Clostridium viride sp. nov., a strictly anaerobic bacterium using 5-aminovalerate as growth substrate,previously assigned to Clostridium aminovalericum |
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Authors: | Buckel Wolfgang Janssen Peter H. Schuhmann Alexandra Eikmanns Ulrich Messner Paul Sleytr Uwe Liesack Werner |
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Affiliation: | 1.Laboratorium für Mikrobiologie, Fachbereich Biologie, Philipps Universit?t, D-35032, Marburg, Germany ;2.Max-Planck-Institut für Terrestrische Mikrobiologie, D-35043, Marburg, Germany ;3.Zentrum für Ultrastrukturforschung, Universit?t für Bodenkultur, A-1180, Wien, Austria ; |
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Abstract: | Strain T2–7, a 5-aminovalerate-fermenting bacterium previously classified as Clostridium aminovalericum, was further characterized, both physiologically and phylogenetically. Comparative sequencing analysis of the almost complete 16S rDNA revealed that strain T2–7 forms a distinct lineage within a phylogenetically coherent cluster of gram-positive bacteria currently assigned to the genus Clostridium. Strain T2–7 grew with 5-aminovalerate, 5-hydroxyvalerate, 4-hydroxybutyrate, vinylacetate, and crotonate, and required yeast extract and l-cysteine for growth. Other substrates were not utilized. The fermentation products, depending on the growth substrate, were ammonia, acetate, propionate, butyrate, and valerate. Sulphur was reduced by a mechanism not linked to energy conservation. Other acceptors were not utilized. Cells were gram-positive pointed-ended ovals, motile by means of two subpolar flagella, and possessed a gram-positive cell wall structure with an S-layer of hexagonally arranged subunits of 18.5 nm diameter. The DNA mol% G+C was 41.5. Strain T2–7 (DSM 6836) is proposed as the type strain of a new species, Clostridium viride sp. nov. Dedicated to H. A. Barker on the occasion of his 87th birthday |
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Keywords: | Clostridium viride sp. nov. Clostridium aminovalericum 5-Aminovalerate Sulphur reduction Anacrobic degradation 2,4-Pentadienoyl-CoA reductase 5-Hydroxyvaleryl-CoA dehydratase |
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