期刊
ANALYTICA CHIMICA ACTA
卷 1068, 期 -, 页码 111-119出版社
ELSEVIER
DOI: 10.1016/j.aca.2019.03.042
关键词
Methylproteome; Strong cation exchange; Immobilized metal ion affinity chromatography; High-pH reversed-phase chromatography; Lysine methylation identification
资金
- National Key R&D Program of China [2016YFA0501402, 2017YFA0505004]
- National Natural Science Foundation of China [21535008, 91753105, 21804131]
- National Science Fund of China for Distinguished Young Scholars [21525524]
Arginine/lysine methylation is an important post-translational modification (PTM) involved in DNA repairing, transcriptional regulation, etc. Immunoaffinity enrichment is currently the most widely used methods for the methylproteome analysis. Large-scale analysis of arginine methylation has been realized by using pan-R-methyl antibodies. Unfortunately, pan specific antibodies targeting all three lysine methylation forms are not available. In this study, we presented a novel chromatography-based enrichment method for global methylproteome analysis. The offline multidimensional tandem chromatography combining strong cation exchange (SCX) chromatography, immobilized metal ion affinity chromatography (IMAC) and high-pH reversed-phase chromatography (high-pH RP) was applied in the large-scale analysis of methylproteome. Totally, 860 forms on 765 sites were identified from BEL cells, covering all five arginine/lysine methylation forms. Among them, 27.21% were lysine methylation forms. This technique allows the simultaneous analysis of both arginine and lysine methylation while it has improved performance for the identification of lysine methylation. Therefore, it is a promising strategy for the investigation of biological functions related to methylation. (C) 2019 Elsevier B.V. All rights reserved.
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