In enzymology, a peptide alpha-N-acetyltransferase () is an enzyme that catalyzes the chemical reaction acetyl-CoA + peptide Nalpha-acetylpeptide + CoA Thus, the two substrates of this enzyme are acetyl-CoA and peptide, whereas its two products are Nalpha-acetylpeptide and CoA. This enzyme belongs to the family of transferases, specifically those acyltransferases transferring groups other than aminoacyl groups. The systematic name of this enzyme class is acetyl-CoA:peptide Nalpha-acetyltransferase. Other names in common use include beta-endorphin acetyltransferase, peptide acetyltransferase, protein N-terminal acetyltransferase, NAT, Nalpha-acetyltransferase, amino-terminal amino acid-acetylating enzyme, and acetyl-CoA:peptide alpha-N-acetyltransferase. Structural studies As of late 2007, two structures have been solved for this class of enzymes, with PDB accession codes and . References EC 2.3.1 Enzymes of known structure