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Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-34147

Steiner, F; Zumsteg, A; Vogt, B; Ackermann, M; Schwyzer, M (2010). Bovine herpesvirus 5 BICP0 complements the bovine herpesvirus 1 homolog. Veterinary Microbiology, 143(1):37-44.

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Bovine herpesvirus 1 (BoHV-1) and BoHV-5 are closely related (82% amino acid identity) but differ strongly in neuropathogenesis. The immediate-early gene for BICP0 is less conserved (70% amino acid identity) and may contribute to a dissimilar phenotype. A peculiar difference is a guanosine hexamer in the BICP0-1 gene which aligns with only five guanosines in the BICP0-5 gene and therefore results in a frameshift in the latter open reading frame. Thus, the C-terminal amino acid sequence (residues 643–676 of BICP0-1 vs. 655–720 of BICP0-5) is completely different. We introduced the BICP0-5 frameshift into the BoHV-1 genome cloned as a bacterial artificial chromosome (BoHV-1 BAC) using the Red recombination system with galK selection and counterselection. Transfection of MDBK cells with the resulting BAC produced recombinant virus that replicated like wild type BoHV-1 in vitro. Attempts to exchange the entire BICP0-1 gene by the BoHV-5 homolog using the same approach failed repeatedly. Therefore, we cotransfected purified BICP0/galK+-BoHV-1 BAC DNA with a recombination plasmid coding for BICP0-5 with or without a HA tag into MDBK cells. BoHV-1 recombinants expressing the respective
proteins were characterized. In vitro, all recombinants grew to similar titers as the parental viruses, which demonstrates that BICP0-5 compensates for the growth defect of BICP0/galK+-BoHV-1 and functionally complements BICP0-1 of BoHV-1. We conclude that BICP0 may be suitable to positively select BoHV-1 recombinants with deletions or
insertions of additional genes of interest.


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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:05 Vetsuisse Faculty > Institute of Virology
Dewey Decimal Classification:570 Life sciences; biology
Date:16 June 2010
Deposited On:20 May 2010 12:52
Last Modified:05 Apr 2016 14:08
Additional Information:3rd Veterinary Herpesvirus Symposium of the European Society for Veterinary Virology (ESVV)
Publisher DOI:10.1016/j.vetmic.2010.02.012

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