Global profiling of lysine reactivity and ligandability in the human proteome.

Global profiling of lysine reactivity and ligandability in the human proteome.
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DOI:
10.1038/nchem.2826
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发表时间:
2017-12
期刊:
影响因子:
21.8
通讯作者:
Cravatt BF
Cravatt BF
中科院分区:
化学1区
文献类型:
--
作者:
Hacker SM;Backus KM;Lazear MR;Forli S;Correia BE;Cravatt BF

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Nucleophilic amino acids make important contributions to protein function, including performing key roles in catalysis and serving as sites for post-translational modification. Electrophilic groups that target amino-acid nucleophiles have been used to create covalent ligands and drugs, but have, so far, been mainly limited to cysteine and serine. Here we report a chemical proteomic platform for the global and quantitative analysis of lysine residues in native biological systems. We quantified, in total, more than 9000 lysines in human cell proteomes and identified several hundred residues with heightened reactivity that are enriched at protein functional sites and can frequently be targeted by electrophilic small molecules. We discovered lysine-reactive fragment electrophiles that inhibit enzymes by active site and allosteric mechanisms, as well as disrupt protein-protein interactions in transcriptional regulatory complexes, emphasizing the broad potential and diverse functional consequences of liganding lysine residues throughout the human proteome.
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