The Sixth Transmembrane Segment Is a Major Gating Component of the TMEM16A Calcium-Activated Chloride Channel.
The Sixth Transmembrane Segment Is a Major Gating Component of the TMEM16A Calcium-Activated Chloride Channel.
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DOI:
10.1016/j.neuron.2018.01.048
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发表时间:
2018-03-07
期刊:
影响因子:
16.2
通讯作者:
Jan LY
中科院分区:
文献类型:
--
作者:
Peters CJ;Gilchrist JM;Tien J;Bethel NP;Qi L;Chen T;Wang L;Jan YN;Grabe M;Jan LY
Calcium-activated chloride channels (CaCC) formed by TMEM16A or TMEM16B are broadly expressed in the nervous system, smooth muscles, exocrine glands, and other tissues. With two calcium-binding sites and a pore within each monomer, the dimeric CaCC exhibits voltage dependent calcium sensitivity. Channel activity also depends on the identity of permeant anions. To understand how CaCC regulates neuronal signaling and how CaCC is, in turn, modulated by neuronal activity, we examined the molecular basis of CaCC gating. Here we report voltage modulation of TMEM16A-CaCC involves voltage-dependent occupancy of calcium and anion binding site(s) within the membrane electric field as well as a voltage-dependent conformational change intrinsic to the channel protein. These gating modalities all critically depend on the sixth transmembrane segment. TMEM16A is an ion channel protein with functions in a multitude of cell types. Peters et al. identified a specific domain that integrates the responses of this channel to three separable physiological stimuli.
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影响因子:
3.3
作者:
Klauda, Jeffery B.;Venable, Richard M.;Freites, J. Alfredo;O'Connor, Joseph W.;Tobias, Douglas J.;Mondragon-Ramirez, Carlos;Vorobyov, Igor;MacKerell, Alexander D., Jr.;Pastor, Richard W.
通讯作者:
Pastor, Richard W.
DOI:
10.1085/jgp.201611650
发表时间:
2016-11
期刊:
The Journal of general physiology
影响因子:
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通讯作者:
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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:
Galietta, Luis J. V.