Gating and regulation of KCNH (ERG, EAG, and ELK) channels by intracellular domains.

Gating and regulation of KCNH (ERG, EAG, and ELK) channels by intracellular domains.
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DOI:
10.1080/19336950.2020.1816107
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发表时间:
2020-12
期刊:
Channels (Austin, Tex.)
影响因子:
--
通讯作者:
Trudeau MC
Trudeau MC
中科院分区:
其他
文献类型:
--
作者:
Codding SJ;Johnson AA;Trudeau MC

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KCNH家族包括ERG、EAG和ELK电压激活的钾选择性通道。与其他K通道不同,KCNH通道含有独特的结构域,包括N-末端的PAS(Per-Arnt-Sim)结构域和C-末端的CNBHD(环核苷酸结合同源结构域)。细胞内的PAS结构域和CNBHD直接相互作用,并调节每种类型KCNH通道的一些特征门控特性。PAS-CNBHD相互作用调节HERG通道的缓慢关闭(失活)、EAG通道的激活动力学和闭合态的前脉冲依赖布居(Cole-Moore位移)以及ELK通道的电压依赖性增强。KCNH通道都受与CNBHD结合的C-末端区域的一个内在配体基序的调控。在这里,我们重点介绍了PAS-CNBHD相互作用和本征配体方面的一些最新进展。
The KCNH family comprises the ERG, EAG, and ELK voltage-activated, potassium-selective channels. Distinct from other K channels, KCNH channels contain unique structural domains, including a PAS (Per-Arnt-Sim) domain in the N-terminal region and a CNBHD (cyclic nucleotide-binding homology domain) in the C-terminal region. The intracellular PAS domains and CNBHDs interact directly and regulate some of the characteristic gating properties of each type of KCNH channel. The PAS-CNBHD interaction regulates slow closing (deactivation) of hERG channels, the kinetics of activation and pre-pulse dependent population of closed states (the Cole-Moore shift) in EAG channels and voltage-dependent potentiation in ELK channels. KCNH channels are all regulated by an intrinsic ligand motif in the C-terminal region which binds to the CNBHD. Here, we focus on some recent advances regarding the PAS-CNBHD interaction and the intrinsic ligand.
具有光感受器中存在的以太触发通道的表征显示出与杆内段中的K+电流IKX相似性。
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