Tension mediated mechanical activation and pocket delipidation lead to an analogous MscL state
Tension mediated mechanical activation and pocket delipidation lead to an analogous MscL state
复制标题
张力介导的机械激活和口袋脱脂导致类似的 MscL 状态
DOI:
10.1101/2021.04.01.438050
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Wang B
中科院分区:
文献类型:
--
作者:
Wang B
The MscL channel gates in response to membrane tension changes to allow the exchange of molecules through its pore. Lipid removal from transmembrane pockets leads to a MscL response. However, it is unknown whether there is correlation between the tension mediated state and the state derived by pocket delipidation in the absence of tension. Transitions between MscL states may follow a similar pathway to cover the available conformational space but may not necessarily sample the same discrete intermediates. Here, we combined pulsed-EPR and HDX-MS measurements on MscL, coupled with molecular dynamics under membrane tension, to investigate the changes associated with the distinctively derived states. Whether it is tension or pocket delipidation, we find that MscL samples a similar expanded state, which is the final step of the delipidation pathway but only an intermediate stop of the tension mediated path. Our findings hint at synergistic modes of regulation in mechanosensitive channels.
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期刊:
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影响因子:
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