Shiota N, Nagasawa A, Sakaki T, Yabusaki Y, Ohkawa H
Graduate School of Science and Technology, Kobe University, Japan.
Plant Physiol. 1994 Sep;106(1):17-23. doi: 10.1104/pp.106.1.17.
Transgenic tobacco (Nicotiana tabacum cv Xanthi) plants expressing a genetically engineered fused enzyme between rat cytochrome P4501A1 (CYP1A1) and yeast NADPH-cytochrome P450 oxidoreductase were produced. The expression plasmid pGFC2 for the fused enzyme was constructed by insertion of the corresponding cDNA into the expression vector pNG01 under the control of the cauliflower mosaic virus 35S promoter and nopaline synthase gene terminator. The fused enzyme cDNA was integrated into tobacco genomes by Agrobacterium infection techniques. In transgenic tobacco plants, the fused enzyme protein was localized primarily in the microsomal fraction. The microsomal monooxygenase activities were approximately 10 times higher toward both 7-ethoxycoumarin and benzo[a]pyrene than in the control plant. The transgenic plants also showed resistance to the herbicide chlortoluron.
培育出了表达大鼠细胞色素P4501A1(CYP1A1)与酵母NADPH - 细胞色素P450氧化还原酶之间基因工程融合酶的转基因烟草(烟草品种Xanthi)植株。通过将相应的cDNA插入到花椰菜花叶病毒35S启动子和胭脂碱合酶基因终止子控制下的表达载体pNG01中,构建了融合酶的表达质粒pGFC2。利用农杆菌感染技术将融合酶cDNA整合到烟草基因组中。在转基因烟草植株中,融合酶蛋白主要定位于微粒体部分。微粒体单加氧酶对7 - 乙氧基香豆素和苯并[a]芘的活性比对照植株高约10倍。转基因植株对除草剂绿麦隆也表现出抗性。