English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/170364
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:

Title

The ColE1 unidirectional origin acts as a polar replication fork pausing site

AuthorsViguera, Enrique; Hernandez, Pablo ; Krimer, Dora B. ; Boistov, Alexander S.; Lurz, Rudi; Alonso, Juan Carlos ; Schvartzman, Jorge Bernardo
KeywordsRibosomal-rna genes
SV40 DNA replication
Intertwined catenated dimers
Agarose-gel electrophoresis
Papillomavirus type-1 DNA
Escherichia-coli
Saccharomyces-cerevisiae
Plasmid replication
Potential origins
Bacillus-subtilis
Issue Date13-Sep-1996
PublisherAmerican Society for Biochemistry and Molecular Biology
CitationJ Biol Chem 271(37):22414-21 (1996)
AbstractCo-orientation of replication origins is the most common organization found in nature for multimeric plasmids. Streptococcus pyogenes broad-host-range plasmid pSM19035 and Escherichia coli pPI21 are among the exceptions. pPI21, which is a derivative of pSM19035 and pBR322, has two long inverted repeats, each one containing a potentially active ColE1 unidirectional origin. Analysis of pPI21 replication intermediates (RIs) by two-dimensional agarose gel electrophoresis and electron microscopy revealed the accumulation of a specific RI containing a single internal bubble. The data obtained demonstrated that initiation of DNA replication occurred at a single origin in pPI21. Progression of the replicating fork initiated at either of the two potential origins was transiently stalled at the other inversely oriented silent ColE1 origin of the plasmid. The accumulated RIs, containing an internal bubble, occurred as a series of stereoisomers with different numbers of knots in their replicated portion. These observations provide one of the first functional explanations for the disadvantage of head-to-head plasmid multimers with respect to head-to-tail ones.
Description9 p.-8 fig.
Publisher version (URL)http://dx.doi.org/10.1074/jbc.271.37.22414
URIhttp://hdl.handle.net/10261/170364
DOI10.1074/jbc.271.37.22414
ISSN0021-9258
E-ISSN1083-351X
Appears in Collections:(CIB) Artículos
Files in This Item:
File Description SizeFormat 
J. Biol. Chem.-1996-Viguera-22414-21.pdfArtículo principal571,57 kBAdobe PDFThumbnail
View/Open
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.