Over the last several years topoisomerases have finally begun to yield
to high-resolution structural studies. These models have greatly aide
d our understanding of the mechanisms of topoisomerase catalysis and d
rug interactions. This review will cover advances in the structural bi
ology of topoisomerases and discuss their implications for topoisomera
se function. 0167-4781/98/$ - see front matter (C) 1998 Elsevier Scien
ce B.V. All rights reserved.