Figure 6 - full size

Figure 6.
Fig. 6. A view of the protein backbone for N-TIMP-2 (blue) and the N-MMP-3·TIMP-1 complex (red and white) showing the differences in structure between the bound and unbound forms of TIMP at the TIMP/MMP interaction site. The TIMP structures were superimposed using the coordinates of equivalent backbone atoms in the -barrel, and only the N-terminal domain of TIMP-1 is shown. The two zinc ions of the MMP-3 catalytic domain are shown in magenta (catalytic site zinc lower left). On the right-hand side of the figure the AB loop of TIMP-2 can clearly be seen extending far beyond the TIMP-1 AB loop to make numerous van der Waals clashes with the N-MMP-3 molecule. The difference in structure of the CD loops can be seen in the center of the figure. This figure was produced using MOLMOL (39).