Bioorthogonal chemical reporters for monitoring protein acetylation.
Bioorthogonal chemical reporters for monitoring protein acetylation.
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DOI:
10.1021/ja908871t
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发表时间:
2010-03-24
影响因子:
15
通讯作者:
Hang, Howard C.
中科院分区:
文献类型:
--
作者:
Yang, Yu-Ying;Ascano, Janice M.;Hang, Howard C.
Protein acetylation is a key post-translational modification that regulates diverse biological activities in eukaryotes. Here we report bioorthogonal chemical reporters that enable direct in-gel fluorescent visualization and proteome-wide identification of acetylated proteins via Cu(I)-catalyzed azide−alkyne cycloaddition, often termed “click chemistry”. We demonstrate that two alkynyl-acetyl-CoA analogues, 4-pentynoyl-CoA and 5-hexynoyl-CoA, function as efficient substrates of lysine acetyltransferase p300 and serve as sensitive reagents for monitoring p300-catalyzed protein acetylation in vitro. In addition, we demonstrate that three alkynylacetate analogues, sodium 3-butynoate, sodium 4-pentynoate, and sodium 5-hexynoate, can be metabolically incorporated onto cellular proteins through biosynthetic mechanisms for profiling of acetylated proteins in diverse cell types. Mass spectrometry analysis of the enriched 4-pentynoate-labeled proteins revealed many reported as well as new candidate acetylated proteins from Jurkat T cells and specific sites of lysine acetylation. The bioorthogonal chemical reporters described here should serve as powerful tools for investigating protein acetylation.
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