Activation of Slo1 BK channels by Mg2+ coordinated between the voltage sensor and RCK1 domains.
Activation of Slo1 BK channels by Mg2+ coordinated between the voltage sensor and RCK1 domains.
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DOI:
10.1038/nsmb.1507
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发表时间:
2008-11
影响因子:
16.8
通讯作者:
Cui, Jianmin
中科院分区:
文献类型:
--
作者:
Yang, Huanghe;Shi, Jingyi;Zhang, Guohui;Yang, Junqiu;Delaloye, Kelli;Cui, Jianmin
The voltage sensor domain (VSD) and the ligand sensor (cytoplasmic domain) of BK channels synergistically control channel activities, thereby integrating electrical and chemical signals for cell function. Studies show that intracellular Mg2+ mediates the interaction between these sensory domains to activate the channel through an electrostatic interaction with the VSD. Here we report that Mg2+ binds to a site that consists of amino acid side-chains from both the VSD (Asp99 and Asn172) and the cytoplasmic domain (Glu374 and Glu399). For each Mg2+ binding site the residues in the VSD and those in the cytoplasmic domain come from neighboring subunits. These results suggest that the VSD and the cytoplasmic domains from different subunits may interact during channel gating, and the packing of VSD or the RCK1 domain to the pore in BK channels differ from that in Kv1.2 or MthK channels.
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DOI:
10.1085/jgp.200509419
发表时间:
2006-06
期刊:
The Journal of general physiology
影响因子:
--
作者:
Fodor AA;Aldrich RW
通讯作者:
Aldrich RW
影响因子:
3.8
作者:
Horrigan, Frank T.;Ma, Zhongming
通讯作者:
Ma, Zhongming
影响因子:
16.8
作者:
Hou, Shangwei;Xu, Rong;Hoshi, Toshinori
通讯作者:
Hoshi, Toshinori
DOI:
10.1073/pnas.0800304105
发表时间:
2008-03-11
影响因子:
11.1
作者:
Hou, Shangwei;Xu, Rong;Hoshi, Toshinori
通讯作者:
Hoshi, Toshinori
影响因子:
16.2
作者:
Jiang, YX;Pico, A;MacKinnon, R
通讯作者:
MacKinnon, R