Elucidation of a mechanism of dehydration or heat stress signal transduction in plants through post-translational regulation of a transcription factor

植物增加对环境胁迫如干旱或热的耐受性以响应这些胁迫刺激。我们分析了转录因子DREB 2A在拟南芥逆境胁迫反应中的翻译后调控机制。我们比较了DREB 2A同源基因在许多植物中的氨基酸序列，并分析了定点突变对DREB 2A转录活性的影响。从这些分析中，显示具有丝氨酸/苏氨酸簇的核心区域对于DREB 2A蛋白的翻译后激活是重要的。

Plants increase tolerance to environmental stresses such as drought or heat in response to these stress stimuli. We analyzed the mechanism for the post-translational regulation of the transcription factor DREB2A in the stress response of Arabidopsis. We compared amino acid sequences among DREB2A orthologs in many plant species and analyzed the effects of site-directed mutagenesis on transcriptional activity of DREB2A. From these analyses, a core region that has a serine/threonine cluster was shown to be important for post-translational activation of the DREB2A protein.