Figure 6 - full size

Figure 6.
Fig. 6. A hypothetical model describing transitions of ClpA subunits in solution to form a spiral in crystal in the presence of ADP and to assemble into a planar hexamer in solution in the presence of ATP. ClpA subunits are postulated to undergo an open and a closed conformation by rotating D2 with respect to D1 via the hinge between two domains.