Ultrasensitivity of an adaptive bacterial motor.
Ultrasensitivity of an adaptive bacterial motor.
复制标题
自适应细菌运动的超敏性。
DOI:
10.1016/j.jmb.2013.02.016
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发表时间:
2013-05-27
影响因子:
5.6
通讯作者:
Berg, Howard C.
中科院分区:
文献类型:
--
作者:
Yuan, Junhua;Berg, Howard C.
The flagellar motor of Escherichia coli has been shown to adapt to changes in the steady-state level of the chemotaxis response regulator, CheY-P, by adjusting the number of molecules to which CheY-P binds, FliM. Previous measurements of motor ultrasensitivity have been made on cells containing different amounts of CheY-P, and thus different amounts of FliM. Here, we designed an experiment to measure the sensitivity of motors containing fixed amounts of FliM, finding Hill coefficients about twice as large as those observed before. This ultrasensitivity provides further insights into the motor switching mechanism and plays important roles in chemotaxis signal amplification and coordination of multiple motors. The Hill coefficients observed here appear to be the highest known for allosteric protein complexes, either biological or synthetic. Extreme motor ultrasensitivity broadens our understanding of mechanisms of allostery, and serves as an inspiration for future design of synthetic protein switches.
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影响因子:
64.8
作者:
BERG, HC;ANDERSON, RA
通讯作者:
ANDERSON, RA
影响因子:
3.5
作者:
GRAY, TE;FERSHT, AR
通讯作者:
FERSHT, AR
影响因子:
3.2
作者:
PARKINSON, JS
通讯作者:
PARKINSON, JS
影响因子:
5.6
作者:
Duke, TAJ;Le Novère, N;Bray, D
通讯作者:
Bray, D
DOI:
10.1101/sqb.1963.028.01.064
发表时间:
1963-01-01
期刊:
COLD SPRING HARBOR SYMPOSIA ON QUANTITATIVE BIOLOGY
影响因子:
--
作者:
WYMAN, J
通讯作者:
WYMAN, J