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    • 2. 发明公开
    • NOVEL GENE TARGETING METHOD
    • 新型基因靶向方法
    • EP3290518A1
    • 2018-03-07
    • EP16785983.4
    • 2016-04-29
    • Hangzhou Genekine Biotech Co., Ltd
    • JIANG, YouweiLI, Yunfei
    • C12N15/11C12N1/16C12P21/00
    • C12N15/905C12N1/16C12N9/1241C12N15/11C12N15/902C12N2800/30C12P21/00C12N15/102C12Q2521/507
    • Provided are a novel two-step gene targeting method and a nucleotide construct for gene targeting. The method can improve the gene targeting efficiency and accurately identify a target gene knock-out mutant. The method of the present invention comprises: firstly, efficiently replacing a target gene in a genome with a targeting box by homologous recombination, the targeting box consisting of a target gene activity variant, a marker gene and site-specific recombination sites; and secondly, resecting the targeting box by recombinase, leaving a site-specific recombination site on the target gene to generate a target gene knock-out mutant, and removing a recombinase expression vector from the knock-out mutant by using a counter selection marker in the recombinase expression vector.
    • 提供了一种新的两步基因靶向方法和用于基因靶向的核苷酸构建体。 该方法可以提高基因靶向效率并准确鉴定靶基因敲除突变体。 本发明的方法包括:首先通过同源重组,有效置换基因组中的靶基因,所述靶向盒由靶基因活性变异体,标记基因和位点特异性重组位点组成; 其次,通过重组酶切除靶向盒,在靶基因上留下位点特异性重组位点以产生靶基因敲除突变体,并通过使用中的计数选择标记从敲除突变体中去除重组酶表达载体 重组酶表达载体。