Enables fatty acid binding activity. Involved in G protein-coupled receptor signaling pathway; positive regulation of calcium ion transport into cytosol; and positive regulation of insulin secretion. Predicted to be located in plasma membrane. Predicted to be integral component of plasma membrane. Human ortholog(s) of this gene implicated in type 2 diabetes mellitus. Orthologous to human FFAR1 (free fatty acid receptor 1). [provided by Alliance of Genome Resources, Apr 2022]