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1Laboratory of Marine Microbiology, Department of Applied Bioscience, Graduate School of Agriculture, Kyoto University, Kyoto 606-01, Japan
2Department of Chemistry, School of Medicine, University of Occupational and Environmental Health, Kitakyushu 807, Japan
3Marine Biotechnology Institute, Shimizu Laboratories, Shimizu, Shizuoka 424, Japan
* Corresponding author. Phone: 81-75-753-6218. Fax: 81-75-753-6226. Electronic mail address: mmb{at}kais.kyoto-u.ac.jp.
ABSTRACT
A novel aerobic hyperthermophilic archaeon was isolated from a coastal solfataric vent at Kodakara-Jima Island, Japan. The new isolate, strain K1, is the first strictly aerobic organism growing at temperatures up to 100°C. It grows optimally at 90 to 95°C, pH 7.0, and a salinity of 3.5%. The cells are spherical shaped and 0.8 to 1.2 µm in diameter. Various proteinaceous complex compounds served as substrates during aerobic growth. Thiosulfate stimulates growth without producing H2S. The core lipids consist solely of C25-isopranyl archaeol(glycerol diether). The G+C content of the genomic DNA is 67 mol%. Phylogenetic analysis based on 16S rRNA sequence indicates that strain K1 is a new member of Crenarchaeota. On the basis of our results, the name Aeropyrum pernix gen. nov., sp. nov. is proposed (type strain: K1; JCM 9820).
Present address: Biotechnology Research Department, Taisei Corporation, Narashino, Chiba 275, Japan. This article has been cited by other articles:
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