit, = rv
assert hit.getSequence().toString() == "A"
assert hit.getScore() == 1.0
assert hit.getRank() == 1
def main():
"""
Main function
"""
parser = argparse.ArgumentParser(
prog='bic_CSV.py',
formatter_class=argparse.RawDescriptionHelpFormatter,
description=textwrap.dedent('''\
---------------------------------------------------------------------
| Description: |
---------------------------------------------------------------------
Command line tool to convert BICEPS output to a .csv like format.
The default seperator are tabs ("\\t").
Explanations for all columns can be found on the github page
(http://buotex.github.io/BICEPS/doc/html/index.html).
---------------------------------------------------------------------
| Usage: |
---------------------------------------------------------------------
python BICEPS_TO_CSV.py --infile input.txt --outfile output.csv
=====================================================================
'''))
parser.add_argument(
'--in_oms',
metavar='in_oms',
type=str,
help='OpenMS output directory of the TextExporter node.',
required=True)
parser.add_argument(
'--in_bic',
metavar='in_bic',
type=str,
help=
'Input file/directory of the processed biceps results (.mut files)',
required=True)
parser.add_argument('--in_db',
metavar='in_db',
type=str,
help='protein database used for the --in_bic file',
required=True)
parser.add_argument('--CPV_tab',
metavar='CPV_tab',
type=str,
help='Table derived from CanProVar.',
default="")
parser.add_argument('--map_tab',
metavar='map_tab',
type=str,
help='Ensemble-Uniprot mapping data',
default="")
parser.add_argument('--out_aux',
metavar='out_aux',
type=str,
help='Outputfile for auxillary data files',
default="")
parser.add_argument('--min_diff',
metavar='min_diff',
type=float,
help='minimum mass difference between a AA mutation',
default=0.5)
args = parser.parse_args()
in_oms = args.in_oms
in_bic = args.in_bic
in_db = args.in_db
CPV_tab = args.CPV_tab
map_tab = args.map_tab
out_ax = args.out_aux
min_diff = args.min_diff
print ""
print "###################################################################"
print "# in_oms: %s" % in_oms
print "# in_bic: %s" % in_bic
print "# in_db: %s" % in_db
print "#"
print "# out dir: %s" % out_ax
print "###################################################################"
print ""
if not os.path.exists(out_ax):
print "%s created!" % out_ax
os.makedirs(out_ax)
#==========================================================================
# start analysis workflow
#==========================================================================
# in_oms = "/home/sven/data/BICEPS/HeLa/OMS_results2/TOPPAS_out/011-TextExporter-out/"
# in_bic = "/home/sven/data/BICEPS/HeLa/results/"
# in_db = '/home/sven/data/BICEPS/fasta/HS_reviewed_19092014.fasta'
# CPV_tab = "/home/sven/data/BICEPS/var_dbs/Ensembl54_homo_cancer_dbSNP_variation_protein.fasta"
# map_tab = "/home/sven/data/BICEPS/var_dbs/ensemble_uniprot_mapping_canprovar.tab"
# out_ax = "/home/sven/data/BICEPS/HCT/results/HCT1/out/"
print "load fasta files...",
canprovar_df = CanProVar_to_table(CPV_tab, out_ax)
mapping_dictionary = uniprot_mapping(map_tab)
uniprot_dic = BICl.read_uniprot_to_dic(in_db, mode="seq")
print "DONE!"
