Sphingomyelin phosphodiesterase 1 (SMPD1), also known as acid sphingomyelinase (ASM), is an enzyme that in humans is encoded by the SMPD1 gene.
Sphingomyelin phosphodiesterase 1 belongs to the sphingomyelin phosphodiesterase family.[5]
Defects in the SMPD1 gene cause Niemann–Pick disease, SMPD1-associated.[5]
A mutation from leucine to proline at amino acid residue 302 encoded by the SMPD1 gene was identified by Gan-Or et al. (2013) as a risk factor for Parkinson disease.[6]