title: Syntrophaceticus schinkii gen. nov., sp. nov., an anaerobic, syntrophic acetate-oxidizing bacterium isolated from a mesophilic anaerobic filter.
abstract: A mesophilic, syntrophic acetate-oxidizing bacterium, designated strain Sp3(T), was isolated from sludge from a mesophilic methanogenic digestor operating at a high ammonium concentration (6.4 g L(-1) NH(4)(+)-N). The strain showed acetate-oxidizing ability in cocultivation with a hydrogen-consuming methanogen. Comparative 16S rRNA gene sequence analysis confirmed that strain Sp3(T) belonged to the Firmicutes-Clostridia class. The most closely related species was Thermacetogenium phaeum (16S rRNA gene sequence identity 92%). Strain Sp3(T) used ethanol, betaine and lactate as carbon and electron sources and showed growth between 25 and 40 degrees C and pH 6.0 and 8.0. Based on the phylogenetic position and the physiological characteristics of strain Sp3(T), this new syntrophic, acetate-oxidizing bacterium is proposed as the new genus and species Syntrophaceticus schinkii, with Sp3(T) (=JCM 16669(T)) as the type strain. An isolate (strain Esp=JCM 16670) with high 16S rRNA gene sequence identity (99%) to syntrophic acetate-oxidizing Clostridium ultunense was also retrieved from the methanogenic digestor.
authors.affiliation: Department of Microbiology, Uppsala BioCenter, Swedish University of Agricultural Sciences, Uppsala, Sweden.
authors.forename: Maria
authors.initials: M
authors.lastname: Westerholm
authors.forename: Stefan
authors.initials: S
authors.lastname: Roos
authors.forename: Anna
authors.initials: A
authors.lastname: Schnürer
mesh_terms: D000085:Acetates / Q000378:metabolism*; D000693:Anaerobiosis; D019149:Bioreactors / Q000382:microbiology; D004269:DNA, Bacterial / Q000235:genetics; D004275:DNA, Ribosomal / Q000235:genetics; D006094:Gram-Positive Bacteria / Q000145:classification / Q000235:genetics / Q000302:isolation & purification* / Q000378:metabolism*; D008969:Molecular Sequence Data; D010084:Oxidation-Reduction; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012722:Sewage / Q000382:microbiology
chemical_list: D000085:Acetates; D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D012336:RNA, Ribosomal, 16S; D012722:Sewage