Journal
MOLECULAR SYSTEMS BIOLOGY
Volume 8, Issue -, Pages -Publisher
WILEY
DOI: 10.1038/msb.2012.31
Keywords
post-translational modifications; protein regulation; proteomics; PTM code; PTM crosstalk
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Funding
- EOI fellowship from Spanish Ministry of Science and Innovation
- Marie Curie IEF fellowship (VII Framework Program)
- EMBL
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Various post-translational modifications (PTMs) fine-tune the functions of almost all eukaryotic proteins, and co-regulation of different types of PTMs has been shown within and between a number of proteins. Aiming at a more global view of the interplay between PTM types, we collected modifications for 13 frequent PTM types in 8 eukaryotes, compared their speed of evolution and developed a method for measuring PTM co-evolution within proteins based on the co-occurrence of sites across eukaryotes. As many sites are still to be discovered, this is a considerable underestimate, yet, assuming that most co-evolving PTMs are functionally associated, we found that PTM types are vastly interconnected, forming a global network that comprise in human alone >50 000 residues in about 6000 proteins. We predict substantial PTM type interplay in secreted and membrane-associated proteins and in the context of particular protein domains and short-linear motifs. The global network of co-evolving PTM types implies a complex and intertwined post-translational regulation landscape that is likely to regulate multiple functional states of many if not all eukaryotic proteins. Molecular Systems Biology 8: 599; published online 17 July 2012; doi:10.1038/msb.2012.31
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