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YcgC represents a new protein deacetylase family in prokaryotes
Journal article   Open access   Peer reviewed

YcgC represents a new protein deacetylase family in prokaryotes

Shun Tu, Shu-Juan Guo, Chien-Sheng Chen, Cheng-Xi Liu, He-Wei Jiang, Feng Ge, Jiao-Yu Deng, Yi-Ming Zhou, Daniel M Czajkowsky, Yang Li, …
eLife, v 4(2015)
30 Dec 2015
PMID: 26716769
url
https://doi.org/10.7554/elife.05322View
Published, Version of Record (VoR) Open
url
https://doi.org/10.7554/eLife.05322View
Published, Version of Record (VoR) Open

Abstract

Amidohydrolases - metabolism Escherichia coli - enzymology Escherichia coli Proteins - genetics Escherichia coli Proteins - metabolism Lysine - metabolism Protein Processing, Post-Translational Substrate Specificity Transcription Factors - metabolism
Reversible lysine acetylation is one of the most important protein posttranslational modifications that plays essential roles in both prokaryotes and eukaryotes. However, only a few lysine deacetylases (KDACs) have been identified in prokaryotes, perhaps in part due to their limited sequence homology. Herein, we developed a 'clip-chip' strategy to enable unbiased, activity-based discovery of novel KDACs in the Escherichia coli proteome. In-depth biochemical characterization confirmed that YcgC is a serine hydrolase involving Ser200 as the catalytic nucleophile for lysine deacetylation and does not use NAD(+) or Zn(2+) like other established KDACs. Further, in vivo characterization demonstrated that YcgC regulates transcription by catalyzing deacetylation of Lys52 and Lys62 of a transcriptional repressor RutR. Importantly, YcgC targets a distinct set of substrates from the only known E. coli KDAC CobB. Analysis of YcgC's bacterial homologs confirmed that they also exhibit KDAC activity. YcgC thus represents a novel family of prokaryotic KDACs.

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Biology
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