7DF8

full length hNPC1L1-Apo

7DF8 の概要

• エントリーDOI: 10.2210/pdb7df8/pdb
• EMDBエントリー: 30662
• 分子名称: NPC1-like intracellular cholesterol transporter 1, 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose, 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose, ... (6 entities in total)
• 機能のキーワード: cholesterol, membrane protein
• 由来する生物種: Homo sapiens (Human)
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 144968.48

構造登録者

Hu, M.,Sun, S.,Sui, S. (登録日: 2020-11-06, 公開日: 2021-08-04, 最終更新日: 2024-10-30)

主引用文献

Hu, M.,Yang, F.,Huang, Y.,You, X.,Liu, D.,Sun, S.,Sui, S.F.
Structural insights into the mechanism of human NPC1L1-mediated cholesterol uptake.
Sci Adv, 7:-, 2021

PubMed Abstract: 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.

PubMed: 34272236
DOI: 10.1126/sciadv.abg3188

実験手法

ELECTRON MICROSCOPY (3.03 Å)