| ferroglobus placidus gen. nov., sp. nov., a novel hyperthermophilic archaeum that oxidizes fe2+ at neutral ph under anoxic conditions. | a novel coccoid, anaerobic, fe2+-oxidizing archaeum was isolated from a shallow submarine hydrothermal system at vulcano, italy. in addition to ferrous iron, h2 and sulfide served as electron donors. no3- was used as electron acceptor. in the presence of h2, also s2o32- could serve as electron acceptor. the isolate was a neutrophilic hyperthermophile that grew between 65 degrees c and 95 degrees c. it represents a novel genus among the archaeoglobales that we name ferroglobus. the type species i ... | 1996 | 8929276 |
| pathways of autotrophic co2 fixation and of dissimilatory nitrate reduction to n2o in ferroglobus placidus | the strictly anaerobic archaeon ferroglobus placidus was grown chemolithoautotrophically on h2 and nitrate and analyzed for enzymes and coenzymes possibly involved in autotrophic co2 fixation. the following enzymes were found [values in parentheses = μmol min-1 (mg protein)-1]: formylmethanofuran dehydrogenase (0.2), formylmethanofuran:tetrahydromethanopterin formyltransferase (0.6), methenyltetrahydromethanopterin cyclohydrolase (10), f420-dependent methylenetetrahydromethanopterin dehydrogenas ... | 1997 | 9000337 |
| acetate oxidation coupled to fe(iii) reduction in hyperthermophilic microorganisms. | no hyperthermophilic microorganisms have previously been shown to anaerobically oxidize acetate, the key extracellular intermediate in the anaerobic oxidation of organic matter. here we report that two hyperthermophiles, ferroglobus placidus and "geoglobus ahangari," grow at 85 degrees c by oxidizing acetate to carbon dioxide, with fe(iii) serving as the electron acceptor. these results demonstrate that acetate could potentially be metabolized within the hot microbial ecosystems in which hyperth ... | 2001 | 11229932 |
| anaerobic degradation of aromatic compounds coupled to fe(iii) reduction by ferroglobus placidus. | aromatic compounds are an important component of the organic matter in some of the anaerobic environments that hyperthermophilic microorganisms inhabit, but the potential for hyperthermophilic microorganisms to metabolize aromatic compounds has not been described previously. in this study, aromatic metabolism was investigated in the hyperthermophile ferroglobus placidus. f. placidus grew at 85 degrees c in anaerobic medium with a variety of aromatic compounds as the sole electron donor and poorl ... | 2001 | 11359514 |
| genome-scale analysis of anaerobic benzoate and phenol metabolism in the hyperthermophilic archaeon ferroglobus placidus. | insight into the mechanisms for the anaerobic metabolism of aromatic compounds by the hyperthermophilic archaeon ferroglobus placidus is expected to improve understanding of the degradation of aromatics in hot (>80°?c) environments and to identify enzymes that might have biotechnological applications. analysis of the f. placidus genome revealed genes predicted to encode enzymes homologous to those previously identified as having a role in benzoate and phenol metabolism in mesophilic bacteria. su ... | 2011 | 21776029 |
| anaerobic oxidation of benzene by the hyperthermophilic archaeon ferroglobus placidus. | anaerobic benzene oxidation coupled to the reduction of fe(iii) was studied in ferroglobus placidus in order to learn more about how such a stable molecule could be metabolized under strict anaerobic conditions. f. placidus conserved energy to support growth at 85-¦c in a medium with benzene provided as the sole electron donor and fe(iii) as the sole electron acceptor. the stoichiometry of benzene loss and fe(iii) reduction, as well as the conversion of [(14)c]benzene to [(14)c]carbon dioxide, w ... | 2011 | 21742914 |
| complete genome sequence of ferroglobus placidus aedii12do. | ferroglobus placidus belongs to the order archaeoglobales within the archaeal phylum euryarchaeota. strain aedii12do is the type strain of the species and was isolated from a shallow marine hydrothermal system at vulcano, italy. it is a hyperthermophilic, anaerobic chemolithoautotroph, but it can also use a variety of aromatic compounds as electron donors. here we describe the features of this organism together with the complete genome sequence and annotation. the 2,196,266 bp genome with its 2, ... | 2011 | 22180810 |