Enables phosphatidylinositol phosphate binding activity. Involved in positive regulation of neuron projection development. Acts upstream of or within several processes, including hemoglobin biosynthetic process; regulation of intracellular protein transport; and transferrin transport. Predicted to be located in cytoplasmic vesicle and cytosol. Predicted to be part of retromer complex. Predicted to be active in early endosome membrane. Is expressed in several structures, including alimentary system; branchial arch; central nervous system; genitourinary system; and sensory organ. Human ortholog(s) of this gene implicated in syndromic microphthalmia 8. Orthologous to human SNX3 (sorting nexin 3). [provided by Alliance of Genome Resources, Apr 2022]