Enables cholesterol binding activity. Predicted to be involved in several processes, including negative regulation of endocytosis; positive regulation of protein phosphorylation; and regulation of GTPase activity. Located in several cellular components, including microspike; microvillus; and prominosome. Is integral component of plasma membrane. Colocalizes with membrane raft. Orthologous to human PROM2 (prominin 2). [provided by Alliance of Genome Resources, Apr 2022]