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d(GA x TC)(n) microsatellite DNA sequences enhance homologous DNA recombination in SV40 minichromosomes

AuthorsBenet, Ariadna; Mollà, Gemma; Azorín, Ferran
Issue Date1-Dec-2000
PublisherOxford University Press
CitationNucleic Acids Research 28(23):4617-22 (2000)
AbstractThe genomic distribution of the abundant eukaryotic d(GA x TC)(n) DNA microsatellite suggests that it could contribute to DNA recombination. Here, it is shown that this type of microsatellite DNA sequence enhances DNA recombination in SV40 minichromosomes, the rate of homologous DNA recombination increasing by as much as two orders of magnitude in the presence of a d(GA x TC)(22) sequence. This effect depends on the region of the SV40 genome at which the d(GA x TC)(22) sequence is cloned. It is high when the sequence is located proximal to the SV40 control region but no effect is observed when located 3.5 kb away from the SV40 ori. These results indicate that the recombination potential of d(GA x TC)(n) sequences is likely linked to DNA replication and/or transcription. The potential contribution of the structural properties of d(GA x TC)(n) sequences to this effect is discussed.
Description6 pages, 4 figures, 1 table.-- PMID: 11095670 [PubMed].-- PMCID: PMC115175.
Publisher version (URL)http://dx.doi.org/10.1093/nar/28.23.4617
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