Pyrobaculum arsenaticum DSM 13514

Pyrobaculum arsenaticum (strain DSM 13514 / JCM 11321) is a strictly anaerobic, hyperthermophilic, facultative organotrophic archaeon phylogenetically associated with the kingdom Crenarchaeota. This strain was isolated from a hot spring at Pisciarelli Solfatara, Naples, Italy. The rod-shaped cells grew chemolithoautotrophically with carbon dioxide as carbon source, hydrogen as electron donor and arsenate, thiosulfate or elemental sulfur as electron acceptor. H2S was formed from sulfur or thiosulfate, arsenite from arsenate. Organotrophically, the new isolate grew optimally in the presence of an inorganic electron acceptor like sulfur, selenate or arsenate. Cultures, grown on arsenate and thiosulfate or arsenate and L-cysteine, precipitated realgar (As2S2). During growth on selenate, elemental selenium was produced. (HAMAP: PYRAR)