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. 1984 Jun;50(3):678–683. doi: 10.1128/jvi.50.3.678-683.1984

Random and nonrandom integration of a polyomavirus DNA molecule containing highly repetitive cellular sequences.

J C Wallenburg, A Nepveu, P Chartrand
PMCID: PMC255724  PMID: 6327998

Abstract

RmI is a circular DNA molecule that consists of a complete polyomavirus genome with an insertion (Ins) of mouse cellular DNA. This polyomavirus genome carries a mutation which renders its replication, but not its transforming ability, temperature sensitive. Ins contains both unique and repetitive cellular DNA sequences. We transfected RmI into rat cells at the permissive and nonpermissive temperatures for replication and isolated clones that had integrated RmI in their genomes. In this paper, we describe detailed mapping of the integrated RmI sequences present in 37 different cell clones. Our results indicated that transfection at the permissive temperature resulted in a random integration pattern, whereas transfection at the nonpermissive temperature resulted in a nonrandom integration pattern. The nonrandom insertions had a preferential length and preferential endpoints. We argue from these results that the nonrandom integration pattern is related to the presence of Ins and that the switch between nonrandom integration and random integration reflects a modification of the integrating substrate. When both are active, the random mechanism dominates the nonrandom mechanism.

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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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