<i>Candidatus</i> Chloracidobacterium thermophilum: An Aerobic Phototrophic Acidobacterium
Donald A. Bryant(University of Southern California), Amaya M. Garcia Costas(University of Southern California), Julia A. Maresca(University of Southern California), Aline Gómez Maqueo Chew(University of Southern California), Christian G. Klatt(University of Southern California), Mary M. Bateson(University of Southern California), Luke J. Tallon(University of Southern California), Jessica B. Hostetler(University of Southern California), William Nelson(University of Southern California), John F. Heidelberg(University of Southern California), David M. Ward(University of Southern California)
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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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