May play an important role in cardiac development and function. May regulate cardiac conduction and the function of the gap junction protein GJA1. May contribute to the stability and proper localization of GJA1 to cardiac intercalated disk thereby regulating gap junction communication (By similarity). Regulates mitochondrial respiration and mitochondrial DNA copy number maintenance (By similarity). Monomer. Homodimer. Interacts with GJA1. Interacts weakly with DSP. Localizes at the intercalated disk in ventricular tissue and cardiomyocytes.