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Arsenic(III) Fuels Anoxygenic Photosynthesis in Hot Spring Biofilms from Mono Lake, California
TLDR
Phylogenetic analysis indicates that microbial arsenic metabolism is ancient and probably extends back to the primordial Earth, and production of As(V) by anoxygenic photosynthesis probably opened niches forPrimordial Earth's first As( V)-respiring prokaryotes.
Acrylyl-Coenzyme A Reductase, an Enzyme Involved in the Assimilation of 3-Hydroxypropionate by Rhodobacter sphaeroides
TLDR
In this work, in vitro enzyme activity of purified, recombinant AcuI is characterized using a coupled spectrophotometric assay and it is speculated that acuI encoded acrylyl-CoA reductase.
Cold-active halophilic bacteria from the ice-sealed Lake Vida, Antarctica
TLDR
This is the first report of pure cultures of bacteria from Lake Vida, and the isolates displayed a phenotype consistent with life in a cold hypersaline environment.
Energy Conservation in Heliobacteria: Photosynthesis and Central Carbon Metabolism
TLDR
This chapter summarizes the current understanding of energy conservation in heliobacteria as it relates to central carbon metabolism, electron transport, and light harvesting and photochemistry within the reaction center.
Taxonomy, phylogeny, and ecology of the heliobacteria
TLDR
The genome sequence of the thermophile Heliobacterium modesticaldum supports the hypothesis that heliobacteria are “minimalist phototrophs” and that they may have played a key role in the evolution of phototrophic bacteria.
Diversity of extremophilic purple phototrophic bacteria in Soap Lake, a Central Washington (USA) Soda Lake.
TLDR
It is shown that a significant diversity of purple bacteria inhabit this soda lake, and it is possible that Soap Lake purple bacteria are major contributors of organic matter into the ecosystem of this lake, especially in its extensive anoxic and sulfidic deep waters.
Rhodobacter sphaeroides Uses a Reductive Route via Propionyl Coenzyme A To Assimilate 3-Hydroxypropionate
TLDR
It is established that acetyl-CoA is not the exclusive entry point for 3-Hydroxypropionate into the central carbon metabolism and that the reductive conversion of 3-hydroxyPropionate to propionyl- coenzyme A is a necessary route for the assimilation of this molecule by R. sphaeroides.
Genome Sequence of Rhodoferax antarcticus ANT.BRT; A Psychrophilic Purple Nonsulfur Bacterium from an Antarctic Microbial Mat
TLDR
This report represents the first genomic analysis of a psychrophilic anoxygenic phototroph and provides a glimpse of the genetic basis for maintaining a phototrophic lifestyle in a permanently cold, yet highly variable, environment.
Thiocapsa imhoffii, sp. nov., an alkaliphilic purple sulfur bacterium of the family Chromatiaceae from Soap Lake, Washington (USA)
TLDR
The unique assemblage of physiological and phylogenetic properties of strain SC5 defines it as a new species of the genus Thiocapsa, and it is described herein as Tca.
Response to Comment on "Arsenic(III) Fuels Anoxygenic Photosynthesis in Hot Spring Biofilms from Mono Lake, California"
TLDR
A conceptual debate is brought to the question of which came first in the course of planetary biological evolution, arsenite [As(III)] oxidation or dissimilatory arsenate [AsV] reduction, but the authors disagree with their reasoning and stand by their original conclusion.
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