Gößner, A; Devereux, R; Ohnemüller, N; Acker, G; Stackebrandt, E; Drake, HL: Thermicanus aegyptius gen. nov., sp. nov., isolated from oxic soil, a fermentative microaerophile that grows commensally with the thermophilic acetogen Moorella thermoacetica, Applied and Environmental Microbiology, 65/11, 5124-5133 (1999) | |
Abstract: A thermophilic, fermentative microaerophile (ET-5b) and a thermophilic acetogen (ET-5a) were co-isolated from oxic soil obtained from Egypt. The 16S rRNA gene sequence of ET-5a was 99.8% identical to that of the classic acetogen Moorella thermoacetica. Further analyses confirmed that ET-5a was a new strain of M. thermoacetica. For ET-5b, the nearest 16S rRNA gene sequence similarity value to known genera approximated 88%. ET-5b was a motile rod with a genomic G + C content of 50.3 mol%. Cells were weakly gram positive and lacked spores. Growth was optimal at 55-60°C and pH 6.5-7.0. ET-5b grew under both oxic and anoxic conditions, but growth was erratic under atmospheric concentrations of O |
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