Think pink: photosynthesis, plasmids and the <i>Roseobacter</i> clade

Petersen, Jörn; Brinkmann, Henner; Bunk, Boyke; Michael, Victoria; Päuker, Orsola; Pradella, Silke

doi:10.1111/j.1462-2920.2012.02806.x

Cited by 54 publications

(66 citation statements)

References 48 publications

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“…The question remains as to a suitable vector capable of distant interspecies transfer of a large-sized PGC. A complete PGC has been reported in a promiscuous self-transmissible R-prime plasmid of R. capsulatus (39) and in two plasmids of Roseobacter litoralis and Sulfitobacter guttiformis (40). Photosynthesis genes also can be packed into gene transfer agents (41,42) or bacteriophages (43)(44)(45).…”

Section: Phylogeny Of Photosynthesis Genes In Gemmatimonadetes Andmentioning

confidence: 99%

Functional type 2 photosynthetic reaction centers found in the rare bacterial phylum Gemmatimonadetes

Zeng

Feng

Medová

et al. 2014

Proc. Natl. Acad. Sci. U.S.A.

222

253

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Photosynthetic bacteria emerged on Earth more than 3 Gyr ago. To date, despite a long evolutionary history, species containing (bacterio)chlorophyll-based reaction centers have been reported in only 6 out of more than 30 formally described bacterial phyla: Cyanobacteria, Proteobacteria, Chlorobi, Chloroflexi, Firmicutes, and Acidobacteria. Here we describe a bacteriochlorophyll a-producing isolate AP64 that belongs to the poorly characterized phylum Gemmatimonadetes. This red-pigmented semiaerobic strain was isolated from a freshwater lake in the western Gobi Desert. It contains fully functional type 2 (pheophytin-quinone) photosynthetic reaction centers but does not assimilate inorganic carbon, suggesting that it performs a photoheterotrophic lifestyle. Full genome sequencing revealed the presence of a 42.3-kb-long photosynthesis gene cluster (PGC) in its genome. The organization and phylogeny of its photosynthesis genes suggests an ancient acquisition of PGC via horizontal transfer from purple phototrophic bacteria. The data presented here document that Gemmatimonadetes is the seventh bacterial phylum containing (bacterio)chlorophyllbased phototrophic species. To our knowledge, these data provide the first evidence that (bacterio)chlorophyll-based phototrophy can be transferred between distant bacterial phyla, providing new insights into the evolution of bacterial photosynthesis.anoxygenic photosynthesis | horizontal gene transfer | bacterial pigments | aerobic photoheterotroph | fluorescence imaging system

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Section: Phylogeny Of Photosynthesis Genes In Gemmatimonadetes Andmentioning

confidence: 99%

Functional type 2 photosynthetic reaction centers found in the rare bacterial phylum Gemmatimonadetes

Zeng

Feng

Medová

et al. 2014

Proc. Natl. Acad. Sci. U.S.A.

222

253

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“…The taxonomic distribution of these chemolithotrophic gene sets does not map coherently to species phylogeny, suggesting that gain and loss of these traits have occurred multiple times during Roseobacter evolution, consistent with the scenario that roseobacters have continuously explored new ecological habitats. A few of these ecologically relevant genetic traits, including complete photosynthetic gene clusters (58), capabilities for production of the antibiotic tropodithietic acid (TDA) (59,60), and type IV secretion systems (61), are found on plasmids, suggesting that extrachromosomal DNA could be an important mechanism by which genes useful for environmental adaptation are transferred among roseobacters.…”

Section: Genome Contentmentioning

confidence: 99%

Evolutionary Ecology of the Marine Roseobacter Clade

Luo

Moran

2014

Microbiol Mol Biol Rev

287

244

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SUMMARY Members of the Roseobacter clade are equipped with a tremendous diversity of metabolic capabilities, which in part explains their success in so many different marine habitats. Ideas on how this diversity evolved and is maintained are reviewed, focusing on recent evolutionary studies exploring the timing and mechanisms of Roseobacter ecological diversification.

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“…Some of the consequences of genome reduction involving significant decreases in metabolic capabilities are indicated by the following three examples, two from oxygenic photolithotrophs and one from osmochemoorganotrophs. (i) Many Prochlorococcus genotypes cannot use NO 3 2 as a N-source and some cannot use NO 2…”

Section: Introductionmentioning

confidence: 99%

Interactions of photosynthesis with genome size and function

Raven

Beardall

Larkum

et al. 2013

Phil. Trans. R. Soc. B

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Photolithotrophs are divided between those that use water as their electron donor (Cyanobacteria and the photosynthetic eukaryotes) and those that use a different electron donor (the anoxygenic photolithotrophs, all of them Bacteria). Photolithotrophs with the most reduced genomes have more genes than do the corresponding chemoorganotrophs, and the fastest-growing photolithotrophs have significantly lower specific growth rates than the fastest-growing chemoorganotrophs. Slower growth results from diversion of resources into the photosynthetic apparatus, which accounts for about half of the cell protein. There are inherent dangers in (especially oxygenic) photosynthesis, including the formation of reactive oxygen species (ROS) and blue light sensitivity of the water spitting apparatus. The extent to which photolithotrophs incur greater DNA damage and repair, and faster protein turnover with increased rRNA requirement, needs further investigation. A related source of environmental damage is ultraviolet B (UVB) radiation (280–320 nm), whose flux at the Earth's surface decreased as oxygen (and ozone) increased in the atmosphere. This oxygenation led to the requirements of defence against ROS, and decreasing availability to organisms of combined (non-dinitrogen) nitrogen and ferrous iron, and (indirectly) phosphorus, in the oxygenated biosphere. Differential codon usage in the genome and, especially, the proteome can lead to economies in the use of potentially growth-limiting elements

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Think pink: photosynthesis, plasmids and the Roseobacter clade

Cited by 54 publications

References 48 publications

Functional type 2 photosynthetic reaction centers found in the rare bacterial phylum Gemmatimonadetes

Functional type 2 photosynthetic reaction centers found in the rare bacterial phylum Gemmatimonadetes

Evolutionary Ecology of the Marine Roseobacter Clade

Interactions of photosynthesis with genome size and function

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