Role of the fowlpox virus thymidine kinase genefor the growth of FPV recombinants in cell culture

Role of the fowlpox virus thymidine kinase genefor the growth of FPV recombinants in cell culture Fowlpox virus (FPV) insertion plasmids were constructed that, upon integration into the viral genome via in-vivo recombination, inactivate the viral thymidine kinase ( tk ) gene. Using this approach, no wild-type virus-free stocks of recombinant virus could be obtained. In contrast, either integration of foreign genes into the intergenic region of the intact FPV tk gene and the open reading frame located downstream, or the functional substitution of the inactivated FPV tk gene by an intact vaccinia virus tk gene resulted in the predicted stable recombinants that were free of wild-type virus. Our results suggest that in already highly attenuated poxvirus strains an intact tk gene is essential for efficient growth of the virus in cell culture. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Archives of Virology Springer Journals

Role of the fowlpox virus thymidine kinase genefor the growth of FPV recombinants in cell culture

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Publisher
Springer Journals
Copyright
Copyright © Wien by 1997 Springer-Verlag/
Subject
Legacy
ISSN
0304-8608
eISSN
1432-8798
D.O.I.
10.1007/s007050050252
Publisher site
See Article on Publisher Site

Abstract

Fowlpox virus (FPV) insertion plasmids were constructed that, upon integration into the viral genome via in-vivo recombination, inactivate the viral thymidine kinase ( tk ) gene. Using this approach, no wild-type virus-free stocks of recombinant virus could be obtained. In contrast, either integration of foreign genes into the intergenic region of the intact FPV tk gene and the open reading frame located downstream, or the functional substitution of the inactivated FPV tk gene by an intact vaccinia virus tk gene resulted in the predicted stable recombinants that were free of wild-type virus. Our results suggest that in already highly attenuated poxvirus strains an intact tk gene is essential for efficient growth of the virus in cell culture.

Journal

Archives of VirologySpringer Journals

Published: Dec 1, 1997

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