数字农科院2.0

Constitutive expression of a rice GTPase-activating protein induces defense responses

文献类型： 外文期刊

作者： Cheung, Ming-Yan;Zeng, Nai-Yan;Tong, Suk-Wah;Li, Wing-Yen Francisca;Sun, Samuel Sai-Ming;Lam, Hon-Ming;Cheung, Ming-Yan;Tong, Suk-Wah;Li, Wing-Yen Francisca;Xue, Yan;Sun, Samuel Sai-Ming;Lam, Hon-Ming;Zhao, Kai-Jun;Wang, Chunlian;Zhang, Qi;Fu, Yaping;Sun, Zongxiu

作者机构：

关键词： signal transduction

期刊名称： NEW PHYTOLOGIST

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年卷期：

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收录情况： SCI

摘要： G-proteins (guanine nucleotide-binding proteins that usually exhibit GTPase activities) and related signal transduction processes play important roles in mediating plant defense responses; here, a rice (Oryza sativa) cDNA clone, OsGAP1, encoding a GTPase-activating protein (GAP) that also contains a protein kinase C conserved region 2 (C2) domain is reported. An interacting G-protein partner for the OsGAP1 protein was identified by yeast two-hybrid library screening and confirmed by co-immunoprecipitation; the GTPase-activation activity of OsGAP1 on this interacting G-protein was demonstrated using in vitro assays. OsGAP1 was induced by wounding in rice and the presence of the R locus Xa14 enhances such induction. Gain-of-function tests in transgenic rice and Arabidopsis thaliana showed that constitutive expression of OsGAP1 led to increased resistance to bacterial pathogens in both monocots and dicots.

分类号： Q94

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