Predicted to enable 3-dehydrosphinganine reductase activity. Acts upstream of or within sphingolipid biosynthetic process. Predicted to be located in endoplasmic reticulum. Predicted to be active in endoplasmic reticulum membrane. Human ortholog(s) of this gene implicated in erythrokeratodermia variabilis et progressiva 4 and follicular lymphoma. Orthologous to human KDSR (3-ketodihydrosphingosine reductase). [provided by Alliance of Genome Resources, Apr 2022]