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    • 5. 发明授权
    • Plant-derived map kinase kinase
    • 植物衍生的地图激酶激酶
    • US06376747B1
    • 2002-04-23
    • US09384162
    • 1999-08-27
    • Ti XingKamal MalikTeresa Martin-HellerBrian L. Miki
    • Ti XingKamal MalikTeresa Martin-HellerBrian L. Miki
    • C12N1509
    • C12N9/1205C12N15/8271C12N15/8281
    • A mitogen-activated protein (MAP) kinase kinase gene, tMEK2, was isolated from tomato cv. Bonny Best. By mutagenesis, a permanently-active variant, tMEK2MUT, was created. Both wild type tMEK2 and mutant tMEK2MUT were driven by a strong constitutive promoter, tCUP&Dgr;, in a tomato protoplast transient expression system. Pathogenesis-related genes, PR1b1 and PR3, and a wound-inducible gene, ER5, were activated by tMEK2MUT expression revealing the convergence of the signal transduction pathways for pathogen attack and mechanical stress at the level of MAPKK. Activation of biotic and abiotic stress response genes downstream of tMEK2 occurred through divergent pathways involving at least two classes of mitogen-activated protein kinase. This study shows that tMEK2 may play an important role in the interaction of signal transduction pathways that mediate responses to both biotic (eg disease) and abiotic (wound responsiveness) stresses.
    • 从番茄cv中分离出丝裂原活化蛋白(MAP)激酶激酶基因tMEK2。 邦尼最好的 通过诱变,创建了永久活跃的变体tMEK2MUT。 野生型tMEK2和突变体tMEK2MUT均在番茄原生质体瞬时表达系统中由强组成型启动子tCUPDELTA驱动。 发病相关基因PR1b1和PR3以及伤口诱导基因ER5被tMEK2MUT表达活化,表明MAPKK水平的病原体攻击和机械应激信号转导通路的收敛。 通过涉及至少两类丝裂原活化蛋白激酶的分歧途径,激活tMEK2下游的生物和非生物胁迫反应基因。 这项研究表明,tMEK2可能在介导生物(如疾病)和非生物(伤口反应))应激反应的信号转导途径的相互作用中起重要作用。