Predicted to enable LIM domain binding activity. Involved in glucose homeostasis and positive regulation of insulin secretion. Acts upstream of or within negative regulation of G protein-coupled receptor signaling pathway and regulation of calcium ion-dependent exocytosis. Predicted to be located in secretory granule membrane. Orthologous to human RPH3AL (rabphilin 3A like (without C2 domains)). [provided by Alliance of Genome Resources, Apr 2022]