Predicted to enable protein domain specific binding activity. Acts upstream of or within exocytosis. Located in synaptic vesicle membrane and zymogen granule membrane. Is expressed in neural retinal epithelium; retina inner nuclear layer; retina nuclear layer; and retina outer nuclear layer. Orthologous to human SCAMP1 (secretory carrier membrane protein 1). [provided by Alliance of Genome Resources, Apr 2022]