The DOI matches its Crossref record; 20 of the 20 references it cites were found in a registry or an index.
Global proteomic profiling of phosphopeptides using electron transfer dissociation tandem mass spectrometry
Open accessAbstract
Electron transfer dissociation (ETD) is a recently introduced mass spectrometric technique that provides a more comprehensive coverage of peptide sequences and posttranslational modifications. Here, we evaluated the use of ETD for a global phosphoproteome analysis. In all, we identified a total of 1,435 phosphorylation sites from human embryonic kidney 293T cells, of which 1,141 (≈80%) were not previously described. A detailed comparison of ETD and collision-induced dissociation (CID) modes showed that ETD identified 60% more phosphopeptides than CID, with an average of 40% more fragment ions that facilitated localization of phosphorylation sites. Although our data indicate that ETD is superior to CID for phosphorylation analysis, the two methods can be effectively combined in alternating ETD and CID modes for a more comprehensive analysis. Combining ETD and CID, from this single study, we were able to identify 80% of the known phosphorylation sites in >1,000 phosphorylated peptides analyzed. A hierarchical clustering of the identified phosphorylation sites allowed us to discover 15 phosphorylation motifs that have not been reported previously. Overall, ETD is an excellent method for localization of phosphorylation sites and should be an integral component of any strategy for comprehensive phosphorylation analysis.
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Cites
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Cited by
Protein Analysis by Shotgun/Bottom-up Proteomics
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Extensive Crosstalk Between O-GlcNAcylation and Phosphorylation Regulates Cytokinesis
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Metadata
- Authors
- Molina, H., Horn, D. M., Tang, N., Mathivanan, S., & Pandey, A.
- Venue
- Proceedings of the National Academy of Sciences
- Published
- 2007-02-13
- Volume
- 104
- Issue
- 7
- Pages
- 2199-2204
- ISSN
- 0027-8424 (ISSN-L)
- 1091-6490
- OpenAlex
- W1996810566
- Cited by
- 502
- References
- 20
- FWCI
- 27.30
- Type
- journal article
- Language
- en
- Open access
- green
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