Acts upstream of or within T-tubule organization; cellular calcium ion homeostasis; and heart development. Predicted to be located in membrane and synaptic vesicle. Predicted to be integral component of membrane. Predicted to be active in synaptic vesicle membrane. Is expressed in heart ventricle. Orthologous to human SYPL2 (synaptophysin like 2). [provided by Alliance of Genome Resources, Apr 2022]