Figure 3 - full size

 

Figure 3.
Figure 3 The C-terminal domain of reverse gyrase and its interaction with the N-terminal domain. (A) Superposition of the C-terminal domain with the 67-kDa catalytic fragment of E.coli topoisomerase I (Lima et al., 1994), shown in grey. The position of domains II and III of topoisomerase I correspond to the 'closed' form of the enzyme. A box encloses the region featured in (B). (B) Stereo view of reverse gyrase superimposed with domains II and III of topoisomerase I in the putative 'open' form (Feinberg et al., 1999). The catalytic Tyr in both enzymes is indicated in red space-filling representation. The arrow indicates the putative movement of reverse gyrase subdomains T2 and T3 during strand passage. This movement would be prevented by subdomain H3 in its current position.

The above figure is reprinted from an Open Access publication published by Macmillan Publishers Ltd: EMBO J (2002, 21, 418-426) copyright 2002.