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Applied and Environmental Microbiology, October 1998, p. 3576-3583, Vol. 64, No. 10
0099-2240/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.

Thermocrinis ruber gen. nov., sp. nov., a Pink-Filament-Forming Hyperthermophilic Bacterium Isolated from Yellowstone National Park

Robert Huber,1,* Wolfgang Eder,1 Stefan Heldwein,1 Gerhard Wanner,2 Harald Huber,1 Reinhard Rachel,1 and Karl O. Stetter1

Lehrstuhl für Mikrobiologie and Archaeenzentrum, Universität Regensburg, D-93053 Regensburg,1 and Botanisches Institut, Universität München, D-80638 Munich,2 Germany

Received 4 May 1998/Accepted 23 July 1998

A novel hyperthermophilic bacterium was isolated from pink filamentous streamers (pink filaments) occurring in the upper outflow channel (temperature, 82 to 88°C) of Octopus Spring in Yellowstone National Park, Wyo. The gram-negative cells grew at low salinity at temperatures up to 89°C in the neutral to alkaline pH range. Depending on the culture conditions, the organisms occurred as single motile rods, as aggregates, or as long filaments that formed streamer-like cell masses. The novel isolate grew chemolithoautotrophically with hydrogen, thiosulfate, and elemental sulfur as electron donors and oxygen as the electron acceptor. Alternatively, under aerobic conditions, formate and formamide served as sole energy and carbon sources. The novel isolate had a 16S rRNA sequence closely related to the 16S rRNA sequence obtained from uncultivated pink filaments. It represents a new genus in the order Aquificales, the type species of which we name Thermocrinis ruber (type strain, OC 1/4 [= DSM 12173]).

* Corresponding author. Mailing address: Lehrstuhl für Mikrobiologie, Universität Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany. Phone: 0941/943-3182. Fax: 0941/943-2403. E-mail: Robert.Huber{at}Biologie.Uni-Regensburg.de.

Applied and Environmental Microbiology, October 1998, p. 3576-3583, Vol. 64, No. 10
0099-2240/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.


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