CACNG7 encodes calcium voltage-gated channel auxiliary subunit gamma 7, a brain-specific protein with dual regulatory functions. The protein abolishes CaV2.2 (N-type) calcium channel expression by causing a large reduction in channel protein levels rather than affecting trafficking or biophysical properties 1. CACNG7 is specifically expressed in brain tissue 1 and shows differential expression patterns across various brain regions as part of the gamma subunit gene family 2. The gene is located in a tandem cluster on chromosome 19.4 alongside CACNG6 and CACNG8 2. In cardiac tissue, CACNG7 expression is reduced in both atrial and ventricular myocytes during ischemic cardiomyopathy 3. The protein has been identified as part of the cell surface signature of human cardiac progenitor cells 4. CACNG7 represents a distinct subdivision of the gamma subunit family due to its unique five-exon gene structure, low homology to other stargazin-like gamma subunits, and distinctive functional properties 1. The gene also shows altered expression in various pathological conditions including neurodevelopmental disorders and cancer 56.