Saposin-B

**Semantic type:** Amino Acid, Peptide, or Protein

**Definition:** Saposin-B (79 aa, ~9 kDa) is encoded by the human PSAP gene. This protein is involved in promoting the hydrolysis of galacto-cerebroside sulfate, GM1 gangliosides and globotriaosylceramide by arylsulfatase A, beta-galactosidase and alpha-galactosidase A, respectively.

**Synonyms:** - CSAct - Cerebroside Sulfate Activator - Dispersin - SAP-1 - SAP1 - SAPB - Saposin B - Sphingolipid Activator Protein 1 - Sphingolipid Activator Protein-1 - Sulfatide/GM1 Activator