Bifunctional protein that plays an essential role in virulence. Plays a role in both the production of the siderophore anguibactin and the regulation of iron transport genes (By similarity). Siderophore biosynthesis; anguibactin biosynthesis. Belongs to the ATP-dependent AMP-binding enzyme family. Lacks the conserved Ser at position 1000 required for covalent attachment of 4-phosphopantetheine.