Genomic Analysis of the Evolution of Phototrophy among Haloalkaliphilic Rhodobacterales

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F17%3A43895748" target="_blank" >RIV/60076658:12310/17:43895748 - isvavai.cz</a>

Alternative codes found

RIV/61388971:_____/17:00479403

Result on the web

<a href="https://academic.oup.com/gbe/article/9/7/1950/4048061" target="_blank" >https://academic.oup.com/gbe/article/9/7/1950/4048061</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/gbe/evx141" target="_blank" >10.1093/gbe/evx141</a>

Result language

angličtina

Original language name

Genomic Analysis of the Evolution of Phototrophy among Haloalkaliphilic Rhodobacterales

Original language description

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 bacteriumNatronohydrobacter 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 hemAgene) incorporated into their photosynthesis gene clusters, which seems to be a commonfeature 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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10602 - Biology (theoretical, mathematical, thermal, cryobiology, biological rhythm), Evolutionary biology

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Genome Biology and Evolution

ISSN

1759-6653

e-ISSN

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Volume of the periodical

9

Issue of the periodical within the volume

7

Country of publishing house

GB - UNITED KINGDOM

Number of pages

13

Pages from-to

1950-1962

UT code for WoS article

000410676100010

EID of the result in the Scopus database

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