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Title:
Identification of the Conformational transition pathway in PIP2 Opening Kir Channels
Author: Li JW; Lv SQ(吕守芹); Liu YZ; Pang CL; Chen YF; Zhang SH; Yu H; Long M(龙勉); Zhang HL; Logothetis DE; Zhan Y; An HL
Source: SCIENTIFIC REPORTS
Issued Date: 2015-06-11
Volume: 5, Pages:11289
Abstract:

The gating of Kir channels depends critically on phosphatidylinositol 4,5-bisphosphate (PIP2), but the detailed mechanism by which PIP2 regulates Kir channels remains obscure. Here, we performed a series of Targeted molecular dynamics simulations on the full-length Kir2.1 channel and, for the first time, were able to achieve the transition from the closed to the open state. Our data show that with the upward motion of the cytoplasmic domain (CTD) the structure of the C-Linker changes from a loop to a helix. The twisting of the C-linker triggers the rotation of the CTD, which induces a small downward movement of the CTD and an upward motion of the slide helix toward the membrane that pulls the inner helix gate open. At the same time, the rotation of the CTD breaks the interaction between the CD- and G-loops thus releasing the G-loop. The G-loop then bounces away from the CD-loop, which leads to the opening of the G-loop gate and the full opening of the pore. We identified a series of interaction networks, between the N-terminus, CD loop, C linker and G loop one by one, which exquisitely regulates the global conformational changes during the opening of Kir channels by PIP2.

Language: 英语
Indexed Type: SCI
Corresponding Author: An, HL (reprint author), Hebei Univ Technol, Inst Biophys, Sch Sci, Key Lab Mol Biophys, Tianjin 300401, Hebei Province, Peoples R China.
Correspondent Email: zhany@hebut.edu.cn ; hailong_an@hebut.edu.cn
DOI: 10.1038/srep11289
Related URLs: 查看原文
DOC Type: Article
WOS Subject: Multidisciplinary Sciences
WOS Subject Extended: Science & Technology - Other Topics
WOS ID: WOS:000356099300001
ISSN: 2045-2322
Funder: National Natural Science Foundation of China [11247010, 11175055, 11475053, 11347017] ; NIH R01 grant [HL059949] ; Natural Science Foundation of the Hebei Province of China [C2012202079, C2015202340]
Rank: [Li, Junwei; Pang, Chunli; Chen, Yafei; Zhang, Suhua; Yu, Hui; Zhan, Yong; An, Hailong] Hebei Univ Technol, Inst Biophys, Sch Sci, Key Lab Mol Biophys, Tianjin 300401, Hebei Province, Peoples R China; [Lu, Shouqin; Long, Mian] Chinese Acad Sci, Inst Mech, Ctr Biomech & Bioengn, Beijing 100190, Peoples R China; [Lu, Shouqin; Long, Mian] Chinese Acad Sci, Inst Mech, Natl Micrograv Lab, Key Lab Micrograv, Beijing 100190, Peoples R China; [Liu, Yuzhi] Shijiazhuang Tiedao Univ, Sch Elect & Elect Engn, Shijiazhuang 050043, Peoples R China; [Zhang, Hailin] Hebei Med Univ, Dept Pharmacol, Key Lab Pharmacol & Toxicol New Drug, Minist Educ,Key Lab Neural & Vasc Biol, Shijiazhuang 050017, Hebei Province, Peoples R China; [Logothetis, Diomedes E.] Virginia Commonwealth Univ, Sch Med, Dept Physiol & Biophys, Richmond, VA 23298 USA
Department: NML分子-细胞生物力学与空间生命科学
Classification: 一类
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Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/54972
Appears in Collections:国家微重力实验室_期刊论文

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Recommended Citation:
Li JW,Lv SQ,Liu YZ,et al. Identification of the Conformational transition pathway in PIP2 Opening Kir Channels[J]. SCIENTIFIC REPORTS,2015-06-11,5:11289.
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