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. 1991 Aug;65(8):4475–4479. doi: 10.1128/jvi.65.8.4475-4479.1991

Adenovirus homologous recombination does not require expression of the immediate-early E1a gene.

L H Epstein 1, C S Young 1
PMCID: PMC248888  PMID: 1830115

Abstract

To investigate whether early genes other than those involved directly in DNA replication are required for efficient adenovirus recombination, pairs of viruses with deletions in E1a, E1b 496R, E1b 196R, or E4 and containing differing restriction site markers were used to infect both permissive and non- or semipermissive cells. Recombination was assayed among intracellular and extracellular genomes by restriction digestion and blot hybridization. Recombination was delayed in infections of nonpermissive cells with E1a- viruses until a time consistent with the late onset of DNA replication characteristic of the cell type. This shows that E1a expression is not absolutely required for adenovirus recombination. Similar tests with deletion mutations in E1b and E4 also show that these genes are not required for efficient recombination. Taken together with earlier results showing that recombination depends on DNA replication, it is likely that adenovirus recombination is a consequence of cellular repair functions acting on the substrates produced by replication.

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Selected References

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