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  • Title: Sequence and transcript analysis of the bovine herpesvirus 1 thymidine kinase locus.
    Author: Bello LJ, Whitbeck JC, Lawrence WC.
    Journal: Virology; 1992 Aug; 189(2):407-14. PubMed ID: 1322582.
    Abstract:
    A detailed sequence and transcript analysis of the thymidine kinase (tk) gene of bovine herpesvirus 1 (BHV1, Cooper strain) was carried out. A tk open reading frame (ORF) of 1077 bp was identified and compared with tk ORFs previously published for other strains of BHV1. The Cooper sequence was in good agreement with that of strain Q3932 but differed significantly from strains 6660 and LA. Reanalysis of the LA tk sequence, however, failed to confirm this difference. Except for five single base substitutions, our results indicate that the Cooper, Q3932, and LA strains share the same tk sequence. The size of the tk mRNA was determined by Northern blot analysis. In contrast to the size of other herpesvirus tk mRNAs (approximately 1.5 kb), the BHV1 tk transcript was 4.3 kb. Northern blot analysis indicated that the tk transcript was 3' coterminal with the downstream 3.1-kb transcript which encodes a BHV1 homologue of the HSV1 H glycoprotein (gH). The 5' ends of the tk and gH mRNAs were mapped by S1 analysis to positions 135 and 91 bp upstream of their respective translation start sites. The 5' end of the tk transcript was found to overlap a 5.2-kb transcript with opposite polarity to the tk mRNA.
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