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ProteinProphet

Felipe da Veiga Leprevost edited this page Feb 25, 2019 · 3 revisions

Statistical validation of protein identification based on peptide assignment to MS/MS spectra

Version

ProteinProphet v5.01

Usage

philosopher proteinprophet [flags] [files]

Flags

--accuracy

Equivalent to MINPROB0.

--allpeps

Consider all possible peptides in the database in the confidence model.

--asap

Compute ASAP ratios for protein entries (ASAP must have been run previously on interact dataset).

--asapprophet

Compute ASAP ratios for protein entries (ASAP must have been run previously on all input interact datasets with mz/XML raw data format).

--confem

Use the EM to compute probability given the confidence.

--delude

Do NOT use peptide degeneracy information when assessing proteins.

--maxppmdiff

Maximum peptide mass difference in PPM (default 20)

--fpkm

Model protein FPKM values.

--glyc

Highlight peptide N-glycosylation motif.

--icat

Highlight peptide cysteines.

--instances

Use Expected Number of Ion Instances to adjust the peptide probabilities prior to NSP adjustment.

--iprophet

Input is from iProphet.

--logprobs

Use the log of the probabilities in the Confidence calculations.

--minindep

Minimum percentage of independent peptides required for a protein (default=0).

--minprob

PeptideProphet probability threshold (default=0.05).

--mufactor

Fudge factor to scale MU calculation (default 1).

--nogroupwts

Check peptide's Protein weight against the threshold (default: check peptide's Protein Group weight against threshold).

--nooccam

Non-conservative maximum protein list.

--noprotlen

Do not report protein length.

--normprotlen

Normalize NSP using Protein Length.

--output

Output name (default "interact.prot.xml").

--protmw

Get protein mol weights.

--refresh

Import manual changes to AAP ratios (after initially using ASAP option).

--softoccam

Peptide weights are apportioned equally among proteins within each Protein Group (less conservative protein count estimate).

--unmapped

Report results for UNMAPPED proteins.

Example

Execute a standard analysis on a pepXML file called sample.pepxml.

philosopher proteinprophet sample.pepxml

FAQ

Do I need TPP installed for running this ?

No