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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >Are histones, tubulin, and actin derived from a common ancestral protein?
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Are histones, tubulin, and actin derived from a common ancestral protein?

机译:组蛋白,微管蛋白和肌动蛋白是否来源于共同的祖先蛋白?

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摘要

Histones and the cytoskeletal components tubulin and actin all act as thermal ratchets, using the energy present in Brownian motion to do work. All three also bind to nucleotides. Here we suggest that histones, tubulin, and actin derive from a common ancestral protein. There is some sequence similarity between histone 2A and the bacterial tubulin homologue FtsZ. Histones and actin also share some sequence similarity in the nucleotides and at phosphate-binding sites. Thus, actin and tubulin may also be related, although this is not obvious from sequence analysis. Indeed, actin and tubulin are closely functionally related and cooperate in many cellular processes. Interestingly, recent advances in nanotechnology suggest that thermal ratchets may be able to impart lifelike properties; thus, the evolution of the ancestral histone, tubulin, and actin thermal ratchet may have been crucial in the development of complexity in living organisms.
机译:组蛋白和细胞骨架成分微管蛋白和肌动蛋白都起着棘轮的作用,利用布朗运动中的能量起作用。这三个也都结合核苷酸。在这里,我们建议组蛋白,微管蛋白和肌动蛋白来源于共同的祖先蛋白。组蛋白2A和细菌微管蛋白同源物FtsZ之间存在一些序列相似性。组蛋白和肌动蛋白在核苷酸和磷酸盐结合位点也具有一些序列相似性。因此,肌动蛋白和微管蛋白也可能相关,尽管从序列分析来看这并不明显。实际上,肌动蛋白和微管蛋白在功能上紧密相关并且在许多细胞过程中协同作用。有趣的是,纳米技术的最新进展表明,热棘轮可能具有栩栩如生的性能。因此,祖先组蛋白,微管蛋白和肌动蛋白热棘轮的进化可能对生物体复杂性的发展至关重要。

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