FunctionConverts sphingomyelin to ceramide. Also has phospholipase C activity toward palmitoyl lyso-phosphocholine. Does not appear to have nucleotide pyrophosphatase activity.
Tissue specificityDetected in the colon (at protein level). Expressed in the duodenum, jejunum and liver and at low levels in the ileum. Expression was very low in the esophagus, stomach and colon.
Sequence similaritiesBelongs to the nucleotide pyrophosphatase/phosphodiesterase family.
Post-translational modificationsN-glycosylated; required for activity and transport to the plasma membrane.
Cellular localizationMembrane. Localized at the surface of the microvillar membrane in small intestine enterocytes, and in endosome-like structures situated beneath the microvillar membrane, and in Golgi complex.