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    • 28. 发明申请
    • SITE-SPECIFIC INTEGRATION AND STACKING OF TRANSGENES IN SOYBEAN VIA DNA RECOMBINASE MEDIATED CASSETTE EXCHANGE
    • 通过DNA重组体介导的CASSETTE交换的大豆的特异性整合和转化大肠杆菌
    • WO2010080430A1
    • 2010-07-15
    • PCT/US2009/068215
    • 2009-12-16
    • E. I. DU PONT DE NEMOURS AND COMPANYFALCO, Saverio, CarlLI, Zhongsen
    • FALCO, Saverio, CarlLI, Zhongsen
    • C12N15/82A01H5/00A01H5/10
    • C12N15/8213
    • A targeting method is described that allows precise cassette replacement at a previously characterized genetic locus. A target DNA construct containing a pair of incompatible FRT sites flanking a target cassette was introduced into soybean by regular biolistic transformation. Transgenic events containing a single complete copy of the target site were then selected and retransformed with a donor DNA construct containing the identical pair of incompatible FRT sites flanking a donor cassette. Precise DNA cassette exchange happened between the target cassette and the donor cassette via recombinase mediated cassette exchange (RMCE) so that the donor cassette was introduced at the exact genomic site previously occupied by the target cassette. Through repeated RMCE using additional incompatible FRT sites, multiple groups of transgenes can be stacked at the same genomic locus.
    • 描述了靶向方法,其允许在先前表征的遗传基因座处进行精确的盒替换。 通过常规的生物弹性转化,将含有目标盒侧翼的一对不相容的FRT位点的靶DNA构建体引入大豆。 然后选择含有单个完整拷贝的靶位点的转基因事件,并用含有供体盒侧翼的相同对不对称FRT位点的供体DNA构建体重新转化。 通过重组酶介导的盒式交换(RMCE)在靶盒和供体盒之间发生精确的DNA盒交换,使得供体盒被导入到由靶盒预先占据的确切基因组位点。 通过反复RMCE使用额外的不相容的FRT位点,可以在相同的基因组座位堆叠多组转基因。