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    • 140. 发明授权
    • Modified Cry3A toxins and nucleic acid sequences coding therefor
    • 修饰的Cry3A毒素及其编码的核酸序列
    • US08216806B2
    • 2012-07-10
    • US13189888
    • 2011-07-25
    • Eric ChenCheryl Stacy
    • Eric ChenCheryl Stacy
    • C12P21/06C07H21/02C07K14/00
    • C12N15/8286C07K14/325Y02A40/162
    • Methods for making a modified Cry3A toxin are disclosed. Such methods include the insertion of a protease recognition site that is recognized by a gut protease of a target insect, such as corn rootworm, into at least one position of a Cry3A toxin so that a modified Cry3A toxin is thus designed. The coding sequence of the modified Cry3A toxin may be transformed into a host cell and the host cell grown under conditions that allow the host cell to produce the modified Cry3A toxin. The host cell may be a plant cell and the plant may be comprised in a transgenic plant. Thus, the transgenic plant may be used to produce the modified Cry3A toxin.
    • 公开了制备修饰的Cry3A毒素的方法。 这样的方法包括将目标昆虫(例如玉米根虫)的肠蛋白酶识别的蛋白酶识别位点插入Cry3A毒素的至少一个位置,从而设计出修饰的Cry3A毒素。 修饰的Cry3A毒素的编码序列可以转化到宿主细胞中,宿主细胞在允许宿主细胞产生修饰的Cry3A毒素的条件下生长。 宿主细胞可以是植物细胞,并且植物可以包含在转基因植物中。 因此,转基因植物可用于产生经修饰的Cry3A毒素。