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首页> 外文期刊>Protist >Intermediary Metabolism in Protists: A Sequence-based View of Facultative Anaerobic Metabolism in Evolutionarily Diverse Eukaryotes
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Intermediary Metabolism in Protists: A Sequence-based View of Facultative Anaerobic Metabolism in Evolutionarily Diverse Eukaryotes

机译：有机体中的中间代谢：基于序列的进化多样性真核生物兼性厌氧代谢的观点。

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摘要

Protists account for the bulk of eukaryotic diversity. Through studies of gene and especially genome sequences the molecular basis for this diversity can be determined. Evident from genome sequencing are examples of versatile metabolism that go far beyond the canonical pathways described for eukaryotes in textbooks. In the last 2-3 years, genome sequencing and transcript profiling has unveiled several examples of heterotrophic and phototrophic protists that are unexpectedly well-equipped for ATP production using a facultative anaerobic metabolism, including some protists that can (Chlamydomonas reinhardtii) or are predicted (Naegleria gruberi, Acanthamoeba castellanii, Amoebidium parasiticum) to produce H_2 in their metabolism. It is possible that some enzymes of anaerobic metabolism were acquired and distributed among eukaryotes by lateral transfer, but it is also likely that the common ancestor of eukaryotes already had far more metabolic versatility than was widely thought a few years ago. The discussion of core energy metabolism in unicellular eukaryotes is the subject of this review. Since genomic sequencing has so far only touched the surface of protist diversity, it is anticipated that sequences of additional protists may reveal an even wider range of metabolic capabilities, while simultaneously enriching our understanding of the early evolution of eukaryotes.
机译：原生生物占真核生物多样性的大部分。通过研究基因，尤其是基因组序列，可以确定这种多样性的分子基础。来自基因组测序的证据是通用代谢的例子，这些代谢远远超出了教科书中针对真核生物描述的经典途径。在过去的2-3年中，基因组测序和转录谱分析揭示了一些异养和光养生物的例子，这些植物利用兼性厌氧代谢出乎意料地很好地用于ATP的生产，其中包括一些可以（或被预测为衣藻）的生物（ Naegleria gruberi，Acanthamoeba castellanii，Amoebidium parasiticum）在其代谢中产生H_2。有可能通过侧向转移获得了一些无氧代谢酶并在真核生物中分布，但是真核生物的共同祖先已经具有比几年前广泛认为的更多的代谢功能。本文讨论了单细胞真核生物中核心能量代谢的讨论。由于到目前为止，基因组测序仅涉及到原生生物多样性的表面，因此可以预期，其他原生生物的序列可能会揭示更广泛的代谢能力，同时也丰富了我们对真核生物早期进化的理解。

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