Analysis of spacer regions derived from intramolecular recombination between heterologous loxP sites.
Jung, UJ; Park, S; Lee, G; Shin, HJ; Kwon, MH
Biochemical and biophysical research communications, 363(1):183-189, 2007
Biochemical and biophysical research communications
In Cre-loxP recombination system, Cre recombinase binds cooperatively to two 13bp inverted repeats in a 34bp loxP and catalyzes strand exchange in the 8bp spacer region. Up to date, spacer sequences within the recombined loxP sites derived from two loxP sties that have different 8bp spacer regions have never been analyzed. In the present study, we analyzed the spacer sequences within the recombined products, resulted from intramolecular recombination between heterologous loxP sites including M2, M3, M7, M11, and 2272 in vivo and in vitro. From the analyses, it was found that loxP sites with aberrant 8bp spacers can be generated from Cre-mediated recombination between heterologous loxP sites at significantly high frequency, proposing the possibility that recombination between heterologous loxP sites would have not undergone typical formula of Cre-loxP recombination.
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