Non-genetic individuality in Escherichia coli motor switching.
Non-genetic individuality in Escherichia coli motor switching.
复制标题
DOI:
10.1088/1478-3975/8/2/024001
复制
发表时间:
2011-04
期刊:
影响因子:
2
通讯作者:
Wingreen NS
中科院分区:
文献类型:
--
作者:
Mora T;Bai F;Che YS;Minamino T;Namba K;Wingreen NS
By analyzing 30-minute, high-resolution recordings of single E. coli flagellar motors in the physiological regime, we show that two main properties of motor switching —the mean clockwise and mean counter-clockwise interval durations— vary significantly. When we represent these quantities on a two-dimensional plot for several cells, the data does not fall on a one-dimensional curve, as expected with a single control parameter, but instead spreads in two dimensions, pointing to motor individuality. The largest variations are in the mean counter-clockwise interval, and are attributable to variations in the concentration of the internal signaling molecule CheY-P. In contrast, variations in the mean clockwise interval are interpreted in terms of motor individuality. We argue that the sensitivity of the mean counter-clockwise interval to fluctuations in CheY-P is consistent with an optimal strategy of run and tumble. The concomittent variability in mean run length may allow populations of cells to better survive in rapidly changing environments by “hedging their bets”.
登录
查看更多内容
影响因子:
3.2
作者:
Thomas, Dennis R.;Francis, Noreen R.;DeRosier, David J.
通讯作者:
DeRosier, David J.
影响因子:
3.4
作者:
Matthaeus, F.;Jagodic, M.;Dobnikar, J.
通讯作者:
Dobnikar, J.
影响因子:
4.3
作者:
Vladimirov, Nikita;Lovdok, Linda;Lebiedz, Dirk;Sourjik, Victor
通讯作者:
Sourjik, Victor
影响因子:
19
作者:
Halfmann, Randal;Alberti, Simon;Lindquist, Susan
通讯作者:
Lindquist, Susan
影响因子:
64.5
作者:
Boehm, Alex;Kaiser, Matthias;Jenal, Urs
通讯作者:
Jenal, Urs