Bello, L.J., Davison, A.J., Glenn, M.A., Whitehouse, A., Rethmeier, N., Schulz, T.F., and Barklie Clements, J. (1999) The human herpesvirus-8 ORF 57 gene and its properties. Journal of General Virology, 80 (12). pp. 3207-15. ISSN 0022-1317
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Publisher's URL: http://vir.sgmjournals.org/content/80/12/3207.abstract
Human herpesvirus-8 (HHV-8) is a gamma(2) lymphotropic herpesvirus associated with Kaposi's sarcoma, a major neoplasm of AIDS patients, and with other AIDS-related neoplasms. The HHV-8 ORF 57 gene is conserved throughout the herpesvirus family and has a herpes simplex virus type 1 homologue, IE63 (also termed ICP27), which is an essential regulatory protein and acts at both transcriptional and post-transcriptional levels. We show that, contrary to the published HHV-8 sequence, which predicts a protein of 275 amino acids, the ORF 57 gene is spliced, contains a single intron and encodes a protein of 455 amino acids. For several gammaherpesviruses examined, the upstream coding exon is 16-17 amino acids in length and is rich in methionine residues. When ORF 57 was fused to the gene for enhanced green fluorescent protein (EGFP), the fusion protein exhibited a punctate nuclear distribution that co-localized with the cellular splicing factor SC-35. Unlike the IE63-EGFP fusion protein, ORF 57-EGFP did not shuttle from the nucleus to the cytoplasm in the presence of actinomycin D. However, ORF 57-EGFP was capable of shuttling from a transfected monkey nucleus to a recipient mouse nucleus in an interspecies heterokaryon assay. These data indicate that HHV-8 ORF 57 and IE63 possess certain common properties.
|Glasgow Author(s):||Davison, Dr Andrew|
|Authors:||Bello, L.J., Davison, A.J., Glenn, M.A., Whitehouse, A., Rethmeier, N., Schulz, T.F., and Barklie Clements, J.|
|College/School:||College of Medical Veterinary and Life Sciences > Institute of Infection Immunity and Inflammation|
|Journal Name:||Journal of General Virology|
|Journal Abbr.:||J. Gen. Virol.|
|Publisher:||Society for General Microbiology|