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首页> 外文期刊>Biochemistry >Formation of CLC-0 chloride channels from separated transmembrane and cytoplasmic domains
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Formation of CLC-0 chloride channels from separated transmembrane and cytoplasmic domains

机译:由分离的跨膜和胞质域形成CLC-0氯通道

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摘要

CLC-0, a member of the CLC family of Cl--conducting ion channels, consists of an N-terminal hydrophobic core and a C-terminal region that is thought to be cytoplasmic. This study provides evidence that the C-terminal region is a mechanistically relevant cytoplasmic domain of the CLC-0 ion channel. Both a point mutation and a 37-residue deletion in this region cause drastic alterations in voltage-dependent gating of CLC-0 current expressed in Xenopus oocytes. CLC-0 current is not observed when the entire C-terminal region is deleted, but functional channels are efficiently reconstituted by co-injection of separate cRNA constructs encoding the N-terminal transmembrane and the C-terminal cytoplasmic domains. Moreover, reconstitution of CLC-0 can be achieved by co-injection of cRNA encoding the transmembrane domain along with Escherichia coli-expressed C-terminal domain polypeptide. [References: 52]
机译:CLC-0是CLC导电离子通道家族的成员,由N端疏水核和C端区域组成,被认为是细胞质的。这项研究提供的证据表明,C末端区域是CLC-0离子通道的机械相关胞质域。在该区域中的点突变和37个残基的缺失均引起爪蟾卵母细胞中表达的CLC-0电流的电压依赖性门控的急剧变化。当删除整个C端区域时,未观察到CLC-0电流,但是通过共同注射编码N端跨膜和C端胞质域的单独cRNA构建体,有效重建了功能通道。而且,可以通过共同注射编码跨膜结构域的cRNA和表达大肠杆菌的C末端结构域多肽来实现CLC-0的重建。 [参考:52]

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