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Replication of DNA containing apurinic sites in human and mouse cells probed with parvoviruses MVM and H-1.

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PMC
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  • Research Article

Abstract

We studied the effect of apurinic sites on DNA replication in mouse and human cells, using parvoviruses MVM (minute virus of mice) and H-1 as probes. Although apurinic sites are efficient blocks to the replication of these single-stranded DNA viruses in vivo, depurinated parvoviruses can be reactivated if host cells have been preexposed to a subtoxic dose of UV light. The target of this conditional reactivation process is the conversion of depurinated input DNA into double-stranded replicative forms; the concomitant increase in viral mutagenesis strongly suggests that apurinic sites can be bypassed in mammalian cells.

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