A thermophilic, facultative bacterium was isolated from a depth of 3.1 km below ground surface in an ultradeep gold mine in South Africa. This isolate, designated GE-7, was cultivated from pH 8.0, 600C fissure water. GE-7 grows optimally at 650C, pH 6.5 on a wide range of carbon substrates including GE-7 is a long rod-shaped bacterium (4-6 µm long x 0.5 wide) with terminal endospores and flagella, in addition to O2, can also utilize nitrate as an electron acceptor. Phylogenetic analysis of GE-7 16S rDNA sequence revealed high sequence similarity with G. thermoleovorans DSM 5366T (99.6%), however, certain phenotypic characteristics of GE-7 were distinct from this and other strains of G. thermoleovorans previously described.
Revised: April 7, 2011 |
Published: March 8, 2007
Citation
Deflaun M.F., J.K. Fredrickson, H. Dong, S.M. Pfiffner, T.C. Onstott, D.L. Balkwill, and S.H. Streger, et al. 2007.Isolation and Characterization of a Geobacillus thermoleovorans Strain from an Ultra-Deep South African Gold Mine.Systematic and Applied Microbiology 30, no. 2:152-164.PNNL-SA-54449.