9KHK

Cryo-EM structure of homomeric TRPC channel, class 2

9KHK の概要

• エントリーDOI: 10.2210/pdb9khk/pdb
• EMDBエントリー: 62345
• 分子名称: Short transient receptor potential channel 5, PHOSPHATIDYLETHANOLAMINE, (2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate, ... (7 entities in total)
• 機能のキーワード: trp, membrane protein
• 由来する生物種: Homo sapiens (human)
• タンパク質・核酸の鎖数: 4
• 化学式量合計: 370532.67

構造登録者

Kim, S.-H.,Lee, H.H. (登録日: 2024-11-10, 公開日: 2025-11-12, 最終更新日: 2026-01-21)

主引用文献

Kim, S.H.,Park, H.,Kim, J.,Kang, H.,Won, J.,Lee, B.C.,So, I.,Lee, H.H.
Molecular architecture of the human TRPC1/C5 heteromeric channel.
Nat Commun, 17:317-317, 2025

PubMed Abstract: Transient receptor potential (TRP) ion channels form heteromers through combinatorial associations of distinct subunits, contributing to the diversity of TRP channel functions. Among them, TRPC5, which forms a heteromer with TRPC1, represents an attractive pharmaceutical target for treating anxiety and depression. Here, we present the cryo-electron microscopy structure of the human TRPC1/C5 heteromer, composed of one TRPC1 subunit and three TRPC5 subunits. The incorporation of TRPC1 into the heteromer disrupts the C symmetry of the TRPC5 homotetramer, resulting in a distinct ion conduction pathway characterized by an asymmetrically constricted selectivity filter and an asymmetric lower gate. The TRPC1/C5 heteromer displays recognizable structural features compared to the TRPC1/C4 heteromer, including a noncanonically tilted coiled-coil domain and a distinct intersubunit interactions. Furthermore, we elucidate the structures of human TRPC5 bound to the TRPC1/4/5-specific agonist, (-)-Englerin A. Our findings establish a foundation for exploring the diversity of heteromeric TRP channels and pave the way for targeting TRPC1/C5 as a therapeutic strategy.

PubMed: 41372144
DOI: 10.1038/s41467-025-67024-9

実験手法

ELECTRON MICROSCOPY (2.9 Å)