Predicted to enable identical protein binding activity. Predicted to be involved in several processes, including neuromuscular synaptic transmission; positive regulation of protein localization to plasma membrane; and positive regulation of voltage-gated calcium channel activity. Predicted to act upstream of or within skeletal muscle fiber development. Predicted to be located in cytosol and nucleoplasm. Predicted to be part of voltage-gated calcium channel complex. Predicted to be extrinsic component of cytoplasmic side of plasma membrane. Human ortholog(s) of this gene implicated in Native American myopathy. Orthologous to human STAC3 (SH3 and cysteine rich domain 3). [provided by Alliance of Genome Resources, Apr 2022]