Regulation of Cardiac Cav1.2 Channels by Calmodulin.

ABSTRACT: Cav1.2 Ca²⁺ channels, a type of voltage-gated L-type Ca²⁺ channel, are ubiquitously expressed, and the predominant Ca²⁺ channel type, in working cardiac myocytes. Cav1.2 channels are regulated by the direct interactions with calmodulin (CaM), a Ca²⁺-binding protein that causes Ca²⁺-dependent facilitation (CDF) and inactivation (CDI). Ca²⁺-free CaM (apoCaM) also contributes to the regulation of Cav1.2 channels. Furthermore, CaM indirectly affects channel activity by activating CaM-dependent enzymes, such as CaM-dependent protein kinase II and calcineurin (a CaM-dependent protein phosphatase). In this article, we review the recent progress in identifying the role of apoCaM in the channel 'rundown' phenomena and related reprimi

SUBMITTER: Kameyama M 

PROVIDER: S-EPMC10094977 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature