Conservation of Ca2+/calmodulin regulation across Na and Ca2+ channels.
Conservation of Ca2+/calmodulin regulation across Na and Ca2+ channels.
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DOI:
10.1016/j.cell.2014.04.035
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发表时间:
2014-06-19
期刊:
影响因子:
64.5
通讯作者:
Yue DT
中科院分区:
文献类型:
--
作者:
Ben-Johny M;Yang PS;Niu J;Yang W;Joshi-Mukherjee R;Yue DT
Voltage-gated Na and Ca2+channels comprise distinct ion-channel superfamilies, yet the carboxy tails of these channels exhibit high homology hinting at a long-shared and purposeful module. For different Ca2+ channels, carboxyl-tail inter actions with calmodulin do elaborate robust and similar forms of Ca2+ regulation. However, Na channels have only shown subtler Ca2+modulation that differs among reports, challenging attempts at unified understanding. Here, by rapid Ca2+photoreleaseon to Na channels, we reset this view of Na channel regulation. For cardiac muscle channels (NaV1.5), reported effects from which most mechanistic proposals derive, we observe no Ca2+modulation. Conversely, for skeletal-muscle channels (NaV1.4), we uncover fast Ca2+ regulation eerily similar to that of Ca2+ channels. Channel opathic myotonia mutations halve NaV1.4 Ca2+ regulation, and transplanting the NaV1.4 carboxy tail onto Ca2+ channels recapitulates Ca2+ regulation. Thus we argue for the persistence and physiological relevance of an ancient Ca2+ regulatory module across Na and Ca2+ channels.
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DOI:
10.1085/jgp.200709786
发表时间:
2007-05
期刊:
The Journal of general physiology
影响因子:
--
作者:
Dunlap K
通讯作者:
Dunlap K
影响因子:
5.7
作者:
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影响因子:
5.5
作者:
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通讯作者:
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影响因子:
2.8
作者:
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通讯作者:
Cannon, SC
影响因子:
4.8
作者:
Chagot, Benjamin;Potet, Franck;Chazin, Walter J.
通讯作者:
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