''Chloracidobacterium'' is a genus of the

Acidobacteriota Acidobacteriota is a phylum of Gram-negative bacteria. Its members are physiologically diverse and ubiquitous, especially in soils, but are under-represented in culture. Description Members of this phylum are physiologically diverse, and can be ...

. It is currently assigned to the family

Acidobacteriaceae The Acidobacteriaceae are a family of Acidobacteriota. Phylogeny The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature and National Center for Biotechnology Information. See also * List of bac ...

, but phylogenetic evidence suggests that it belongs in

Blastocatellia The Blastocatellales is an order of Acidobacteriota within the class Blastocatellia. Phylogeny The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature and the phylogeny is based on 16S rRNA 16S rRN ...

. This is a group of

photosynthetic Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's activities. Some of this chemical energy is stored in c ...

bacteria were discovered in 2007 and their identification extends the number of bacterial phyla that can carry out

chlorophyll Chlorophyll (also chlorophyl) is any of several related green pigments found in cyanobacteria and in the chloroplasts of algae and plants. Its name is derived from the Greek words , ("pale green") and , ("leaf"). Chlorophyll allow plants to a ...

-based photosynthesis from five to six.

"''Candidatus'' Chloracidobacterium thermophilum"

The organism "''Candidatus'' Chloracidobacterium thermophilum" was initially detected through the bioinformatics analyses of metagenomic sequence data from the microbial mats collected from a hot spring in Yellowstone National Park. It was later isolated after the inhibition of ''Synechococcus'' species in the microbial mats samples, leading to a co-culture ''C. thermophilum'', ''Anoxybacillus'' species, and ''Meiothermus'' species. ''C. thermophilum'' was plated on Midnight Medium (CTM) media to culture it for pure isolation. Genomic sequencing of the bacterium revealed that it did not contain genes for the enzymes to reduce sulfate, yet it was dependent on a reduced sulfur source. The researchers likely speculated that it shared a mutualistic relationship with the cocultures of ''Meiothermus'' species and ''Anoxybacillus'' species for access to reduced sulfur sources. In addition, the bacterium was determined to be aerophilic, moderately thermophilic, anoxygenic and photoheterotrophic. Ultimately, they found that it is dependent on a reduced sulfur source, bicarbonate, L-lysine, and vitamin B₁₂ for pre culture isolation.

Phylogeny

The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) and National Center for Biotechnology Information (NCBI)

References

Acidobacteriota Bacteria genera Acidophiles {{Acidobacteria-stub