tailieunhanh - Báo cáo y học: "A genomic view of methane oxidation by aerobic bacteria and anaerobic archaea"

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học quốc tế cung cấp cho các bạn kiến thức về ngành y đề tài: A genomic view of methane oxidation by aerobic bacteria and anaerobic archaea. | Minireview A genomic view of methane oxidation by aerobic bacteria and anaerobic archaea Ludmila Chistoserdova Julia A VorholL and Mary E Lidstrom Addresses Department of Chemical Engineering and Departments of Chemical Engineering and Microbiology University of Washington Seattle WA 98195 USA. TLaboratorie des Interactions Plantes-Microorganismes 31326 Castanet-Tolosan France. Correspondence Ludmila Chistoserdova. E-mail milachis@ Published I February 2005 Genome Biology 2005 6 208 The electronic version of this article is the complete one and can be found online at http 2005 6 2 208 2005 BioMed Central Ltd Abstract Recent sequencing of the genome and proteomic analysis of a model aerobic methanotrophic bacterium Methylococcus capsulatus Bath has revealed a highly versatile metabolic potential. In parallel environmental genomics has provided glimpses into anaerobic methane oxidation by certain archaea further supporting the hypothesis of reverse methanogenesis. Methane is a powerful greenhouse gas and its atmospheric concentration has been steadily increasing over the past 300 years. There are two major ways in which methane is removed from the environment aerobic oxidation by a specialized group of bacteria and anaerobic oxidation by a specialized group of archaea. The former is important for keeping methane concentrations balanced in freshwater sediments and soils whereas the latter is the major process in anoxic marine environments. The biochemistry of aerobic methane oxidation is relatively well understood following intensive research efforts with a number of model organisms but the biochemistry of anaerobic methane oxidation is not yet fundamentally understood and no anaerobic methane-oxidizer has been isolated in pure culture so far. Three recent studies using global approaches 1-3 have shed new light on both aerobic and anaerobic systems. Here we first review background information on the two metabolic systems involving .