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首页> 外文期刊>Journal of Experimental Botany >Genome-wide phylogenetic and structural analysis reveals the molecular evolution of the ABA receptor gene family
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Genome-wide phylogenetic and structural analysis reveals the molecular evolution of the ABA receptor gene family

机译：基因组系统的系统发育和结构分析显示了ABA受体基因家族的分子演变

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摘要

The plant hormone abscisic acid (ABA) plays a crucial role during the plant life cycle as well as in adaptive responses to environmental stresses. The core regulatory components of ABA signaling in plants are the pyrabactin resistance1/PYR1-like/regulatory component of ABA receptor family (PYLs), which comprise the largest plant hormone receptor family known. They act as negative regulators of members of the protein phosphatase type 2C family. Due to the biological importance of PYLs, many researchers have focused on their genetic redundancy and consequent functional divergence. However, little is understood of their evolution and its impact on the generation of regulatory diversity. In this study, we identify positive selection and functional divergence in PYLs through phylogenetic reconstruction, gene structure and expression pattern analysis, positive selection analysis, functional divergence analysis, and structure comparison. We found the correlation of desensitization of PYLs under specific modifications in the molecular recognition domain with functional diversification. Hence, an interesting antagonistic co-evolutionary mechanism is proposed for the functional diversification of ABA receptor family proteins. We believe a compensatory evolutionary pathway may have occurred.
机译：植物激素脱落酸（ABA）在植物生命周期中发挥至关重要的作用，以及对环境压力的适应性反应。植物中ABA信号传导的核心调节组件是ABA受体家族（Pyls）的丙比肌蛋白抵抗1 / Pyr1样/调节组分，其包含最大的植物激素受体。它们充当蛋白质磷酸酶2C系列成员的负调节剂。由于Pyls的生物重要性，许多研究人员都专注于它们的遗传冗余和随之而来的功能性分歧。然而，很少被理解为他们的演变及其对监管多样性的产生的影响。在这项研究中，我们通过系统发育重建，基因结构和表达模式分析，阳性选择分析，功能性发散分析和结构比较来鉴定Pyls中的阳性选择和功能性分歧。我们发现具有功能多样化的分子识别结构域的特异性修饰下幽门的脱敏化的相关性。因此，提出了一种有趣的拮抗共进机理，用于ABA受体家族蛋白的功能多样化。我们认为可能发生了补偿性进化途径。

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