Download MendeleyMolecular architecture of the human TRPC1/C5 heteromeric channel.
Kim, S.H., Park, H., Kim, J., Kang, H., Won, J., Lee, B.C., So, I., Lee, H.H.(2025) Nat Commun 17: 317-317
- PubMed: 41372144
- DOI: https://doi.org/10.1038/s41467-025-67024-9
- Primary Citation of Related Structures:
9KHI, 9KHJ, 9KHK, 9LZY, 9LZZ - 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 4 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.
- Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul, Republic of Korea.
Organizational Affiliation:
