Enables sphingolipid binding activity. Acts upstream of or within sphingolipid biosynthetic process. Located in several cellular components, including perinuclear region of cytoplasm; photoreceptor inner segment; and photoreceptor outer segment. Is expressed in eye and optic nerve. Used to study retinitis pigmentosa 26. Human ortholog(s) of this gene implicated in retinitis pigmentosa and retinitis pigmentosa 26. Orthologous to human CERKL (ceramide kinase like). [provided by Alliance of Genome Resources, Apr 2022]