The genome of bovine adenovirus type 3 (BAV3) is flanked by 195-base pair (bp) inverted terminal repeats (ITR). We isolated a BAV3 mutant (BAV3c29) having an internal deletion within the left ITR. The deletion eliminated 72 bp between nucleotides (nt) 89 and 162, including most of the GC-rich sequences located close to the end of the ITR sequences. This deletion did not seem to have any affect on the virus plaque size or morphology and the kinetics of viral replication compared to wild-type (wt) BAV3. The nt sequence of the right ITR of BAV3c29 remained identical to the right or left ITR of wt BAV3. These results indicate that the cis-acting sequences present within the 72 bp between nt 89 and 162 of the left ITR are not essential for BAV3 DNA replication in cultured cells.
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| http://dx.doi.org/10.1159/000065871 | DOI Listing |
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