Peptoclostridium Galperin et al. 2016
General information
Description and emendation
Obligately anaerobic, motile, straight or slightly curved rods, 0.5-1.5 × 2-8 µm, metabolizing amino acids and oligopeptides but not carbohydrates. Gram-staining variable, Gram-positive-type cell wall contains meso-diaminopimelate. Cells grow at 15-40°C, no growth at 42°C; pH range is from 6.5 to 8.4, optimum pH is 7.1-7.4, can grow in defined media containing biotin using glycine or serine as sole carbon and energy source. Betaine and sarcosine (N-methylglycine) can be used as carbon and energy sources in the presence of electron donors, such as H2 or amino acids alanine, leucine, isoleucine, valine or phenylalanine. Utilization of glycine is via Stickland reaction catalysed by the glycine reductase complex and requires selenium. Glycine is metabolized to acetate, CO2 and NH3; serine is metabolized to acetate, ethanol, CO2, H2 and NH3. In complex media, acetate and butyrate are the major fermentation products. Growth is stimulated by low amounts of NaCl but completely inhibited by 6% NaCl. Oxidase and catalase negative. Sulfate, thiosulfate and nitrate are not reduced. Cultured representatives of Peptoclostridium have been isolated from anaerobic mud in wastewater and marine sediments. Metagenomics analyses detected 16S rRNA genes from potential members of this genus in microbial consortia performing anaerobic dechlorination of hexachlorobenzene and polychlorinated biphenyls and dibenzofurans, an anaerobic cellulolytic microbial consortium from mangrove soil, as well as in a methanogenic bioreactor degrading terephthalate. The G+C content of genomic DNA ranges from 41.3 to 44.0 mol%.
Subdivision(s)
MID | Name | Rank | Taxon ID |
---|---|---|---|
M021702011309002 | Peptoclostridium acidaminophilum | Species | 1731 |
M021702011309001 | Peptoclostridium litorale | Species | 1557 |