Predicted to enable protein transmembrane transporter activity. Predicted to be involved in several processes, including endosome to melanosome transport; establishment of vesicle localization; and platelet activation. Predicted to act upstream of or within several processes, including positive regulation of natural killer cell activation; secretion of lysosomal enzymes; and vesicle organization. Predicted to be located in cytosol and transport vesicle. Predicted to be part of BLOC-1 complex. Human ortholog(s) of this gene implicated in Hermansky-Pudlak syndrome 8. Orthologous to human BLOC1S3 (biogenesis of lysosomal organelles complex 1 subunit 3). [provided by Alliance of Genome Resources, Apr 2022]