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A novel obligately anaerobic, alkalithermophilic, chemo-organotrophic bacterium was isolated from a small and very shallow geothermally heated pool at Pushino (Kamchatka, Far East Russia). The bacterium, designated strain JW/VK-KS5YT, was a Gram staining negative, Gram type positive rod. The cells were sometimes branched, with a tendency to grow in long chains, and were non-sporulating and non-motile. The shortest observed doubling time was 28 min when the novel strain was grown at 54–60 °C in 120 mM sodium carbonate-containing medium at pH25 °C 8.5–9.0. The novel bacterium grew on yeast extract and soytone as sole carbon and energy sources but could also use fumarate, thiosulfate and sulfur as electron acceptors. The DNA G+C content was 32.5 mol%. Based on phylogenetic, DNA–DNA hybridization and phenotypic data, it was concluded that isolate JW/VK-KS5YT (=VKM B-2436T=DSM 18970T) represents the type strain of a novel species, Anaerobranca zavarzinii sp. nov.
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International Journal of Systematic and Evolutionary Microbiology vol. 58 , part 6, pp. 1486 - 1491
Supplementary Table S1. Product profiles for co-substrates and acceptors utilized by strain JW/VK-KS5Y Tin the presence of 0.5% (w/v) YE. [ PDF] 59 KB