Crystal structure of a novel heterooligomeric aminotransferase from Serratia sp. ATCC 39006 provides insights into function.

Serratia sp. ATCC 39006 has two tandemly positioned genes, ser4 and ser5, both annotated as sugar aminotransferases, in a putative secondary metabolite biosynthetic gene cluster. Ser5 possesses a complete fold-type I aminotransferase fold, while Ser4 lacks the N- and C-terminal regions and a catalytically important lysine residue of fold-type I aminotransferase.