Predicted to enable phosphatidylinositol 3-kinase regulator activity. Predicted to be involved in early endosome to late endosome transport; regulation of cellular protein catabolic process; and regulation of phosphatidylinositol 3-kinase activity. Predicted to be located in cytosol. Predicted to be active in early endosome membrane and late endosome membrane. Predicted to be extrinsic component of endosome membrane. Orthologous to human WDR91 (WD repeat domain 91). [provided by Alliance of Genome Resources, Apr 2022]