Download MendeleyStructural basis of TRPV5 channel inhibition by econazole revealed by cryo-EM.
Hughes, T.E.T., Lodowski, D.T., Huynh, K.W., Yazici, A., Del Rosario, J., Kapoor, A., Basak, S., Samanta, A., Han, X., Chakrapani, S., Zhou, Z.H., Filizola, M., Rohacs, T., Han, S., Moiseenkova-Bell, V.Y.(2018) Nat Struct Mol Biol 25: 53-60
- PubMed: 29323279
- DOI: https://doi.org/10.1038/s41594-017-0009-1
- Primary Citation of Related Structures:
6B5V - PubMed Abstract:
The transient receptor potential vanilloid 5 (TRPV5) channel is a member of the transient receptor potential (TRP) channel family, which is highly selective for Ca 2+ , that is present primarily at the apical membrane of distal tubule epithelial cells in the kidney and plays a key role in Ca 2+ reabsorption. Here we present the structure of the full-length rabbit TRPV5 channel as determined using cryo-EM in complex with its inhibitor econazole. This structure reveals that econazole resides in a hydrophobic pocket analogous to that occupied by phosphatidylinositides and vanilloids in TRPV1, thus suggesting conserved mechanisms for ligand recognition and lipid binding among TRPV channels. The econazole-bound TRPV5 structure adopts a closed conformation with a distinct lower gate that occludes Ca 2+ permeation through the channel. Structural comparisons between TRPV5 and other TRPV channels, complemented with molecular dynamics (MD) simulations of the econazole-bound TRPV5 structure, allowed us to gain mechanistic insight into TRPV5 channel inhibition by small molecules.
Organizational Affiliation:
Department of Pharmacology, School of Medicine, Case Western Reserve University, Cleveland, OH, USA.
