Diamine N-acetyltransferase 1(or Spermidine/spermine-N1-acetyltransferase, SSAT1), as known as SAT-1, is a polyamine catabolic enzyme which catalyzes the acetylation of polyamines. This protein plays an important role in polyamine homoeostasis, since acetylated products are either excreted from the cell or oxidized by acetylpolyamine oxidase.