Electrochemical potential enables dormant spores to integrate environmental signals.
Electrochemical potential enables dormant spores to integrate environmental signals.
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电化学潜力使休眠的孢子能够整合环境信号。
DOI:
10.1126/science.abl7484
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发表时间:
2022-10-07
期刊:
影响因子:
--
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中科院分区:
文献类型:
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The dormant state of bacterial spores is generally thought to be devoid of biological activity. We show that despite continued dormancy, spores can integrate environmental signals over time through a pre-existing electrochemical potential. Specifically, we studied thousands of individual Bacillus subtilis spores that remain dormant when exposed to transient nutrient pulses. Guided by a mathematical model of bacterial electrophysiology, we modulated the decision to exit dormancy by genetically and chemically targeting potassium ion flux. We confirmed that short nutrient pulses result in step-like changes in the electrochemical potential of persistent spores. During dormancy, spores thus gradually release their stored electrochemical potential to integrate extracellular information over time. These findings reveal a decision-making mechanism that operates in physiologically inactive cells. Bacterial spores use an integrate-and-fire mechanism to monitor external conditions during dormancy.
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DOI:
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发表时间:
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影响因子:
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