Two regions of the Epstein-Barr virus (EBV) genome carrying partially homologous clusters of short tandem repeats (NotI and PstI repeats) flanked by 1044 and 1045 base pairs with almost complete homology (DL and DR, left and right duplication, respectively) were most abundantly transcribed into poly(A)+ mRNA after induction with the tumor promoter 12-O-tetradecanoyl-phorbol-13-acetate. The nucleotide sequence of both repeat clusters and the conserved upstream regulatory sequences from the M-ABA EBV strain are presented. Nearly the whole part of the sequences coding for the RNAs is covered by the NotI and PstI repeats, respectively. The regulatory sequences for these genes are located in the homologous regions of 1044 and 1045 base pairs (DL and DR, respectively). A CAAT box, a TATA box, and other herpes simplex virus-like elements were identified for both transcription units. The initiation points and the 3' ends of both inducible RNAs were mapped by S1 nuclease analysis. Both genes have open reading frames and may potentially code for proteins with repetitive amino acid compositions. The structure of these two inducible EBV genes is discussed, and an evolutionary model is proposed for the generation of gene duplication in the M-ABA strain of EBV.
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| http://dx.doi.org/10.1128/JVI.56.3.987-995.1985 | DOI Listing |
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