Structural insights into the mechanism of human NPC1L1-mediated cholesterol uptake.
Structural insights into the mechanism of human NPC1L1-mediated cholesterol uptake.
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人类 NPC1L1 介导的胆固醇摄取机制的结构见解
DOI:
10.1126/sciadv.abg3188
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发表时间:
2021-07
期刊:
影响因子:
13.6
通讯作者:
Sui SF
中科院分区:
文献类型:
--
作者:
Hu M;Yang F;Huang Y;You X;Liu D;Sun S;Sui SF
Structures of NPC1L1 reveal how NPC1L1 senses the cholesterol level by conformational changes of the sterol-sensing domain. Niemann-Pick C1-like 1 (NPC1L1) protein plays a central role in the intestinal cholesterol absorption and is the target of a drug, ezetimibe, which inhibits NPC1L1 to reduce cholesterol absorption. Here, we present cryo–electron microscopy structures of human NPC1L1 in apo state, cholesterol-enriched state, and ezetimibe-bound state to reveal molecular details of NPC1L1-mediated cholesterol uptake and ezetimibe inhibition. Comparison of these structures reveals that the sterol-sensing domain (SSD) could respond to the cholesterol level alteration by binding different number of cholesterol molecules. Upon increasing cholesterol level, SSD binds more cholesterol molecules, which, in turn, triggers the formation of a stable structural cluster in SSD, while binding of ezetimibe causes the deformation of the SSD and destroys the structural cluster, leading to the inhibition of NPC1L1 function. These results provide insights into mechanisms of NPC1L1 function and ezetimibe action and are of great significance for the development of new cholesterol absorption inhibitors.
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DOI:
10.1107/s2059798318009324
发表时间:
2018-09-01
期刊:
Acta crystallographica. Section D, Structural biology
影响因子:
--
作者:
Afonine PV;Klaholz BP;Moriarty NW;Poon BK;Sobolev OV;Terwilliger TC;Adams PD;Urzhumtsev A
通讯作者:
Urzhumtsev A
影响因子:
4.8
作者:
Davis, HR;Zhu, LJ;Altmann, SW
通讯作者:
Altmann, SW
影响因子:
29
作者:
Ge, Liang;Wang, Jing;Song, Bao-Liang
通讯作者:
Song, Bao-Liang
DOI:
10.1073/pnas.1014434108
发表时间:
2011-01-11
影响因子:
11.1
作者:
Ge, Liang;Qi, Wei;Song, Bao-Liang
通讯作者:
Song, Bao-Liang
影响因子:
16
作者:
Brown, AJ;Sun, LP;Goldstein, JL
通讯作者:
Goldstein, JL