6BWF

4.1 angstrom Mg2+-unbound structure of mouse TRPM7

6BWF の概要

• エントリーDOI: 10.2210/pdb6bwf/pdb
• EMDBエントリー: 7298
• 分子名称: TRPM7 (1 entity in total)
• 機能のキーワード: cryoem, truncated mouse trpm7, membrane protein
• 由来する生物種: Mus musculus (home mouse)
• タンパク質・核酸の鎖数: 4
• 化学式量合計: 429902.44

構造登録者

Zhang, J.,Li, Z.,Duan, J.,Abiria, S.A.,Clapham, D.E. (登録日: 2017-12-14, 公開日: 2018-08-15, 最終更新日: 2024-03-13)

主引用文献

Duan, J.,Li, Z.,Li, J.,Hulse, R.E.,Santa-Cruz, A.,Valinsky, W.C.,Abiria, S.A.,Krapivinsky, G.,Zhang, J.,Clapham, D.E.
Structure of the mammalian TRPM7, a magnesium channel required during embryonic development.
Proc. Natl. Acad. Sci. U.S.A., 115:E8201-E8210, 2018

PubMed Abstract: The transient receptor potential ion channel subfamily M, member 7 (TRPM7), is a ubiquitously expressed protein that is required for mouse embryonic development. TRPM7 contains both an ion channel and an α-kinase. The channel domain comprises a nonselective cation channel with notable permeability to Mg and Zn Here, we report the closed state structures of the mouse TRPM7 channel domain in three different ionic conditions to overall resolutions of 3.3, 3.7, and 4.1 Å. The structures reveal key residues for an ion binding site in the selectivity filter, with proposed partially hydrated Mg ions occupying the center of the conduction pore. In high [Mg], a prominent external disulfide bond is found in the pore helix, which is essential for ion channel function. Our results provide a structural framework for understanding the TRPM1/3/6/7 subfamily and extend the knowledge base upon which to study the diversity and evolution of TRP channels.

PubMed: 30108148
DOI: 10.1073/pnas.1810719115

実験手法

ELECTRON MICROSCOPY (4.1 Å)