Methanocorpusculaceae fam. nov., represented by Methanocorpusculum parvum,Methanocorpusculum sinense spec. nov. and Methanocorpusculum bavaricum spec. nov. |
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Authors: | G Zellner E Stackebrandt P Messner B J Tindall E Conway de Macario H Kneifel U B Sleytr J Winter |
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Institution: | 1. Institut für Mikrobiologie, Universit?t Regensburg, Universit?tsstrasse 31, D-8400, Regensburg, Germany 2. Institut für Allgemeine Mikrobiologie, Christian-Albrechts-Universit?t, Olshausenstrasse 40, D-2300, Kiel, Germany 3. Zentrum für Ultrastrukturforschung, Universit?t für Bodenkultur, Gregor-Mendel-Strasse 33, A-1180, Vienna, Austria 4. Institut für Mikrobiologie, Rheinische Friedrich-Wilhelms-Universit?t, Meckenheimer Allee 168, D-5300, Bonn, Germany 6. Wadsworth Center for Laboratories and Research, New York State Department of Health, 12201, Albany, NY, USA 7. Institut für Biotechnologie, Institut 3, Kernforschungsanlage Jülich GmbH, D-5170, Jülich, Germany
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Abstract: | Two new methanogenic bacteria, Methanocorpusculum sinense spec. nov. strain DSM 4274 from a pilot plant for treatment of distillery wastewater in Chengdu (Province Sichuan, China),
and Methanocorpusculum bavaricum spec. nov. strain DSM 4179, from a wastewater pond of the sugar factory in Regensburg (Bavaria, FRG) are described. Methanocorpusculum strains are weakly motile and form irregularly coccoid cells, about 1 μm in diameter. The cell envelope consists of a cytoplasmic
membrane and a S-layer, composed of hexagonally arranged glycoprotein subunits with molecular weights of 90000 (Methanocorpusculum parvum), 92000 (M. sinense), and 94000 (M. bavaricum). The center-to-center spacings are 14.3 nm, 15.8 nm and 16.0 nm, respectively. Optimal growth of strains is obtained in
the mesophilic temperature range and at a pH around 7. Methane is produced from H2/CO2, formate, 2-propanol/CO2 and 2-butanol/CO2 by M. parvum and M. bavaricum, whereas M. sinense can only utilize H2/CO2 and formate. Growth of M. sinense and M. bavaricum is dependent on the presence of clarified rumen fluid. The G+C content of the DNA of the three strains is ranging from 47.7–53.6
mol% as determined by different methods. A similar, but distinct polar lipid pattern indicates a close relationship between
the three Methanocorpusculum species. The polyamine patterns of M. parvum, M. sinense and M. bavaricum are similar, but distinct from those of other methanogens and are characterized by a high concentration of the otherwise
rare 1,3-diaminopropane. Quantitative comparison of the antigenic fingerprint of members of Methanocorpusculum revealed no antigenic relationship with any one of the reference methanogens tested. On the basis of the distant phylogenetic
position of M. parvum and the data presented in this paper a new family, the Methanocorpusculaceae fam. nov., is defined. |
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Keywords: | Archaebacteria Methanocorpusculaceae Methanocorpusculum sinense spec nov Methanocorpusculum bavaricum spec nov Methanocorpusculum parvum 16 S rRNA Secondary alcohols Lipids Polyamines S-layer Glycoproteins Physiology |
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