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首页> 外文期刊>Journal of bacteriology >Distribution and Phylogeny of Light-Oxygen-Voltage-Blue-Light-Signaling Proteins in the Three Kingdoms of Life
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Distribution and Phylogeny of Light-Oxygen-Voltage-Blue-Light-Signaling Proteins in the Three Kingdoms of Life

机译：生命的三个王国中的光氧电压蓝光信号蛋白的分布和系统发育

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Plants and fungi respond to environmental light stimuli via the action of different photoreceptor modules. One such class, responding to the blue region of light, is constituted by photoreceptors containing so-called light-oxygen-voltage (LOV) domains as sensor modules. Four major LOV families are currently identified in eukaryotes: (i) the plant phototropins, regulating various physiological effects such as phototropism, chloroplast relocation, and stomatal opening; (ii) the aureochromes, mediating photomorphogenesis in photosynthetic stramenopile algae; (iii) the plant circadian photoreceptors of the zeitlupe (ZTL)/adagio (ADO)/flavin-binding Kelch repeat F-box protein 1 (FKF1) family; and (iv) the fungal circadian photoreceptors white-collar 1 (WC-1). Blue-light-sensitive LOV signaling modules are also widespread throughout the prokaryotic world, and physiological responses mediated by bacterial LOV photoreceptors were recently reported. Thus, the question arises as to the evolutionary relationship between the pro- and eukaryotic LOV photoreceptor systems. We used Bayesian and maximum-likelihood tree reconstruction methods to infer evolutionary scenarios that might have led to the widespread appearance of LOV domains among the pro- and eukaryotes. The phylogenetic study presented here suggests a bacterial origin for the LOV domains of the four major eukaryotic LOV photoreceptor families, whereas the LOV sensor domains were most likely recruited from the bacteria in the course of plastid and mitochondrial endosymbiosis.
机译：植物和真菌通过不同的感光模块的作用来响应环境光的刺激。这类对光的蓝色区域作出响应的类别是由含有所谓的 l ight- o xygen- v oltage（ LOV）域作为传感器模块。目前在真核生物中鉴定出四个主要的LOV家族：（i）植物光蛋白，调节各种生理作用，如光致，叶绿体重定位和气孔开放; （ii）在光合作用的层生藻中介导光形态发生的金色素; （iii）zeitlupe（ZTL）/ adagio（ADO）/结合黄素的Kelch重复F-box蛋白1（FKF1）家族的植物昼夜节律受体; （iv）真菌昼夜光感受器白领1（WC-1）。对蓝光敏感的LOV信号模块在整个原核世界中也很普遍，最近还报道了由细菌LOV光感受器介导的生理反应。因此，存在关于原核和真核LOV感光体系统之间的进化关系的问题。我们使用贝叶斯和最大似然树重构方法来推断进化场景，这可能导致原核和真核生物中LOV域的广泛出现。此处提出的系统发育研究表明，四个主要的真核LOV感光体家族的LOV域的细菌起源，而LOV传感器域最有可能在质体和线粒体内共生过程中从细菌中募集。

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