Photosynthetic activity and components of the electron transport chain in the aerobic bacteriochlorophyll a-containing bacterium Roseinatronobacter thiooxidans

Stadnichuk, Igor N.; Yanyushin, Mikhail F.; Boychenko, V. A.; Lukashev, E. P.; Boldareva, E. N.; Solovyev, A. A.; Горленко, В. М.

doi:10.1134/s0026261709010020

Cited by 3 publications

(1 citation statement)

References 21 publications

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“…In contrast, the closely related aerobic anoxygenic phototrophic (AAP) bacterium Roseinatronobacter (Rna.) thiooxidans , isolated from a soda lake in the Kunkurskaya steppe (Chita region, south-easter Siberia) grows solely under aerobic conditions ( Sorokin et al 2000b ; Stadnichuk et al 2009 ). Later, a very similar species, Rna.…”

Section: Introductionmentioning

confidence: 99%

Genomic Analysis of the Evolution of Phototrophy among Haloalkaliphilic Rhodobacterales

Kopejtka

Tomasch

Zeng³

et al. 2017

Genome Biology and Evolution

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A 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.

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Section: Introductionmentioning

confidence: 99%

Genomic Analysis of the Evolution of Phototrophy among Haloalkaliphilic Rhodobacterales

Kopejtka

Tomasch

Zeng³

et al. 2017

Genome Biology and Evolution

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Phylogenetic diversity of bacterial and archaeal communities inhabiting the saline Lake Red located in Sovata, Romania

et al. 2012

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Lake Red is one of the saline lakes which were formed as a consequence of salt massif dissolution at the foot of the Gurghiu Mountains (Central Romania) at the end of the nineteenth century. The lake water had approximately 15 % w/v salt content. Phylogenetic diversity of prokaryotes inhabiting the water and sediment of the lake was studied using cultivation and cultivation-independent methods following a sampling in spring 2009. According to the results of 16S rRNA gene-based denaturing gradient gel electrophoresis (DGGE), the richness of Bacteria was higher than Archaea on the basis of the number and position of dominant bands in the gel. Sequences from DGGE bands were affiliated with Gammaproteobacteria (Halomonas and Alkalilimnicola) and Bacteroidetes (Psychroflexus) as well as Euryarchaeota. Cultivation from five different saline media resulted in 101 bacterial strains of which Gammaproteobacteria (Halomonas, Marinobacter and Salinivibrio) were the most abundant. Firmicutes (Bacillus) and Alphaproteobacteria (Aurantimonas and Roseovarius) were also identified among the isolated strains. The 16S rRNA genes from 82 bacterial and 95 archaeal clones were also phylogenetically analyzed. Bacterial clones were related to various genera of Gammaproteobacteria (Alkalilimnicola, Alkalispirillum, Arhodomonas, Halomonas, Saccharospirillum), Bacteroidetes (Gracilimonas, Psychroflexus) and Alphaproteobacteria (Oceanicola, Roseinatronobacter, Roseovarius). All of the archaeal clones sequenced corresponded to a homologous cluster affiliated with Halopelagius.

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Comparative study of metabolism of the purple photosynthetic bacteria grown in the light and in the dark under anaerobic and aerobic conditions

et al. 2013

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Photosynthetic activity and components of the electron transport chain in the aerobic bacteriochlorophyll a-containing bacterium Roseinatronobacter thiooxidans

Cited by 3 publications

References 21 publications

Genomic Analysis of the Evolution of Phototrophy among Haloalkaliphilic Rhodobacterales

Genomic Analysis of the Evolution of Phototrophy among Haloalkaliphilic Rhodobacterales

Phylogenetic diversity of bacterial and archaeal communities inhabiting the saline Lake Red located in Sovata, Romania

Comparative study of metabolism of the purple photosynthetic bacteria grown in the light and in the dark under anaerobic and aerobic conditions

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