Krabbe Disease, Atypical, Due to Saposin a Deficiency, also known as krabbe disease, atypical, is related to krabbe disease and lysosomal storage disease. An important gene associated with Krabbe Disease, Atypical, Due to Saposin a Deficiency is PSAP (Prosaposin). Affiliated tissues include brain, and related phenotypes are hyperreflexia and respiratory insufficiency