Recent Faculty Publication: "The L-type calcium channel current modulation mechanism: the plot thickens and fogs"

J Clin Invest. 2019 Feb 1;129(2):496-498. doi: 10.1172/JCI125958. Epub 2019 Jan 7.

The L-type calcium channel current modulation mechanism: the plot thickens and fogs.

Abstract

Stressful situations provoke the fight-or-flight response, incurring rapid elevation of cardiac output via activation of protein kinase A (PKA). In this issue of the JCI, Yang et al. focus on the L-type calcium channel complex (LTCC), and their findings require reexamination of dogmatic principles. LTCC phosphorylation sites identified and studied to date are dispensable for PKA modulation of LTCC; however, a CaVβ2-CaV1.2 calcium channel interaction is now shown to be required. Yang et al. suggest a new hypothesis that LTCC modulation involves rearrangement of auxiliary proteins within the LTCC. However, we still do not know the targets of PKA that mediate LTCC modulation.

PMID:
 
30614816
 
DOI:
 
10.1172/JCI125958