Modification-specific proteomics: strategies for characterization of post-translational modifications using enrichment techniques.
More than 300 different types of protein post-translational modifications (PTMs) have been described, many of which are known to have pivotal roles in cellular physiology and disease. Nevertheless, only a handful of PTMs have been extensively investigated at the proteome level. Knowledge of protein substrates and their PTM sites is key to dissection of PTM-mediated cellular processes. The past several years have seen a tremendous progress in developing MS-based proteomics technologies for global PTM analysis, including numerous studies of yeast and other microbes. Modification-specific enrichment techniques combined with advanced MS/MS methods and computational data analysis have revealed a surprisingly large extent of PTMs in proteins, including multi-site, cooperative modifications in individual proteins. We review some of the current strategies employed for enrichment and detection of PTMs in modification-specific proteomics.
Zhao
Yingming
Y
The Ben May Department for Cancer Research, The University of Chicago, Chicago, IL, USA. Yingming.Zhao@uchicago.edu
Jensen
Ole N
ON
D000818:Animals; D006801:Humans; D013058:Mass Spectrometry; D011499:Protein Processing, Post-Translational; D040901:Proteomics / Q000379:methods*; D013379:Substrate Specificity