The protein encoded by this gene is a type I transmembrane AMPA receptor regulatory protein (TARP). TARPs regulate both trafficking and channel gating of the AMPA receptors. This gene is part of a functionally diverse eight-member protein subfamily of the PMP-22/EMP/MP20 family. This gene is a susceptibility locus for childhood absence epilepsy. CACNG3 (Calcium Voltage-Gated Channel Auxiliary Subunit Gamma 3) is a Protein Coding gene. Diseases associated with CACNG3 include Childhood Absence Epilepsy. Among its related pathways are CCR5 Pathway in Macrophages and PEDF Induced Signaling. GO annotations related to this gene include voltage-gated calcium channel activity. An important paralog of this gene is CACNG2.