May regulate the synthesis and function of lysosomes and of highly specialized organelles, such as melanosomes and platelet dense granules. Regulates intracellular vesicular trafficking in fibroblasts. May be involved in the regulation of general functions of integrins. . This is the function of ENSG00000110756 (HPS5, HPS5 biogenesis of lysosomal organelles complex 2 subunit 2).