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    • 3. 发明申请
    • PURIFIED PROTEINS, RECOMBINANT DNA SEQUENCES AND PROCESSES FOR CONTROLLING THE RIPENING OF COFFEE PLANTS
    • 纯化蛋白质,重组DNA序列和控制咖啡植物焙烤的方法
    • WO1998006852A1
    • 1998-02-19
    • PCT/US1997014184
    • 1997-08-11
    • UNIVERSITY OF HAWAII
    • UNIVERSITY OF HAWAIISTILES, John, I.MOISYADI, IstefoNEUPANE, Kabi, Raj
    • C12N15/52
    • C12N9/0071C12N9/88C12N15/8249
    • Purified proteins, DNA sequences that code on expression therefore and recombinant DNA molecules, including hosts transformed therewith for transforming coffee plants to suppress the expression of enzymes necessary for ethylene synthesis. The DNA sequences and recombinant DNA molecules are characterized in that they code on expression for the enzymes ACC synthase or ACC oxidase that are elements of the pathway for ethylene biosynthesis in coffee plants. Coffee plants are tansformed with vectors containing ACC synthase and/or with ACC oxidate DNA sequences that code on expression for the respective mRNA that is antisense to the mRNA for ACC synthase and/or ACC oxidase. The resulting antisense mRNA binds to XMI mRNA, thereby inactivating the mRNA encoding one or more enzymes in the pathway for ethylene synthesis. The described DNA sequences can also be used to block synthesis of ACC synthase or ACC oxidate using co-suppression. The result in either event is that the transformed plants are incapable of synthesizing ethylene, though other aspects of their metabolism is not affected.
    • 纯化的蛋白质,因此编码表达的DNA序列和重组DNA分子,包括用其转化的宿主转化咖啡植物以抑制乙烯合成所必需的酶的表达。 DNA序列和重组DNA分子的特征在于它们编码作为咖啡植物中乙烯生物合成途径元素的酶ACC合成酶或ACC氧化酶的表达。 用含有ACC合酶和/或ACC氧化DNA序列的载体对咖啡植物进行改造,其编码与ACC合酶和/或ACC氧化酶的mRNA反义的相应mRNA的表达。 所得的反义mRNA结合XMI mRNA,从而使编码乙烯合成途径中的一种或多种酶的mRNA失活。 所描述的DNA序列也可以用于阻断ACC合成酶或ACC氧化物的合成。 在任一事件中的结果是转化的植物不能合成乙烯,尽管其代谢的其它方面不受影响。