Query: NC_010531:428000 Polynucleobacter necessarius STIR1, complete genome
Lineage: Polynucleobacter necessarius; Polynucleobacter; Burkholderiaceae; Burkholderiales; Proteobacteria; Bacteria
General Information: This strain is an obligate intracellular endosymbiont of the cilliate Euplotes aediculatus. This group of organisms is common in freshwater, comprising up to 60% of the bacteria in freshwater habitats. Polynucleobacter species are also known to be endosymbionts of ciliates. These strains live within the cytoplasm and are essential for their host organisms.
Subject: NC_010424:214640 Candidatus Desulforudis audaxviator MP104C, complete genome
Lineage: Desulforudis audaxviator; Desulforudis; Peptococcaceae; Clostridiales; Firmicutes; Bacteria
General Information: Its genome indicates a motile, sporulating, sulfate-reducing, chemoautotrophic thermophile that can fix its own nitrogen and carbon by using machinery shared with archaea. Candidatus Desulforudis audaxviator is a gram positive sulfate reducing bacteria identified in fracture water from a borehole at a depth of 2.8 km in a South African gold mine. Water from these boreholes is very old (low-biodiversity fracture water), suggesting that these bacteria have been isolated from the Earth's surface for as much as several million years.