oms_files = sorted(glob.glob(in_oms + "SAAV_candidates*.csv"))
bic_files = sorted(glob.glob(in_bic + "*.txt.mut"))
fdr_c = []
basename = []
snp_id = []
snp_protein = []
snps_db = []
ensemble_protein_list = []
bic_snps = []
oms_in_vardb = []
print "CSV\tDB\tOMS_in_BIC\tOMS_input\tOMS_out\tOMS_unique"
for oms_in, bic_in in zip(oms_files, bic_files):
db_lists = []
#datastrucutres to store the mutations that are confirmed
validated_identifier = []
validated_sequence = []
validated_tag = []
validated_identifier_ens = []
accepted_oms = []
mass_diff = []
temp_snps = []
basename_oms = os.path.basename(oms_in)
basename_bic = os.path.basename(bic_in)
seq_dic, bic_mut_dic, bic_mut_tag_dic = read_biceps_log(bic_in)
list_peps = []
c = 0
print basename_oms,
print basename_bic,
oms_results = pd.read_csv(oms_in, sep="\t")
oms_results["unmod_sequence"] = [
oms.AASequence(seqi).toUnmodifiedString()
for seqi in oms_results["sequence"]
]
oms_results["single_uniprot"] = [
BICl.get_uniprot(acci).replace("_MUT", "")
for acci in oms_results["accessions"]
]
for seqi, uniproti in zip(oms_results["unmod_sequence"],
oms_results["accessions"]):
uniprot_ids_all = [
BICl.get_uniprot(i).replace("_MUT", "")
for i in uniproti.split(";") if i.count("|") >= 2
]
# test if openms id in biceps results
if seqi in bic_mut_dic:
intersection_oms = np.unique(
np.intersect1d(uniprot_ids_all, [
uniprot_ids_seqi
for uniprot_ids_seqi in bic_mut_dic[seqi].keys()
]))
if len(intersection_oms) >= 1:
c += 1
accepted_oms.append(True)
for item in intersection_oms:
tag = create_mutation_tag(item, seq_dic[seqi], seqi,
uniprot_dic)
validated_identifier.append(item)
validated_sequence.append(seqi)
validated_tag.append(tag)
try:
validated_identifier_ens.append(
mapping_dictionary[item])
except:
validated_identifier_ens.append("N.A")
list_peps.append(seq_dic[seqi].keys())
mass_diff.append(
BICp.get_mass_diff(seqi, seq_dic[seqi].keys()[0]))
else:
accepted_oms.append(False)
list_peps.append("")
mass_diff.append(0)
else:
accepted_oms.append(False)
list_peps.append("")
mass_diff.append(0)
# test if openms variation DB
for uniprot_idi in uniprot_ids_all:
if uniprot_idi in bic_mut_tag_dic:
pass
else:
#probably a mutation with 2 residues
continue
if uniprot_idi in mapping_dictionary:
ensemble_ids_temp = mapping_dictionary[uniprot_idi][
0].split(",")
for e_id in ensemble_ids_temp:
try:
# get more than ONE snp and transform to set
gt_snps = canprovar_df.loc[e_id][
"native_id"].values
except:
# get more ONE snp and transform to set
gt_snps = [canprovar_df.loc[e_id]["native_id"]]
if len(gt_snps) != 1:
sys.exit("Wrong with the number of snps...")
#compare to BICEPS results
intersection = np.intersect1d(
adjust_mutation_position(
bic_mut_tag_dic[uniprot_idi]), gt_snps)
if len(intersection) != 0:
db_lists.append(
(e_id, ";".join(intersection), uniprot_idi))
temp_snps.extend(np.hstack(intersection))
snp_id.extend(intersection)
snp_protein.append(uniprot_idi)
ensemble_protein_list.append(e_id)
c += 1
print c,
snps_db.append(np.unique(temp_snps))
fdr_c.append(c)
basename.append(basename_oms)
bic_snps.append(len(bic_mut_dic))
oms_results["isBIC"] = accepted_oms
oms_results["orig_seq"] = list_peps
oms_results["mass_diff"] = mass_diff
print oms_results.shape[0],
oms_filtered = oms_results[(oms_results["isBIC"] == True)
& (oms_results["mass_diff"] >= min_diff)]
print oms_filtered.shape[0],
oms_filtered.to_csv(out_ax + basename_oms +
"_peptide_identifications.csv")
print len(np.unique(oms_filtered["unmod_sequence"]))
#create Provean data
validated_df = pd.DataFrame()
validated_df["identifier_uni"] = validated_identifier
validated_df["identifier_ens"] = [
i[0] if len(i) == 1 else i for i in validated_identifier_ens
]
validated_df["sequence"] = validated_sequence
validated_df["tag"] = validated_tag
validated_df.sort("identifier_uni", inplace=True)
validated_df.drop_duplicates(inplace=True)
write_to_provean_format(validated_df,
out_ax + basename_oms + "_provean.csv",
mass_filter=min_diff)
#database variants
df_vaars = pd.DataFrame()
df_vaars["ensembl_id"] = [i[0] for i in db_lists]
df_vaars["mutation_tags"] = [i[1] for i in db_lists]
df_vaars["uniprot"] = [i[2] for i in db_lists]
df_vaars = df_vaars.drop_duplicates()
df_vaars.to_csv(out_ax + basename_oms + "_SNPs_canprovar.csv",
sep="\t")
#summary data frame for all files
res_df = pd.DataFrame()
res_df["SNPs_OMS"] = fdr_c
res_df["SNPs_DB"] = [len(i) for i in snps_db]
res_df["SNPs_BIC"] = bic_snps
res_df["OMS_base"] = basename
res_df["OMS"] = oms_files
res_df["BIC"] = bic_files
res_df.to_csv(out_ax + "SNPs_overview.csv", sep="\t")
def score(self, phit, spectrum):
nr_sites = phit.getSequence().toString().count("Phospho")
if nr_sites != 1:
return [-1, pyopenms.AASequence()]
return self.simplisticBinnedScoring(phit, spectrum)
