Hydrogenophilus hirschii sp. nov., a novel thermophilic hydrogen-oxidizing beta-proteobacterium isolated from Yellowstone National Park

International Journal of Systematic and Evolutionary Microbiology
R StohrM Thomm

Abstract

A novel thermophilic hydrogen-oxidizing bacterium, Hydrogenophilus hirschii Yel5aT (= DSM 11420T = JCM 10831T) has been isolated from the Angel Terrace Spring, Yellowstone National Park. The isolate was rod-shaped (1.0-1.5 x 0.8 microm) with a polarly inserted flagellum. Cells grew chemolithoautotrophically under an atmosphere of H2 and CO2 (80:20) in the presence of low concentrations of O2 (optimum 2.5%). Organotrophic growth occurred on complex organic substrates such as yeast extract and peptone and on organic acids. Carbohydrates and amino acids were not utilized. The strain grew between 50 and 67 degrees C; optimal growth occurred at a temperature of 63 degrees C. The pH optimum was 6.5. NaCl inhibited growth at concentrations higher than 1.5%. The major respiratory lipoquinone was ubiquinone-8. Analysis of fatty acids of Yel5aT revealed a straight-chain saturated C16:0 as the major component followed by cyclo C17:0 and cyclo C19:0. The G+C content of total DNA was 61 mol%. Phylogenetic analysis placed the strain in the beta-proteobacteria. The 16S rDNA sequence of strain Yel5aT was related to that of Hydrogenophilus thermoluteolus. To our knowledge, Hydrogenophilus hirschii is the most thermophilic micro-organism found w...Continue Reading

Citations

Mar 17, 2010·International Journal of Systematic and Evolutionary Microbiology·Hildur VésteinsdóttirJóhann Orlygsson
Aug 11, 2015·Frontiers in Microbiology·Pauliina RajalaMalin Bomberg
Apr 1, 2009·Extremophiles : Life Under Extreme Conditions·Kristina BebloPetra Rettberg
Oct 22, 2014·The ISME Journal·Stéphane ChaillouMarie-Christine Champomier-Vergès
Sep 22, 2009·Canadian Journal of Microbiology·Véronique PrinceCarole Beaulieu
Jan 18, 2005·International Journal of Systematic and Evolutionary Microbiology·Hisako HirayamaKoki Horikoshi
Sep 18, 2003·International Journal of Systematic and Evolutionary Microbiology·Célia M ManaiaBalbina Nogales
Sep 18, 2003·International Journal of Systematic and Evolutionary Microbiology·Célia M ManaiaOlga C Nunes
Jan 30, 2020·Current Microbiology·Maurício Garcia, Luciano Procópio
Sep 27, 2019·Extremophiles : Life Under Extreme Conditions·Carolina Rubiano-LabradorSandra Baena
Jul 15, 2021·Current Microbiology·Supun N SamarasingheDhammika N Magana-Arachchi

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