Title : Structures of dimeric human NPC1L1 provide insight into mechanisms for cholesterol absorption.

Pub. Date : 2021 Aug

PMID : 34407950






8 Functional Relationships(s)
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1 Structures of dimeric human NPC1L1 provide insight into mechanisms for cholesterol absorption. Cholesterol NPC1 like intracellular cholesterol transporter 1 Homo sapiens
2 Polytopic Niemann-Pick C1-like 1 (NPC1L1) plays a major role in intestinal absorption of biliary cholesterol, vitamin E (VE), and vitamin K (VK). Cholesterol NPC1 like intracellular cholesterol transporter 1 Homo sapiens
3 The drug ezetimibe inhibits NPC1L1-mediated absorption of cholesterol, lowering of circulating levels of low-density lipoprotein cholesterol. Cholesterol NPC1 like intracellular cholesterol transporter 1 Homo sapiens
4 Here, we report cryo-electron microscopy structures of human NPC1L1 (hNPC1L1) bound to either cholesterol or a lipid resembling VE. Cholesterol NPC1 like intracellular cholesterol transporter 1 Homo sapiens
5 Here, we report cryo-electron microscopy structures of human NPC1L1 (hNPC1L1) bound to either cholesterol or a lipid resembling VE. Cholesterol NPC1 like intracellular cholesterol transporter 1 Homo sapiens
6 These findings, together with functional assays, reveal that the same intramolecular channel in hNPC1L1 mediates transport of VE and cholesterol. Cholesterol NPC1 like intracellular cholesterol transporter 1 Homo sapiens
7 Mutation of tryptophan-347 lies in this region disrupts dimerization and the resultant monomeric NPC1L1 exhibits reduced efficiency of cholesterol uptake. Cholesterol NPC1 like intracellular cholesterol transporter 1 Homo sapiens
8 These findings identify the oligomeric state of hNPC1L1 as a target for therapies that inhibit uptake of dietary cholesterol and reduce the incidence of cardiovascular disease. Cholesterol NPC1 like intracellular cholesterol transporter 1 Homo sapiens