Albonoursin synthase

UniProtKB accession:  Q8GED9

Grouped By:  Matching UniProtKB accession

UniProtKB description:  Involved in the biosynthesis of albonoursin (cyclo[(alpha,beta-dehydro-Phe)-(alpha,beta-dehydro-Leu)]), an antibacterial peptide. Catalyzes the formation of alpha,beta-dehydro-Phe (DPhe) and alpha,beta-dehydro-Leu (DLeu) residues during the biosynthesis of albonoursin. The catalytic reaction of cyclo(L-Phe-L-Leu) occurs in a two-step sequential alpha-beta-dehydrogenation leading first to cyclo(alpha,beta-dehydro-Phe-L-Leu) and finally to albonoursin. Can also use cyclo(L-Phe-L-His), cyclo(L-Trp-L-Trp), cyclo(L-Leu-L-Ala), cyclo(L-Phe-Gly), cyclo(L-Leu-Gly), cyclo(L-Ser-Gly) and cyclo(L-Glu-Gly) as substrate suggesting that the diketopiperazine ring is essential for the enzymatic reaction.