Antitoxin MqsA helps mediate the bacterial general stress response.
Antitoxin MqsA helps mediate the bacterial general stress response.
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DOI:
10.1038/nchembio.560
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发表时间:
2011-06
影响因子:
14.8
通讯作者:
Wood, Thomas K.
中科院分区:
文献类型:
--
作者:
Wang, Xiaoxue;Kim, Younghoon;Hong, Seok Hoon;Ma, Qun;Brown, Breann L.;Pu, Mingming;Tarone, Aaron M.;Benedik, Michael J.;Peti, Wolfgang;Page, Rebecca;Wood, Thomas K.
Although it is well-recognized that bacteria respond to environmental stress via global networks, the mechanism by which stress is relayed to the interior of the cell is poorly understood. Here we show that enigmatic toxin/antitoxin systems play a vital role in mediating the environmental stress response. Specifically, the antitoxin MqsA represses rpoS, which encodes the master regulator of stress. Repression of rpoS by MqsA reduces the concentration of the internal messenger 3,5-cyclic diguanylic acid, leading to increased motility and decreased biofilm formation. Furthermore, the repression of rpoS by MqsA decreases oxidative stress resistance via catalase activity. Upon oxidative stress, MqsA is rapidly degraded by Lon protease resulting in induction of rpoS. Hence, we show that external stress alters gene regulation controlled by toxin/antitoxin systems, such that the degradation of antitoxins during stress leads to a switch from the planktonic state (high motility) to the biofilm state (low motility).
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DOI:
10.1007/978-1-60327-279-7_7
发表时间:
2010-01-01
期刊:
ANTIBIOTIC RESISTANCE PROTOCOLS, SECOND EDITION
影响因子:
--
作者:
Macvanin, Mirjana;Hughes, Diarmaid
通讯作者:
Hughes, Diarmaid
影响因子:
5.1
作者:
Kim Y;Wang X;Zhang XS;Grigoriu S;Page R;Peti W;Wood TK
通讯作者:
Wood TK
影响因子:
3.7
作者:
Kolodkin-Gal I;Verdiger R;Shlosberg-Fedida A;Engelberg-Kulka H
通讯作者:
Engelberg-Kulka H
影响因子:
3.2
作者:
Barrios, AFG;Zuo, RJ;Wood, TK
通讯作者:
Wood, TK
影响因子:
3.2
作者:
Kim, Younghoon;Wang, Xiaoxue;Wood, Thomas K.
通讯作者:
Wood, Thomas K.