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首页> 外文期刊>Cell motility and the cytoskeleton >The evolution of the cilium and the eukaryotic cell.
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The evolution of the cilium and the eukaryotic cell.

机译：纤毛和真核细胞的进化。

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摘要

The Cilium, the Nucleus and the Mitochondrion are three important organelles whose evolutionary histories are intimately related to the evolution and origin of the eukaryotic cell. The cilium is involved in motility and sensory transduction. The cilium is only found in the eukaryotic cells. Here we show that eight gene duplications prior to the last common ancestor of all extant eukaryotes account for the expansion of the Heavy Chain Dynein family of motor proteins and the evolution of the complexity of the cilium. The ambiguities in the branching of the phylogenetic tree of the HC-Dyneins were resolved by creating well-defined subtrees and using them to create the full tree. Due to the intimate relationship between the nucleus, the division center, mitosis and the basal body/centriole, the evolution of the cilium can now be related to the evolution of mitosis. In addition, the analysis of the cilium rules out its endosymbiotic origin from a phagocytosis of a bacterium.
机译：Cilium，Nucleus和线粒体是三个重要的细胞器，它们的进化历史与真核细胞的进化和起源密切相关。纤毛参与运动性和感觉传导。纤毛仅在真核细胞中发现。在这里，我们显示在所有现存的真核生物的最后一个共同祖先之前的八个基因重复解释了运动蛋白重链动力蛋白家族的扩展以及纤毛复杂性的进化。通过创建定义明确的子树并使用它们来创建完整树，可以解决HC-Dyneins系统发育树分支中的歧义。由于细胞核，分裂中心，有丝分裂和基底体/中心体之间的密切关系，纤毛的进化现在可以与有丝分裂的进化有关。另外，对纤毛的分析排除了其来自细菌吞噬作用的内共生起源。

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