English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/116971
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

DC FieldValueLanguage
dc.contributor.authorTrigueros, Sonia-
dc.contributor.authorSalceda, Javier-
dc.contributor.authorBermúdez, Ignacio-
dc.contributor.authorFernàndez, Xavier-
dc.contributor.authorRoca, Joaquim-
dc.date.accessioned2015-06-22T11:12:15Z-
dc.date.available2015-06-22T11:12:15Z-
dc.date.issued2004-01-16-
dc.identifierdoi: 10.1016/j.jmb.2003.11.011-
dc.identifierissn: 0022-2836-
dc.identifier.citationJournal of Molecular Biology 335(3): 723-731 (2004)-
dc.identifier.urihttp://hdl.handle.net/10261/116971-
dc.description.abstractType-IIA topoisomerases consume ATP as they catalyse the interconversion of DNA topoisomers by transporting one DNA segment through a transient break in another. It remains unclear how their activity simplifies the topology of DNA below equilibrium values. Here we report that eukaryotic topoisomerase II narrows the thermal distribution of DNA supercoils, by mainly removing negative DNA crossings. Surprisingly, this asymmetry in supercoil removal is not due to deformation of the DNA before strand passage. Topoisomerase II neither bends nor alters the helical conformation of the interacting DNA. Rather, it appears to interact with a third DNA segment, in addition to the gated and the transported segments. Remarkably, the simultaneous interaction with three DNA segments accounts for the asymmetric removal of supercoils in relaxed DNA and gives a clue to how topoisomerase II simplifies the topology of DNA against the thermal drive. © 2003 Elsevier Ltd. All rights reserved.-
dc.description.sponsorshipThis study was supported by grants PB98-0487 and BMC2002-03275 from the Spanish Ministry of Science and Technology-
dc.publisherAcademic Press-
dc.rightsclosedAccess-
dc.subjectDNA binding-
dc.subjectDNA topology-
dc.subjectSupercoiled DNA-
dc.subjectTopoisomerase-
dc.subjectDNA bend-
dc.titleAsymmetric removal of supercoils suggests how topoisomerase II simplifies DNA topology-
dc.typeartículo-
dc.identifier.doi10.1016/j.jmb.2003.11.011-
dc.relation.publisherversionhttp://dx.doi.org/10.1016/j.jmb.2003.11.011-
dc.date.updated2015-06-22T11:12:15Z-
dc.description.versionPeer Reviewed-
dc.language.rfc3066eng-
Appears in Collections:(IBMB) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
View/Open
Show simple item record
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.