Comparative and Functional Genomics of Anoxygenic Green Bacteria from the Taxa Chlorobi, Chloroflexi, and Acidobacteria
Comparative and Functional Genomics of Anoxygenic Green Bacteria from the Taxa Chlorobi, Chloroflexi, and Acidobacteria
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DOI：
10.1007/978-94-007-1533-2_3
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发表时间：
2012-01-01
期刊：
影响因子：
--
通讯作者：
Overmann, Joerg
中科院分区：
文献类型：
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作者：
Bryant, Donald A.;Liu, Zhenfeng;Overmann, Joerg
绿色细菌是一组不同的光合细菌，属于细菌领域内的三个主要类群：绿杆菌、绿杆菌和酸杆菌。大多数，虽然不是全部，这些生物体合成细菌叶绿素c，d或e，并利用叶绿体光收获。自从完成了绿色硫细菌Chlorobaculum tepidum和丝状厌氧光养菌Chloroflexus aurantiacus的基因组测序以来，关于这些细菌的代谢和生理学的发现的步伐迅速加快。本章总结了这三个类群的成员从广泛的基因组序列数据中获得的见解。发现的第一chlorophotototrophic成员的门的酸细菌，嗜热Chloracidobacteriumthermophilum，也描述了，最近的见解，这种独特的，有氧光合异养的生理和代谢。基于系统发育的推断来自（细菌）叶绿素生物合成的反应中心和酶的序列分析，光合作用的进化起源的一些影响进行了讨论。
Green bacteria are a diverse group of chlorophototrophic organisms belonging to three major taxa within the domain Bacteria: Chlorobi, Chloroflexi, and Acidobacteria. Most, although not all, of these organisms synthesize bacteriochlorophylls c, d or e and utilize chlorosomes for light harvesting. The pace of discoveries concerning the metabolism and physiology of these bacteria has accelerated rapidly since completion of the sequencing of the genomes of the green sulfur bacterium Chlorobaculum tepidum and the filamentous anoxygenic phototroph, Chloroflexus aurantiacus. This chapter summarizes insights gained from the extensive genome sequence data for members of these three taxa. The discovery of the first chlorophototrophic member of the phylum Acidobacteria, Candidatus Chloracidobacterium thermophilum, is also described, and recent insights into the physiology and metabolism of this unique, aerobic photoheterotroph are presented. Based upon phylogenetic inferences derived from analyses of sequences for reaction centers and enzymes of (bacterio)chlorophyll biosynthesis, some implications concerning the evolutionary origins of photosynthesis are discussed.