Figure 1.

C-terminal domain rotation upon MgATP binding and position of mutations in RpMatB. Overlaid structures of RpMatB in the absence (orange) and presence (blue) of ATP,⁴ showing the movement of the C-terminal (lid) domain in dark colors. The N-terminal domains (amino acids 1–399) are in light colors, and MgATP is shown in black. The positions of mutations are shown as spheres. For clarity, the positions of mutations C106A and R286C are only shown in the apo conformation.