Fig. 1.

Crystal structure of AaMacB with bound ATP. (A) Overall structure of the MacB dimer. (B) Linear domain organization of the MacB polypeptide. (C) Topology of MacB. (D) Location of the two ATP molecules (yellow) clamped between the NBDs. (E) Detailed view of bound ATP with omit map density contoured at 3.5 sigma (teal). Residues interacting with ATP are labeled and potential hydrogen bonds (dashed yellow lines) are indicated. Coloring is consistent across the figure: one monomer is shown in gray and the second is colored according to the domain arrangement.