English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/149845
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:


Conformational plasticity of RepB, the replication initiator protein of promiscuous streptococcal plasmid pMV158

AuthorsBoer, Roeland ; Ruiz-Masó, José A. ; Rueda, Manuel; Petoukhov, Maxim V.; Machón, Cristina ; Svergun, Dmitri I.; Orozco, Modesto; Solar, Gloria del ; Coll, Miquel
Issue Date15-Feb-2016
PublisherNature Publishing Group
CitationScientific Reports 6:20915 (2016)
AbstractDNA replication initiation is a vital and tightly regulated step in all replicons and requires an initiator factor that specifically recognizes the DNA replication origin and starts replication. RepB from the promiscuous streptococcal plasmid pMV158 is a hexameric ring protein evolutionary related to viral initiators. Here we explore the conformational plasticity of the RepB hexamer by i) SAXS, ii)sedimentation experiments, iii) molecular simulations and iv) X-ray crystallography. Combining these techniques, we derive an estimate of the conformational ensemble in solution showing that the C-terminal oligomerisation domains of the protein form a rigid cylindrical scaffold to which the N-terminal DNA-binding/catalytic domains are attached as highly flexible appendages, featuring multiple orientations. In addition, we show that the hinge region connecting both domains plays a pivotal role in the observed plasticity. Sequence comparisons and a literature survey show that this hinge region could exists in other initiators, suggesting that it is a common, crucial structural element for DNA binding and manipulation.
Description13 p.-7 fig.-1 tab.
Publisher version (URL)http://dx.doi.org/10.1038/srep20915
Appears in Collections:(CIB) Artículos
Files in This Item:
File Description SizeFormat 
srep2016.pdfArtículo principal1,97 MBAdobe PDFThumbnail
Show full item record
Review this work

Related articles:

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