CO-Oxidizing Anaerobic Thermophilic Prokaryotes

摘要: Being a potent electron donor (E0' CO/CO2 = −520 mV), CO may serve as an energy source for anaerobic prokaryotes. The main sources of in hot environments inhabited by thermophiles are volcanic exhalations and thermal degradation organic matter. A number phylogenetically diverse prokaryotes, both Bacteria Archaea, known to metabolize CO. transformation be coupled methanogenesis, acetogenesis, hydrogenogenesis, sulfate or ferric iron reduction. This review will mainly focus on the diversity, ecology, physiology, certain genomic features hydrogenogenic species, which most numerous among currently recognized thermophilic carboxydotrophs many were isolated described recent years. Among them Firmicutes, Dictyoglomi, Eury- Crenarchaeota. Despite their phylogenetic they employ similar enzymatic mechanisms СО + Н2О → СО2 Н2 process. key enzyme utilization, Ni-containing dehydrogenase, forms hydrogenogens complex with energy-converting hydrogenase, analysis shows this encoded single-gene cluster.