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Título

Thermococcus waiotapuensis sp. nov., an extremely thermophilic archaeon isolated from a freshwater hot spring

AutorGonzález Grau, Juan Miguel ; Sheckells, Dan; Viebahn, Mareike; Krupatkina, D.; Borges, Kimberly M.; Robb, F. T.
Palabras claveThermococcales
Thermococcus waiotapuensis
Extreme thermophile
Archaea
Minimal medium
Sulfur requirement
Fecha de publicación1999
EditorSpringer
CitaciónArchives of Microbiology 172(2): 95–101 (1999)
ResumenAn extremely thermophilic, sulfur-dependent archaeon, strain WT1, was isolated from a freshwater hot spring in the Lake Taupo area of North Island, New Zealand. The cells are flagellated, strictly anaerobic cocci that grow optimally at 85 °C and 5.4 g NaCl l–1. The strain grows heterotrophically on complex proteinaceous substrates or on appropriate salts plus amino acid mixtures and is also able to utilize maltose, starch, and pyruvate. Elemental sulfur could be replaced by cystine or thioglycollate. The range of temperatures allowing growth is from 60 to 90 °C; the pH supporting growth ranges from 5 to 8 (optimum, pH 7). Strain WT1 grew in a defined medium containing amino acids as the sole carbon and energy sources. The required amino acids were: Arg, His, Ile, Leu, Phe, Ser, Thr, Trp, Tyr, and Val. Strain WT1 showed sensitivity to rifampicin. DNA G+C content was 50.4 mol%. Phylogenetic analysis of the sequence encoding the 16S rRNA gene indicated that this isolate is a member of the Thermococcales. DNA/DNA hybridization studies revealed no similarity to several species of Thermococcus and Pyrococcus, with the exception of Thermococcus zilligii. Based on the reported results, we propose strain WT1 as a new species to be named Thermococcus waiotapuensis sp. nov.
Descripción7 página.-- 3 figuras.-- 1 tablas.-- 33 referencias.-- El autor González Grau, Juan Miguel pertenece actualmente al Instituto de Recursos Naturales y Agrobiología de Sevilla-CSIC
Versión del editorhttps://doi.org/10.1007/s002030050745
URIhttp://hdl.handle.net/10261/159620
DOI10.1007/s002030050745
ISSN0302-8933
E-ISSN1432-072X
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