Chloracidobacterium

In taxonomy, Chloracidobacterium is a genus of the Acidobacteria.[1]

Chloracidobacterium
Scientific classification
Kingdom:
Bacteria
Phylum:
Acidobacteria
Class:
Acidobacteria
Order:
Acidobacteriales
Family:
Acidobacteriaceae
Genus:
Chloracidobacterium

This is a group of photosynthetic bacteria were discovered in 2007 and their identification extends the number of bacterial phyla that can carry out chlorophyll-based photosynthesis from five to six.[2][3]

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.[4] It was later isolated after the inhibition of Synechococcus sp. in the microbial mats samples, leading to a co-culture C. thermophilum, Anoxybacillus sp. 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 sp. and Anoxybacillus sp. 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.[4]

References
  1. See the NCBI webpage on Chloracidobacterium. Data extracted from the "NCBI taxonomy resources". National Center for Biotechnology Information. Retrieved 2007-03-19.
  2. Bryant DA, Costas AM, Maresca JA, Chew AG, Klatt CG, Bateson MM, et al. (July 2007). "Candidatus Chloracidobacterium thermophilum: an aerobic phototrophic Acidobacterium". Science. 317 (5837): 523–6. Bibcode:2007Sci...317..523B. doi:10.1126/science.1143236. PMID 17656724.
  3. Raymond J (February 2008). "Coloring in the tree of life". Trends in Microbiology. 16 (2): 41–3. doi:10.1016/j.tim.2007.11.003. PMID 18182293.
  4. Tank M, Bryant DA (2015-03-27). "Nutrient requirements and growth physiology of the photoheterotrophic Acidobacterium, Chloracidobacterium thermophilum". Frontiers in Microbiology. 6: 226. doi:10.3389/fmicb.2015.00226. PMC 4376005. PMID 25870589.
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