Kalman-like Self-Tuned Sensitivity in Biophysical Sensing.
Kalman-like Self-Tuned Sensitivity in Biophysical Sensing.
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DOI:
10.1016/j.cels.2019.08.008
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发表时间:
2019-11-27
期刊:
影响因子:
9.3
通讯作者:
中科院分区:
文献类型:
--
作者:
Living organisms need to be sensitive to a changing environment while also ignoring uninformative environmental fluctuations. Here, we argue that living cells can navigate these conflicting demands by dynamically tuning their environmental sensitivity. We analyze the circadian clock in Synechococcus elongatus, showing that a clock-metabolism coupling can detect mismatch between clock predictions and the day-night light cycle, temporarily raise the clock’s sensitivity to light changes, and thus re-entrain faster. We find analogous behavior in recent experiments on switching between slow and fast osmotic stress response pathways in yeast. In both cases, cells can raise their sensitivity to new external information in epochs of frequent challenging stress, much like a Kalman filter with adaptive gain in signal processing. Our work suggests a new class of experiments that probe the history-dependence of environmental sensitivity in biophysical sensing mechanisms. By comparing measurements of their environments against predictions from signaling, cells can tune their sensitivity to new environmental information and respond to stimuli both accurately and quickly.
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影响因子:
9.2
作者:
Pattanayak, Gopal K.;Phong, Connie;Rust, Michael J.
通讯作者:
Rust, Michael J.
DOI:
10.1073/pnas.1812810116
发表时间:
2019-04-30
影响因子:
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作者:
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通讯作者:
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影响因子:
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作者:
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通讯作者:
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DOI:
10.1126/science.aab0892
发表时间:
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期刊:
Science (New York, N.Y.)
影响因子:
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作者:
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通讯作者:
Lim WA
影响因子:
5.7
作者:
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通讯作者:
Andrews, Angus P.