Automated description from the Alliance of Genome Resources (Release 7.1.0)
Enables small GTPase binding activity. Acts upstream of or within blood coagulation and melanocyte differentiation. Located in cytoplasmic vesicle. Is expressed in midgut and midgut loop. Used to study Hermansky-Pudlak syndrome 4 and platelet storage pool deficiency. Human ortholog(s) of this gene implicated in Hermansky-Pudlak syndrome; Hermansky-Pudlak syndrome 4; and schizophrenia. Orthologous to human HPS4 (HPS4 biogenesis of lysosomal organelles complex 3 subunit 2).