The essential M. tuberculosis Clp protease is functionally asymmetric in vivo.
The essential M. tuberculosis Clp protease is functionally asymmetric in vivo.
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DOI:
10.1126/sciadv.abn7943
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发表时间:
2022-05-06
期刊:
影响因子:
13.6
通讯作者:
中科院分区:
文献类型:
--
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The Clp protease system is a promising, noncanonical drug target against Mycobacterium tuberculosis (Mtb). Unlike in Escherichia coli, the Mtb Clp protease consists of two distinct proteolytic subunits, ClpP1 and ClpP2, which hydrolyze substrates delivered by the chaperones ClpX and ClpC1. While biochemical approaches uncovered unique aspects of Mtb Clp enzymology, its essentiality complicates in vivo studies. To address this gap, we leveraged new genetic tools to mechanistically interrogate the in vivo essentiality of the Mtb Clp protease. While validating some aspects of the biochemical model, we unexpectedly found that only the proteolytic activity of ClpP1, but not of ClpP2, is essential for substrate degradation and Mtb growth and infection. Our observations not only support a revised model of Mtb Clp biology, where ClpP2 scaffolds chaperone binding while ClpP1 provides the essential proteolytic activity of the complex; they also have important implications for the ongoing development of inhibitors toward this emerging therapeutic target. Functional asymmetry: Mtb ClpP2 engages chaperones, while ClpP1 provides the essential proteolytic activity of the Clp complex.
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影响因子:
3.6
作者:
Mawla GD;Hall BM;Cárcamo-Oyarce G;Grant RA;Zhang JJ;Kardon JR;Ribbeck K;Sauer RT;Baker TA
通讯作者:
Baker TA
影响因子:
14.9
作者:
Letunic I;Bork P
通讯作者:
Bork P
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通讯作者:
Lewis K
影响因子:
4.8
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Lunge, Ajitesh;Gupta, Radhika;Agarwal, Nisheeth
通讯作者:
Agarwal, Nisheeth
影响因子:
4.6
作者:
Pan, Stefan;Malik, Imran T.;Sass, Peter
通讯作者:
Sass, Peter