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    • 10. 发明授权
    • Compositions encoding lepidopteran-toxic polypeptides and methods of use
    • 编码鳞翅目昆虫毒性多肽的组合物和使用方法
    • US06809078B2
    • 2004-10-26
    • US09972175
    • 2001-10-05
    • James A. BaumAmy Jelen GilmerAnne-Marie Light Mettus
    • James A. BaumAmy Jelen GilmerAnne-Marie Light Mettus
    • A61K3800
    • C12R1/075C07K14/325C12N15/8286Y02A40/162
    • Disclosed are novel synthetically-modified B. thuringiensis nucleic acid segments encoding &dgr;-endotoxins having insecticidal activity against lepidopteran insects. Also disclosed are synthetic crystal proteins encoded by these novel nucleic acid sequences. Methods of making and using these genes and proteins are disclosed as well as methods for the recombinant expression, and transformation of suitable host cells. Transformed host cells and transgenic plants expressing the modified endotoxin are also aspects of the invention. Also disclosed are methods for modifying, altering, and mutagenizing specific loop regions between the &agr; helices in domain 1 of these crystal proteins, including Cry1C, to produce genetically-engineered recombinant cry* genes, and the proteins they encode which have improved insecticidal activity. In preferred embodiments, novel Cry1C* amino acid segments and the modified cry1C* nucleic acid sequences which encode them are disclosed.
    • 公开了编码对鳞翅目昆虫具有杀虫活性的δ-内毒素的新型合成修饰的苏云金芽孢杆菌核酸片段。 还公开了由这些新型核酸序列编码的合成晶体蛋白质。 公开了制备和使用这些基因和蛋白质的方法以及重组表达和合适宿主细胞转化的方法。 转化的宿主细胞和表达修饰的内毒素的转基因植物也是本发明的方面。 还公开了用于修饰,改变和诱变这些晶体蛋白(包括Cry1C)的结构域1中的α螺旋之间的特异性环区的方法,以产生遗传工程改造的重组cry *基因及其编码的具有改善的杀虫活性的蛋白质。 在优选的实施方案中,公开了新的Cry1C *氨基酸片段和编码它们的经修饰的cry1C *核酸序列。