Genomic Analysis of the Evolution of Phototrophy among Haloalkaliphilic Rhodobacterales.
Cast your vote
You can rate an item by clicking the amount of stars they wish to award to this item.
When enough users have cast their vote on this item, the average rating will also be shown.
Your vote was cast
Thank you for your feedback
Thank you for your feedback
MetadataShow full item record
AbstractA characteristic feature of the order Rhodobacterales is the presence of a large number of photoautotrophic and photoheterotrophic species containing bacteriochlorophyll. Interestingly, these phototrophic species are phylogenetically mixed with chemotrophs. To better understand the origin of such variability, we sequenced the genomes of three closely related haloalkaliphilic species, differing in their phototrophic capacity and oxygen preference: the photoheterotrophic and facultatively anaerobic bacterium Rhodobaca barguzinensis, aerobic photoheterotroph Roseinatronobacter thiooxidans, and aerobic heterotrophic bacterium Natronohydrobacter thiooxidans. These three haloalcaliphilic species are phylogenetically related and share many common characteristics with the Rhodobacter species, forming together the Rhodobacter-Rhodobaca (RR) group. A comparative genomic analysis showed close homology of photosynthetic proteins and similarity in photosynthesis gene organization among the investigated phototrophic RR species. On the other hand, Rhodobaca barguzinensis and Roseinatronobacter thiooxidans lack an inorganic carbon fixation pathway and outer light-harvesting genes. This documents the reduction of their photosynthetic machinery towards a mostly photoheterotrophic lifestyle. Moreover, both phototrophic species contain 5-aminolevulinate synthase (encoded by the hemA gene) incorporated into their photosynthesis gene clusters, which seems to be a common feature of all aerobic anoxygenic phototrophic Alphaproteobacteria. Interestingly, the chrR-rpoE (sigma24) operon, which is part of singlet oxygen defense in phototrophic species, was found in the heterotrophic strain Natronohydrobacter thiooxidans. This suggests that this organism evolved from a photoheterotrophic ancestor through the loss of its photosynthesis genes. The overall evolution of phototrophy among the haloalkaliphilic members of the RR group is discussed.
CitationGenomic Analysis of the Evolution of Phototrophy among Haloalkaliphilic Rhodobacterales. 2017, 9 (7):1950-1962 Genome Biol Evol
AffiliationHelmholtz Centre for infection research, Inhoffenstr.7,38124 Braunschweig, Germany.
JournalGenome biology and evolution
The following license files are associated with this item:
Except where otherwise noted, this item's license is described as http://creativecommons.org/licenses/by-nc-sa/4.0/
- Emended description of the genus Tabrizicola and the species Tabrizicola aquatica as aerobic anoxygenic phototrophic bacteria.
- Authors: Tarhriz V, Hirose S, Fukushima SI, Hejazi MA, Imhoff JF, Thiel V, Hejazi MS
- Issue date: 2019 Aug
- Horizontal operon transfer, plasmids, and the evolution of photosynthesis in Rhodobacteraceae.
- Authors: Brinkmann H, Göker M, Koblížek M, Wagner-Döbler I, Petersen J
- Issue date: 2018 Aug
- [Comparative study of metabolism of the purple photosynthetic bacteria grown in the light and in the dark under anaerobic and aerobic conditions].
- Authors: Keppen OI, Krasil'nikova EN, Lebedeva NV, Ivanovskiĭ RN
- Issue date: 2013 Sep-Oct
- Complete genome sequence of the filamentous anoxygenic phototrophic bacterium Chloroflexus aurantiacus.
- Authors: Tang KH, Barry K, Chertkov O, Dalin E, Han CS, Hauser LJ, Honchak BM, Karbach LE, Land ML, Lapidus A, Larimer FW, Mikhailova N, Pitluck S, Pierson BK, Blankenship RE
- Issue date: 2011 Jun 29
- Aerobic Anoxygenic Photosynthesis Is Commonly Present within the Genus Limnohabitans.
- Authors: Kasalický V, Zeng Y, Piwosz K, Šimek K, Kratochvilová H, Koblížek M
- Issue date: 2018 Jan 1