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Review
, 12 (6), 224-8

Genetic Manipulation of Genomes With Rare-Cutting Endonucleases

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Review

Genetic Manipulation of Genomes With Rare-Cutting Endonucleases

M Jasin. Trends Genet.

Abstract

DNA double-strand breaks (DSBs) pose a threat to the genomic integrity of a cell. The failure to heal a break or the inappropriate repair of a break can result in the loss of genetic information and other potentially deleterious consequences, such as chromosomal translocations. Recent developments using rare-cutting endonucleases have allowed investigators to introduce one or a few DSBs into complex genomes. Such studies have begun to elucidate the complex mechanisms of nonhomologous and homologous repair used by mammalian cells to repair these lesions. A key finding is that gene targeting is stimulated two to three orders of magnitude by a DSB at the target locus. Thus, the use of rare-cutting endonucleases and the co-opting of cellular repair mechanisms might provide scientists with another tool for engineering changes into genomes.

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