1. Proteome-wide Prediction of Lysine Methylation Leads to Identification of H2BK43 Methylation and Outlines the Potential Methyllysine Proteome.
- Author
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Biggar KK, Charih F, Liu H, Ruiz-Blanco YB, Stalker L, Chopra A, Connolly J, Adhikary H, Frensemier K, Hoekstra M, Galka M, Fang Q, Wynder C, Stanford WL, Green JR, and Li SS
- Subjects
- Algorithms, Amino Acid Sequence, Animals, Cell Differentiation, Demethylation, Female, Histones chemistry, Humans, Jumonji Domain-Containing Histone Demethylases metabolism, MCF-7 Cells, Methylation, Mice, Mouse Embryonic Stem Cells cytology, Mouse Embryonic Stem Cells metabolism, Neurons cytology, Nuclear Proteins metabolism, Repressor Proteins metabolism, Software, Substrate Specificity, Histones metabolism, Lysine metabolism, Proteome metabolism
- Abstract
Protein Lys methylation plays a critical role in numerous cellular processes, but it is challenging to identify Lys methylation in a systematic manner. Here we present an approach combining in silico prediction with targeted mass spectrometry (MS) to identify Lys methylation (Kme) sites at the proteome level. We develop MethylSight, a program that predicts Kme events solely on the physicochemical properties of residues surrounding the putative methylation sites, which then requires validation by targeted MS. Using this approach, we identify 70 new histone Kme marks with a 90% validation rate. H2BK43me2, which undergoes dynamic changes during stem cell differentiation, is found to be a substrate of KDM5b. Furthermore, MethylSight predicts that Lys methylation is a prevalent post-translational modification in the human proteome. Our work provides a useful resource for guiding systematic exploration of the role of Lys methylation in human health and disease., Competing Interests: Declaration of Interests The authors declare no competing interests., (Copyright © 2020 The Author(s). Published by Elsevier Inc. All rights reserved.)
- Published
- 2020
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