2009
DOI: 10.1038/nsmb.1604
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Structural insight into the quinolone–DNA cleavage complex of type IIA topoisomerases

Abstract: Type II topoisomerases alter DNA topology by forming a covalent DNA-cleavage complex that allows DNA transport through a double-stranded DNA break. We present the structures of cleavage complexes formed by the Streptococcus pneumoniae ParC breakage-reunion and ParE TOPRIM domains of topoisomerase IV stabilized by moxifloxacin and clinafloxacin, two antipneumococcal fluoroquinolones. These structures reveal two drug molecules intercalated at the highly bent DNA gate and help explain antibacterial quinolone acti… Show more

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Cited by 263 publications
(298 citation statements)
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“…This observation indicates that two modes of drug binding occur in gyrase-containing cleaved complexes. To date, only one binding mode has been observed using x-ray crystallography (11)(12)(13)(14)(15); however, a second was anticipated from quinolone structure-activity relationships obtained with cultured M. smegmatis (19). Below we briefly discuss the methodology used to probe drug-topoisomerase interactions and present models for drug binding in gyrase-containing cleaved complexes.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…This observation indicates that two modes of drug binding occur in gyrase-containing cleaved complexes. To date, only one binding mode has been observed using x-ray crystallography (11)(12)(13)(14)(15); however, a second was anticipated from quinolone structure-activity relationships obtained with cultured M. smegmatis (19). Below we briefly discuss the methodology used to probe drug-topoisomerase interactions and present models for drug binding in gyrase-containing cleaved complexes.…”
Section: Discussionmentioning
confidence: 99%
“…X-ray crystallography of gyrase and topoisomerase IV complexed with DNA and quinolone-class molecules provides a basis for understanding interactions between the inhibitors and their target enzymes (11)(12)(13)(14)(15). Gyrase is a tetramer composed of two GyrA and two GyrB subunits (the corresponding topoisomerase IV subunits are termed ParC and ParE (16)).…”
mentioning
confidence: 99%
“…According with our results, biochemistry research [32] indicated that, norfloxacin almost did not bind with gyrase or DNA when only one of them existed; but a large number of norfloxacin was bound if both existed. Moreover, biochemistry research [33] and crystal structure [34] showed that norfloxacin together with DNA and gyrase formed a stable complex where norfloxacin bound near active site of GyrA Tyr122 and interact with GyrB and DNA. Besides, gyrase could change the geometric scale of DNA supercoils, yielding chiral differences, clearly indicating that it has different effects on positive and negative supercoils.…”
Section: Discussionmentioning
confidence: 99%
“…Субъединицы GyrB/ParE содержат N-терминальный домен, обладающий АТФазной активностью, а так-же C-терминальный домен, ответственный за взаи модействие с ДНК. Связывание гиразы с фторхинолонами определяется первую оче-редь полярными аминокислотными остатка-ми в наружной области «карманов» белковых молекул, в которых находятся активные цент-ры субъединиц GyrA и ParC [45,51,69]. Ами-нокислотные остатки C-концевого домена субъединиц GyrB и ParE расположены в участ-ке, локализующемся вблизи белкового «кар-мана» GyrA/ParC, где связываются фторхино-лоны, и их замены могут снижать восприим-чивость к фторхинолонам за счет изменения конформации мишени [51,69] (рис.…”
Section: гираза и топоизомераза IVunclassified