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| PROJECT OVERVIEW
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The SRMAtlas is a compendium of targeted proteomics assays to detect and quantify proteins in complex proteome digests by mass spectrometry. It results from high-quality measurements of natural and synthetic peptides conducted on a triple quadrupole mass spectrometer, and is intended as a resource for selected/multiple reaction monitoring (SRM/MRM)-based proteomic workflows.
Users can currently query transitions from Yeast, Human, and Mouse. The yeast library is based on both natural samples and synthetic pepides run on a 4000 QTRAP instrument, supplemented with ion-trap observations and predictions, where QQQ spectra are not available.
We provide a web-interace and command-line tools which allow users to query these assays. The optimal coordinates for establishing an SRM assay can be readily exported and uploaded to the SRM/MRM method of a triple quadrupole mass spectrometer. The assays can then be used to detect and quantify at high-throughput deliberately chosen set of target proteins in any biological sample of interest.
Background information:
SRM/MRM assays for targeted proteomic analysis
SRM/MRM:definitions and nomenclature
Publicly available today
The database of SRM transitions is currently built from the following data sources, summaries are by the number of proteins covered by QQQ spectra, just ion trap spectra, and supplemental predictions in the absence of real spectra:
Yeast - QQQ: 1493 proteins, IT: 2241 proteins, predictions: 2935 proteins
Human - QQQ: 0 proteins, IT: 10,435 proteins, predictions: 9833 proteins
Mouse - QQQ: 0 proteins, IT: 6531 proteins, predictions: 9613 proteins
Coming Soon!
The database will soon be expanded to include QQQ observations for most proteins in all three organisms, as detailed below.
Yeast - 25K peptides, ~6400 proteins ~97% proteome coverage*
Human - 100K peptides, ~19,000 proteins, ~95% proteome coverage*
Mouse - 60K peptides, ~12,000 proteins, ~55% proteome coverage*
Human Glyco - 7K peptides, ~3,000 proteins
*Proteome coverage calculated based on particluar target proteome:
Yeast, SGD (2009-10)
Human, Uniprot/SwissProt (2010-05)
Mouse, Uniprot/SwissProt (2010-05)
The original MRMAtlas as published by Picotti et al. (2008) including QQQ spectra from 1500 yeast proteins from natural samples has been replaced by this expanded resource, which includes the original data and more. The original web site may still be accessed here.
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SRMAtlas |
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