Predicted to enable calcium channel regulator activity and voltage-gated calcium channel activity. Involved in positive regulation of dendrite extension; regulation of AMPA receptor activity; and regulation of mRNA stability. Located in cerebellar mossy fiber; early endosome; and neuronal cell body. Part of AMPA glutamate receptor complex. Is active in glutamatergic synapse. Is integral component of postsynaptic density membrane. Orthologous to human CACNG7 (calcium voltage-gated channel auxiliary subunit gamma 7). [provided by Alliance of Genome Resources, Apr 2022]