The c-di-GMP binding protein YcgR controls flagellar motor direction and speed to affect chemotaxis by a "backstop brake" mechanism.
The c-di-GMP binding protein YcgR controls flagellar motor direction and speed to affect chemotaxis by a "backstop brake" mechanism.
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DOI:
10.1016/j.molcel.2010.03.001
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发表时间:
2010-04-09
期刊:
影响因子:
16
通讯作者:
Harshey RM
中科院分区:
文献类型:
--
作者:
Paul K;Nieto V;Carlquist WC;Blair DF;Harshey RM
We describe a mechanism of flagellar motor control by the bacterial signaling molecule c-di-GMP, which regulates several cellular behaviors. E. coli and Salmonella have multiple c-di-GMP cyclases and phosphodiesterases, yet absence of a specific phosphodiesterase YhjH impairs motility in both bacteria. yhjH mutants have elevated c-di-GMP levels and require YcgR, a c-di-GMP-binding protein, for motility inhibition. We demonstrate that YcgR interacts with the flagellar switch-complex proteins FliG and FliM, most strongly in the presence of c-di-GMP. This interaction reduces the efficiency of torque generation and induces CCW motor bias. We present a “backstop brake” model showing how both effects can result from disrupting the organization of the FliG C-terminal domain, which interacts with the stator protein MotA to generate torque. Inhibition of motility and chemotaxis may represent a strategy to prepare for sedentary existence by disfavoring migration away from a substrate on which a biofilm is to be formed.
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影响因子:
2.9
作者:
Kim, Eun A.;Price-Carter, Marian;Carlquist, William C.;Blair, David F.
通讯作者:
Blair, David F.
影响因子:
4.5
作者:
Girgis, Hany S.;Liu, Yirchung;Ryu, William S.;Tavazoie, Saeed
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影响因子:
4.2
作者:
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通讯作者:
Galperin MY
DOI:
10.1073/pnas.91.18.8631
发表时间:
1994-08-30
影响因子:
11.1
作者:
HARSHEY, RM;MATSUYAMA, T
通讯作者:
MATSUYAMA, T
影响因子:
3.2
作者:
Kuchma, Sherry L.;Brothers, Kimberly M.;O'Toole, George A.
通讯作者:
O'Toole, George A.