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Candidatus Chloracidobacterium thermophilum: An Aerobic Phototrophic Acidobacterium

Science  27 Jul 2007:
Vol. 317, Issue 5837, pp. 523-526
DOI: 10.1126/science.1143236

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Abstract

Only five bacterial phyla with members capable of chlorophyll (Chl)–based phototrophy are presently known. Metagenomic data from the phototrophic microbial mats of alkaline siliceous hot springs in Yellowstone National Park revealed the existence of a distinctive bacteriochlorophyll (BChl)–synthesizing, phototrophic bacterium. A highly enriched culture of this bacterium grew photoheterotrophically, synthesized BChls a and c under oxic conditions, and had chlorosomes and type 1 reaction centers. “Candidatus Chloracidobacterium thermophilum” is a BChl-producing member of the poorly characterized phylum Acidobacteria.

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