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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >The genome of Salinibacter ruber: convergence and gene exchange among hyperhalophilic bacteria and archaea.
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The genome of Salinibacter ruber: convergence and gene exchange among hyperhalophilic bacteria and archaea.

机译：盐红杆菌的基因组：嗜盐细菌和古细菌之间的融合和基因交换。

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摘要

Saturated thalassic brines are among the most physically demanding habitats on Earth: few microbes survive in them. Salinibacter ruber is among these organisms and has been found repeatedly in significant numbers in climax saltern crystallizer communities. The phenotype of this bacterium is remarkably similar to that of the hyperhalophilic Archaea (Haloarchaea). The genome sequence suggests that this resemblance has arisen through convergence at the physiological level (different genes producing similar overall phenotype) and the molecular level (independent mutations yielding similar sequences or structures). Several genes and gene clusters also derive by lateral transfer from (or may have been laterally transferred to) haloarchaea. S. ruber encodes four rhodopsins. One resembles bacterial proteorhodopsins and three are of the haloarchaeal type, previously uncharacterized in a bacterial genome. The impact of these modular adaptive elements on the cell biology and ecology of S. ruber is substantial, affecting salt adaptation, bioenergetics, and photobiology.
机译：饱和的卤代盐水是地球上对身体最苛刻的栖息地之一：几乎没有微生物在其中生存。盐红杆菌是这些生物中的一种，并且在高潮盐析结晶器社区中被大量重复发现。该细菌的表型与高度嗜盐古细菌（Haloarchaea）的表型非常相似。基因组序列表明这种相似性是通过在生理水平（不同的基因产生相似的总体表型）和分子水平（独立的突变产生相似的序列或结构）的融合而产生的。几个基因和基因簇也通过横向转移从（或可能已经横向转移到）卤古菌中获得。 S. ruber编码四种视紫红质。一种类似于细菌蛋白视紫红质，三种类似于卤代古细菌型，以前在细菌基因组中没有特征。这些模块化适应性元素对红宝石酵母的细胞生物学和生态学的影响是巨大的，影响了盐的适应性，生物能学和光生物学。

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