Figure 3From: Mutation of L-2,3-diaminopropionic acid synthase genes blocks staphyloferrin B synthesis in Staphylococcus aureusProposed schemes for SbnA- and SbnB-dependent synthesis of L-Dap. Scheme A is adapted from Thomas et al. [18] for which the functions of SbnA and SbnB are analogous to the proposed functions VioB and VioK, respectively. The proposed functions of SbnA in schemes B-D remain as a β-replacement enzyme while SbnB is proposed to be an NAD+-dependent dehydrogenase of the indicated amino acid.Back to article page