PSAT1 encodes the human gene, Phosphoserine aminotransferase 1. It may also be known as: Phosphoserine aminotransferase; PSAT; Phosphohydroxythreonine aminotransferase; Phosphoserine aminotransferase ; EPIP; NLS2; PSATD. The encoded protein is an enzyme with an amino acid length of 370 and a mass of 40.4 kDa. Other isoforms may exist. PSAT1 is a member of the Class-V pyridoxal-phosphate-dependent aminotransferase family, SerC subfamily. Homologs of this gene exist in other organisms, including: Mouse, Rat, Arabidopsis, Zebrafish, Frog, Chicken.