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Status of Large-scale Analysis of Post-translational Modifications by Mass Spectrometry

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Olsen, Jesper V., Mann, Matthias·2013·Molecular & Cellular Proteomics

Abstract

Cellular function can be controlled through the gene expression program, but often protein post-translational modifications (PTMs) provide a more precise and elegant mechanism. Key functional roles of specific modification events--for instance, during the cell cycle--have been known for decades, but only in the past 10 years has mass-spectrometry-(MS)-based proteomics begun to reveal the true extent of the PTM universe. In this overview for the special PTM issue of Molecular and Cellular Proteomics, we take stock of where MS-based proteomics stands in the large-scale analysis of protein modifications. For many PTMs, including phosphorylation, ubiquitination, glycosylation, and acetylation, tens of thousands of sites can now be confidently identified and localized in the sequence of the protein. The quantification of PTM levels between different cellular states is likewise established, with label-free methods showing particular promise. It is also becoming possible to determine the absolute occupancy or stoichiometry of PTM sites on a large scale. Powerful software for the bioinformatic analysis of thousands of PTM sites has been developed. However, a complete inventory of sites has not been established for any PTM, and this situation will persist into the foreseeable future. Furthermore, although PTM coverage by MS-based methods is impressive, it still needs to be improved, especially in tissues and in clinically relevant systems. The central challenge for the field is to develop streamlined methods for determining biological functions for the myriad of modifications now known to exist.

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Metadata

Authors
Olsen, J. V., & Mann, M.
Venue
Molecular & Cellular Proteomics
Publisher
Elsevier BV
Published
2013-12
Volume
12
Issue
12
Pages
3444-3452
ISSN
1535-9476 (ISSN-L)
OpenAlex
W2103174201
Cited by
591
References
13
FWCI
26.84
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: Status of Large-scale Analysis of Post-translational Modifications by Mass Spectrometry. https://app.cochat.ai/papers/10.1074/mcp.o113.034181
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Olsen, J. V., & Mann, M. (2013). Status of Large-scale Analysis of Post-translational Modifications by Mass Spectrometry. Molecular & Cellular Proteomics. https://doi.org/10.1074/mcp.o113.034181

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