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Applied and Environmental Microbiology, January 1999, p. 67-72, Vol. 65, No. 1
0099-2240/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Characterization of a Facultatively Psychrophilic Bacterium, Vibrio rumoiensis sp. nov., That Exhibits High Catalase Activity

Isao Yumoto,1,* Hideaki Iwata,1,2 Tomoo Sawabe,3 Keisuke Ueno,1 Nobutoshi Ichise,1,4 Hidetoshi Matsuyama,2 Hidetoshi Okuyama,1,4 and Kosei Kawasaki1

Bioscience and Chemistry Division, Hokkaido National Industrial Research Institute, Tsukisamu-Higashi, Toyohira-ku, Sapporo 062-8517,1 Department of Bioscience and Technology, School of Engineering, Hokkaido Tokai University, Minaminosawa, Minami-ku, Sapporo 005-8601,2 Department of Fisheries, Oceanography & Marine Science, Faculty of Fisheries, Hokkaido University, Hakodate 041-0821,3 Laboratory of Environmental Molecular Biology, Graduate School of Environmental Earth Science, Hokkaido University, Sapporo 060-0810,4 Japan

Received 2 July 1998/Accepted 19 October 1998

A novel facultatively psychrophilic bacterium, strain S-1, which exhibits extraordinarily high catalase activity was isolated from the drain pool of a fish product processing plant that uses H2O2 as a bleaching and microbicidal agent. The catalase activity of the isolate was 1 or 2 orders of magnitude higher than those of Corynebacterium glutamicum, Staphylococcus aureus, Pseudomonas fluorescens, and five other species tested in this study. The strain seemed to possess only one kind of catalase, according to the results of polyacrylamide gel electrophoresis of the cell extract. The optimum temperature for catalase activity was about 30°C, which was about 20°C lower than that for bovine catalase activity. Electron microscopic observation revealed that the surface of the microorganism was covered by blebs. Although the isolate was nonflagellated, its taxonomic position on the basis of physiological and biochemical characteristics and analysis of 16S rRNA sequence and DNA-DNA relatedness data indicated that strain S-1 is a new species belonging to the genus Vibrio. Accordingly, we propose the name Vibrio rumoiensis. The type strain is S-1 (FERM P-14531).

* Corresponding author. Mailing address: Hokkaido National Industrial Research Institute, 2-17-2-1 Tsukisamu-Higashi, Toyohira-ku, Sapporo 062-8517, Japan. Phone: 81-11-857-8925. Fax: 81-11-857-8900. E-mail: yumoto{at}hniri.go.jp.

Applied and Environmental Microbiology, January 1999, p. 67-72, Vol. 65, No. 1
0099-2240/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.


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