Mechanism and regulation of mycobactin fatty acyl-AMP ligase FadD33

Abstract

Background: Fatty acyl-AMP ligase FadD33 is required for mycobactin biosynthesis. Results: FadD33 catalyzes a two-step kinetic mechanism, and FadD33 activity is regulated by post-translational acetylation. Conclusion: Mycobactin FadD33 activity is reversibly regulated by Pat (acetylation) and DAc1 (deacetylation). Significant: Post-translational regulation via acetylation of enzymes can modulate siderophore biosynthesis. © 2013 by The American Society for Biochemistry and Molecular Biology, Inc.