Macropodid herpesvirus 1 encodes genes for both thymidylate synthase and ICP34.5.

Abstract:

:Macropodid herpesvirus 1 (MaHV-1) is an unclassified alphaherpesvirus linked with the fatal infections of kangaroos and other marsupials. During the characterisation of the internal repeat region of MaHV-1, an open reading frame (ORF) encoding for thymidylate synthase (TS) gene was identified and completely sequenced. Southern blot analysis confirmed the presence of two copies of the TS gene in the MaHV-1 genome as expected. Computer analysis of the TS ORF showed it was 948 nucleotides in length. A putative polyadenylation signal was identified 17-22 bp inside the ORF implying a minimal or absent 3' untranslated region. The predicted polypeptide was 316 amino acid residues in length and contained the highly conserved motifs for folate binding and F-dUMP binding, typical of all TS enzymes. Interestingly, MaHV-1 TS polypeptide had highest similarity to the human TS polypeptide (81%) compared to the TS polypeptides of other herpesviruses (72-75%). Immediately upstream of the TS gene, a second ORF of 510 bp, encoding a polypeptide with 170 amino acid residues, was identified. The carboxyl domain of this MaHV-1 polypeptide shared 68% similarity to a 59 amino acid motif of human herpesvirus 1 ICP34.5, identifying it as the MaHV-1 ICP34.5 homologue. This is the first report of a herpesvirus that encodes for both TS and ICP34.5.

journal_name

Virus Genes

journal_title

Virus genes

authors

Guliani S,Polkinghorne I,Smith GA,Young P,Mattick JS,Mahony TJ

doi

10.1023/a:1015396430131

subject

Has Abstract

pub_date

2002-06-01 00:00:00

pages

207-13

issue

3

eissn

0920-8569

issn

1572-994X

journal_volume

24

pub_type

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