Secretory carrier-associated membrane protein 2 (SCAMP2) regulates cell surface expression of T-type calcium channels.

ABSTRACT: Low-voltage-activated T-type Ca²⁺ channels are key regulators of neuronal excitability both in the central and peripheral nervous systems. Therefore, their recruitment at the plasma membrane is critical in determining firing activity patterns of nerve cells. In this study, we report the importance of secretory carrier-associated membrane proteins (SCAMPs) in the trafficking regulation of T-type channels. We identified SCAMP2 as a novel Ca_v3.2-interacting protein. In addition, we show that co-expression of SCAMP2 in mammalian cells expressing recombinant Ca_v3.2 channels caused an almost complete drop of the whole cell T-type current, an effect partly reversed by single amino acid mutations within the conserved cytoplasmic E peptide of SCAMP2. SCAMP2-induced

SUBMITTER: Cmarko L 

PROVIDER: S-EPMC8721997 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature