Enables sphinganine-1-phosphate aldolase activity. Involved in adult somatic muscle development and sphingolipid catabolic process. Predicted to be located in membrane. Predicted to be active in endoplasmic reticulum. Is expressed in several structures, including adult head; adult heart; embryonic/larval midgut primordium; extraembryonic structure; and gut section. Used to study Charcot-Marie-Tooth disease; nephrotic syndrome; and obesity. Human ortholog(s) of this gene implicated in nephrotic syndrome type 14. Orthologous to human SGPL1 (sphingosine-1-phosphate lyase 1).