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. 1985 Jan;53(1):302–305. doi: 10.1128/jvi.53.1.302-305.1985

Naturally occurring BK virus variants (JL and Dik) with deletions in the putative early enhancer-promoter sequences.

J ter Schegget, C J Sol, E W Baan, J van der Noordaa, H van Ormondt
PMCID: PMC255038  PMID: 2981352

Abstract

The genomes of two independently isolated BK virus (BKV) variants (JL and Dik) were compared with prototype BKV DNA by restriction endonuclease mapping and sequence analysis. Differences were mainly detected in two regions: the BKV (JL) and BKV (Dik) putative early enhancer-promoter regions and the middle of the T-antigen-coding regions. Base sequence analysis of these two regions showed the following. (i) The putative enhancer-promoter regions of BKV (Dik) and BKV (JL) contained only one 68-base-pair (bp) unit of the 68-bp triplication (the central copy of which is missing 18 bp) present in prototype BKV. (ii) In the same region, BKV (JL) and BKV (Dik) contained unique stretches of DNA 33 and 63 bp long, respectively. In these 63 bp, a sequence which was very similar to the proposed simian virus 40 enhancer core sequence (GGAGTGGAAAG) was present. (iii) The altered restriction endonuclease recognition sites in the sequenced part of the T-antigen-coding region of BKV (JL) and BKV (Dik) were due to base sequence changes, leaving the amino acid sequence unchanged.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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