NDLI: Recombinational construction in Escherichia coli of infectious adenoviral genomes

Content Provider	PubMed Central
Author	Crouzet, Joël Naudin, Laurent Orsini, Cécile Vigne, Emmanuelle Ferrero, Lucy Roux, Aude Le Benoit, Patrick Latta, Martine Torrent, Christophe Didier, Branellec Patrice, Denèfle Jean-françois, Mayaux Michel, Perricaudet Yeh, Patrice
Copyright Year	1997
Abstract	A two-step gene replacement procedure was developed that generates infectious adenoviral genomes through homologous recombination in Escherichia coli. As a prerequisite, a human adenovirus serotype 5 (Ad5)-derived genome was first introduced as a PacI restriction fragment into an incP-derived replicon which, in contrast to ColE1-derivatives (e.g., pBR322 or pUC plasmids), is functional in a polA mutant of E. coli. Any modification can be introduced at will following two consecutive homologous recombinations between the incP/Ad5 replicon and the ColE1 plasmid. The overall procedure requires only the in vitro engineering of the ColE1-derivative by flanking the desired modification with small stretches of identical sequences. In the first step, a cointegrate between the tetracycline-resistant incP/Ad5 replicon and the kanamycin-resistant ColE1-derivative is selected by growing the polA host in the presence of both antibiotics. Resolution of this cointegrate is further selected in sucrose growth conditions due to the loss of a conditional suicide marker (the sacB gene of Bacillus subtilis) present in the ColE1 plasmid, leading to unmodified and modified incP/Ad5 replicons that can be differentiated upon restriction analysis. Consecutive rounds of this two-step cloning procedure allowed the introduction of multiple independent modifications within the virus genome, with no requirement for an intermediate virus. The potential of this procedure is demonstrated by the recovery of several E1E3E4-deleted adenoviruses following transfection of the corresponding E. coli-derived genomes in IGRP2 cells.
Starting Page	1414
File Format	PDF
ISSN	10916490
e-ISSN	10916490
Journal	Proceedings of the National Academy of Sciences of the United States of America
Issue Number	4
Volume Number	94
Language	English
Publisher	The National Academy of Sciences of the USA
Publisher Date	1997-02-18
Access Restriction	Open
Rights Holder	The National Academy of Sciences of the USA
Subject Keyword	Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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