MASCOT Search Results

Search metadata
User : Jennifer
E-mail : [email protected]
Search title : 1
MS data file : PRT1249__1.mgf
Database : Ecoli-MetEng 20200720 (4,898 sequences; 1,660,463 residues)
Timestamp : 23 Jun 2025 at 17:44:49 GMT
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Search parameters
Type of search : MS/MS Ion Search
Enzyme : Trypsin
Fixed modifications : Carbamidomethyl (C)
Variable modifications : Deamidated (NQ), Oxidation (M)
Mass values : Monoisotopic
Protein mass : Unrestricted
Peptide mass tolerance : ± 20 ppm
Fragment mass tolerance : ± 0.1 Da
Max missed cleavages : 1
Instrument type : ESI-FTICR
Number of queries : 4,592

Score distribution

Peptide score distribution

Peptide score distribution. Ions score is −10log(P), where P is the probability that the observed match is a random event. Individual ions scores > 17 indicate identity or extensive homology (p<0.05).

Protein score distribution for the first 50 proteins

[Deprecated] Score distribution for family members in the first 50 proteins. Protein scores are derived from ions scores as a non-probabilistic basis for ranking protein families.

Legend
Dupes Expect Rank U 1 2 Peptide
0.037 +2 GAYSLSLR significant
9 +1 GFFLFVEGGR top ranking
6.4e-005 +1 GSSIFGLAPGK significant and top ranking
1.3e-006 +1 X SSGTSYPDVLK peptide is found in all proteins in family member 1
6.2e-007 +1 / VCNYVSWIK peptide is found in some but not all proteins in family member 2
6.4e-005 +1 U GSSIFGLAPGK unique
+2 5.7e-005 +1 LNTLETEEWFFK peptide has two duplicates
0.18 +1 LNTLETEEWFFK duplicate peptide

Right-facing triangle (+) in the Dupes or Rank column indicates content that can be expanded by clicking on it. Down-facing triangle (-) indicates the content is expanded and can be collapsed. For more details about particular columns, see results format help.

Protein Family Summary

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Protein families 1–10 (out of 35)


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+1

Accession Score Description
1 Q9EX54_STRCO 4154 Putative type I polyketide synthase OS=Streptomyces coelicolor (strain ATCC BAA-471 / A3(2) / M145) OX=100226 GN=SCO6273 PE=4 SV=1

+2

Accession Score Description
Family member distances as a dendrogram 1 K2C1_HUMAN 196 Keratin, type II cytoskeletal 1 OS=Homo sapiens GN=KRT1 PE=1 SV=6
2 K22E_HUMAN 114 Keratin, type II cytoskeletal 2 epidermal OS=Homo sapiens GN=KRT2 PE=1 SV=2

+3

Accession Score Description
1 TRYP_PIG 188 Trypsin OS=Sus scrofa PE=1 SV=1

+4

Accession Score Description
1 EFTU1_ECOLI 168 Elongation factor Tu 1 OS=Escherichia coli (strain K12) GN=tufA PE=1 SV=1

+5

Accession Score Description
Family member distances as a dendrogram 1 K1C10_HUMAN 145 Keratin, type I cytoskeletal 10 OS=Homo sapiens GN=KRT10 PE=1 SV=6
2 K1C9_HUMAN 101 Keratin, type I cytoskeletal 9 OS=Homo sapiens GN=KRT9 PE=1 SV=3

-6

Accession Score Description
1 RS1_ECOLI 97 30S ribosomal protein S1 OS=Escherichia coli (strain K12) GN=rpsA PE=1 SV=1
Score Mass Matches Sequences emPAI
6.1 RS1_ECOLI 97 61235 9 (5) 4 (3) 0.23
30S ribosomal protein S1 OS=Escherichia coli (strain K12) GN=rpsA PE=1 SV=1

-9 peptide matches (6 non-duplicate, 3 duplicate)

Query Dupes Observed Mr(expt) Mr(calc) ppm  M Score Expect Rank U Peptide
2548 +1 665.3539 664.3466 664.3432 5.20 0 22 0.013 +7Score > 16 indicates identity U K.ELEFK.V
2549 +2 333.1808 664.3470 664.3432 5.84 0 12 0.15 +3Score > 16 indicates identity U K.ELEFK.V
3650   775.4016 1548.7886 1548.7784 6.63 0 44 0.00016 +1Score > 19 indicates identity U K.GATVELADGVEGYLR.A
D:\Xcalibur\Data\Jennifer\20250522 PRT1249 Qingyun\PRT1249__1.raw

Score > 19 indicates identity

4174   710.7042 2129.0908 2129.0562 16.2 0 36 0.001 -1Score > 19 indicates identity U K.VVNVGDVVEVMVLDIDEER.R + Deamidated (NQ)
10.4 1 20 0.045 2 VEANEMPGNKIGLLNVHHR   + 2 Deamidated (NQ)
10.4 1 20 0.045 2 VEANEMPGNKIGLLNVHHR   + 2 Deamidated (NQ)
8.43 1 4 1.7 4 AVKVAFVFSGQGTQYPGMAR   + Oxidation (M)
-2.65 1 1 3.2 5 KTAGVLGDDLSLNAQQVSGVR   + 2 Deamidated (NQ)
-2.65 1 1 3.2 5 KTAGVLGDDLSLNAQQVSGVR   + 2 Deamidated (NQ)
4175   1065.5533 2129.0920 2129.0562 16.8 0 46 9.7e-005 +1Score > 19 indicates identity U K.VVNVGDVVEVMVLDIDEER.R + Deamidated (NQ)
4468   1191.5579 3571.6519 3571.6011 14.2 0 8 0.49 +1Score > 18 indicates identity U R.VTNLTDYGCFVEIEEGVEGLVHVSEMDWTNK.N + 2 Deamidated (NQ)

+7

Accession Score Description
1 RL4_ECOLI 65 50S ribosomal protein L4 OS=Escherichia coli (strain K12) GN=rplD PE=1 SV=1

+8

Accession Score Description
1 ISPA_ECOLI 58 Farnesyl diphosphate synthase OS=Escherichia coli (strain K12) GN=ispA PE=1 SV=1

+9

Accession Score Description
1 GLPB_ECOLI 44 Anaerobic glycerol-3-phosphate dehydrogenase subunit B OS=Escherichia coli (strain K12) GN=glpB PE=1 SV=1

+10

Accession Score Description
1 RL7_ECOLI 42 50S ribosomal protein L7/L12 OS=Escherichia coli (strain K12) GN=rplL PE=1 SV=2
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