A domain insertion in Escherichia coli GyrB adopts a novel fold that plays a critical role in gyrase function.
Schoeffler, A.J., May, A.P., Berger, J.M.(2010) Nucleic Acids Res 38: 7830-7844
- PubMed: 20675723 
- DOI: 10.1093/nar/gkq665
- Primary Citation of Related Structures:  
3NUH - PubMed Abstract: 
DNA topoisomerases manage chromosome supercoiling and organization in all forms of life. Gyrase, a prokaryotic heterotetrameric type IIA topo, introduces negative supercoils into DNA by an ATP-dependent strand passage mechanism. All gyrase orthologs rely on a homologous set of catalytic domains for function; however, these enzymes also can possess species-specific auxiliary regions ...