Abstract:
:Kaposi's sarcoma-associated herpesvirus (KSHV) is a member of the Gammaherpesvirinae and is causally associated with Kaposi's sarcoma, primary effusion lymphoma, and multicentric Castleman's disease. The KSHV genome encodes over 85 genes; the function of some is entirely unknown. We have characterized the transcriptional regulation of a conserved and uncharacterized Gammaherpesvirinae open reading frame, orf35, which lies in a cluster of several overlapping genes, orf34 to orf38. We identified the transcription start site and analyzed upstream sequences. We found that expression of the KSHV lytic replication and transcription activator (RTA) strongly increased the orf35 promoter activity through a 46-nucleotide region which includes a conserved AP-1 binding site. Electrophoretic mobility shift assay demonstrated direct binding of cJUN and cFOS to the predicted AP-1 binding site. Finally, using a mutated promoter lacking the AP-1 site and dominant-negative cFOS, we established that the RTA-mediated orf35 transactivation is AP-1-dependent.
journal_name
Virologyjournal_title
Virologyauthors
Masa SR,Lando R,Sarid Rdoi
10.1016/j.virol.2007.08.023subject
Has Abstractpub_date
2008-02-05 00:00:00pages
14-31issue
1eissn
0042-6822issn
1096-0341pii
S0042-6822(07)00554-5journal_volume
371pub_type
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