Predicted to enable zinc ion binding activity. Predicted to be involved in zinc ion import into synaptic vesicle. Located in intracellular vesicle. Is integral component of synaptic vesicle membrane. Is active in plasma membrane. Is expressed in cerebral cortex; cortical layer V; cortical subplate; heart; and limb. Orthologous to human TMEM163 (transmembrane protein 163). [provided by Alliance of Genome Resources, Apr 2022]