ID 6.3.2.57 DE staphyloferrin A synthase. CA ATP + citrate + N(5)-[(S)-citryl]-D-ornithine = AMP + diphosphate + H(+) CA + staphyloferrin A. CC -!- Requires Mg(2+). CC -!- The enzyme, characterized from the bacterium Staphylococcus aureus, CC catalyzes the last step in the biosynthesis of the siderophore CC staphyloferrin A. CC -!- It belongs to a class of siderophore synthases known as type A CC nonribosomal peptide synthase-independent synthases (NIS). CC -!- Type A NIS enzymes are responsible for the formation of amide or CC ester bonds between polyamines or amino alcohols and a prochiral CC carboxyl group of citrate. CC -!- The enzyme forms a citrate adenylate intermediate prior to ligation. DR Q2FW72, SFNAB_STAA8; //