The enzyme is found in some methanogenic archaea and bacteria. In archaea it is induced under salt stress. The product, N6-acetyl-beta-L-lysine, serves as a compatible solute, conferring high salt resistance on the producing organisms.
Pfluger K, Baumann S, Gottschalk G, Lin W, Santos H, Muller V
Lysine-2,3-aminomutase and beta-lysine acetyltransferase genes of methanogenic archaea are salt induced and are essential for the biosynthesis of Nepsilon-acetyl-beta-lysine and growth at high salinity.