NDLI: The Reading Frame BPLF1 of Epstein-Barr Virus: A Homologue of Herpes Simplex Virus Protein VP16

Content Provider	Springer Nature Link
Author	Schmaus, Susanne Wolf, Hans Schwarzmann, Fritz
Copyright Year	2004
Abstract	The open reading frame BPLF1 of Epstein-Barr virus (EBV) shows homology to the Herpes simplex virus 1 (HSV1) protein VP16. This protein is a structural tegument component playing a pivotal role for HSV replication as trans-activator of viral immediate-early genes. An EBV gene with a comparable function has not been described so far. However, computer analysis indicated that BPLF1 may be a tegument protein homologous to VP16. This is the first report on the characterisation of the BPLF1 gene, its transcription, and expression of its gene product in vitro and in vivo. Using RT-PCR and Northern blot assays we demonstrated that the BPLF1 gene belongs to the class of late lytic cycle genes of EBV. Besides a full length transcript of 9.5 kb also a polyadenylated transcript of approximately 3 kb is synthesised. However, no consensus splice sites could be identified. Northern blot experiments using partially overlapping probes and sequencing of a BPLF1-specific cDNA revealed 1,550 nucleotides of the BPLF1 transcript, collinear in sequence with the viral genome from position 64547 to 66097. A recombinant Western blot assay detected BPLF1-specific antibodies in seropositive individuals, in particular in cases with elevated viral replication like infectious mononucleosis, chronic active infection, and nasopharyngeal carcinoma. This demonstrated expression of the BPLF1 protein in vivo. Thus, experimental data and computer analysis strongly support the hypothesis of BPLF1 being a tegument protein of the EBV homologous to VP16 of HSV1 and ORF22 of Varicella zoster virus.
Starting Page	267
Ending Page	277
Page Count	11
File Format	PDF
ISSN	09208569
Journal	Virus Genes
Volume Number	29
Issue Number	2
e-ISSN	1572994X
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2004-01-01
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Medical Microbiology Virology Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Virology Genetics Medicine Molecular Biology

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