Download MendeleyStructural basis for efonidipine block of a voltage-gated Ca2+channel.
Xu, F., Xiong, W., Huang, Y., Shen, J., Zhou, D., Tang, L.(2019) Biochem Biophys Res Commun 513: 631-634
- PubMed: 30981510
- DOI: https://doi.org/10.1016/j.bbrc.2019.03.176
- Primary Citation of Related Structures:
6JUH - PubMed Abstract:
Efonidipine is a dual L-/T- type calcium channel blocker with a slow onset of action and a long lasting effect that exibihits antihypertensive and nephroprotective effects. differs from most other DHPs which can induce reflex tachycardia. Efonidipine reduces blood pressure without decreasing cardiac output and exerts organ-protective effects on the heart and kidney. In order to investigate how efonidipine block voltage-gated Ca 2+ channel, we determined the crystal structure of Ca V Ab in complex with efonidipine at atomic resolution using x-ray crystallography. Our results reveal that efonidipine targets the central cavity of a model voltage-gated calcium channel underneath its selectivity filter and occlude the channel in an inactivated state. Binding of efonidipine does not break down the fourfold symmetry of the quaternary structure and its pore structure. Our work provides the structural basis for efonidipine block of a voltage-gated Ca 2+ channel at the molecular level.
Organizational Affiliation:
Department of Neurology, West China Hospital, Sichuan University, Chengdu, Sichuan, 61004, China.
