Predicted to enable phosphatidylinositol phosphate binding activity. Predicted to be involved in negative regulation of autophagosome maturation and negative regulation of endocytosis. Predicted to act upstream of or within autophagy. Predicted to be located in endosome. Predicted to be active in early endosome and late endosome. Human ortholog(s) of this gene implicated in autosomal recessive spinocerebellar ataxia 15. Orthologous to human RUBCN (rubicon autophagy regulator).