MASCOT Search Results

Search metadata
User : Jennifer
E-mail : [email protected]
Search title : Andy1
MS data file : PRT1311_JBEI_1.mgf
Database : Ecoli-MetEng 20200720 (4,900 sequences; 1,661,431 residues)
Timestamp : 8 Sep 2025 at 17:17:19 GMT
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Search parameters
Type of search : MS/MS Ion Search
Enzyme : GluC_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 : 4,450

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 > 19 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 11–14 (out of 14)


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-11

Accession Score Description
1 BTUF_ECOLI 23 Vitamin B12-binding protein OS=Escherichia coli (strain K12) GN=btuF PE=1 SV=2
Score Mass Matches Sequences emPAI
11.1 BTUF_ECOLI 23 29463 2 (1) 1 (1) 0.08
Vitamin B12-binding protein OS=Escherichia coli (strain K12) GN=btuF PE=1 SV=2
2 samesets of BTUF_ECOLI
NANE_ECOLI 23 24344 2 (1) 1 (1) 0.10
Putative N-acetylmannosamine-6-phosphate 2-epimerase OS=Escherichia coli (strain K12) GN=nanE PE=1 SV=1
RS12_ECOLI 23 13957 2 (1) 1 (1) 0.17
30S ribosomal protein S12 OS=Escherichia coli (strain K12) GN=rpsL PE=1 SV=2

-2 peptide matches (1 non-duplicate, 1 duplicate)

Query Dupes Observed Mr(expt) Mr(calc) ppm  M Score Expect Rank U Peptide
3145 +1 785.4618 784.4545 784.4555 -1.25 0 23 0.021 +1Score > 19 indicates identity U E.QIANALR.Q

+12

Accession Score Description
1 MURC_ECOLI 23 description

+13

Accession Score Description
1 YCBK_ECOLI 21 Uncharacterized protein YcbK OS=Escherichia coli (strain K12) GN=ycbK PE=4 SV=1

+14

Accession Score Description
1 K1C10_HUMAN 18 Keratin, type I cytoskeletal 10 OS=Homo sapiens GN=KRT10 PE=1 SV=6
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