4RAX

A regulatory domain of an ion channel

4RAX の概要

• エントリーDOI: 10.2210/pdb4rax/pdb
• 分子名称: Piezo-type mechanosensitive ion channel component 1 (2 entities in total)
• 機能のキーワード: sandwich fold, novel structure, extra-cellular, regulatory domain, regulatory, structural protein
• 由来する生物種: Mus musculus (mouse)
• 細胞内の位置: Endoplasmic reticulum membrane ; Multi-pass membrane protein: E2JF22
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 28346.79

構造登録者

Ge, J.,Yang, M. (登録日: 2014-09-11, 公開日: 2015-09-23, 最終更新日: 2024-11-06)

主引用文献

Ge, J.,Li, W.,Zhao, Q.,Li, N.,Chen, M.,Zhi, P.,Li, R.,Gao, N.,Xiao, B.,Yang, M.
Architecture of the mammalian mechanosensitive Piezo1 channel.
Nature, 527:64-69, 2015

PubMed Abstract: Piezo proteins are evolutionarily conserved and functionally diverse mechanosensitive cation channels. However, the overall structural architecture and gating mechanisms of Piezo channels have remained unknown. Here we determine the cryo-electron microscopy structure of the full-length (2,547 amino acids) mouse Piezo1 (Piezo1) at a resolution of 4.8 Å. Piezo1 forms a trimeric propeller-like structure (about 900 kilodalton), with the extracellular domains resembling three distal blades and a central cap. The transmembrane region has 14 apparently resolved segments per subunit. These segments form three peripheral wings and a central pore module that encloses a potential ion-conducting pore. The rather flexible extracellular blade domains are connected to the central intracellular domain by three long beam-like structures. This trimeric architecture suggests that Piezo1 may use its peripheral regions as force sensors to gate the central ion-conducting pore.

PubMed: 26390154
DOI: 10.1038/nature15247

実験手法

X-RAY DIFFRACTION (1.45 Å)