Reverse Methanogenesis and Respiration in Methanotrophic Archaea
نویسندگان
چکیده
منابع مشابه
Reverse Methanogenesis and Respiration in Methanotrophic Archaea
Anaerobic oxidation of methane (AOM) is catalyzed by anaerobic methane-oxidizing archaea (ANME) via a reverse and modified methanogenesis pathway. Methanogens can also reverse the methanogenesis pathway to oxidize methane, but only during net methane production (i.e., "trace methane oxidation"). In turn, ANME can produce methane, but only during net methane oxidation (i.e., enzymatic back flux)...
متن کاملDiversity and distribution of methanotrophic archaea at cold seeps.
In this study we investigated by using 16S rRNA-based methods the distribution and biomass of archaea in samples from (i) sediments above outcropping methane hydrate at Hydrate Ridge (Cascadia margin off Oregon) and (ii) massive microbial mats enclosing carbonate reefs (Crimea area, Black Sea). The archaeal diversity was low in both locations; there were only four (Hydrate Ridge) and five (Blac...
متن کاملAerobic H2 respiration enhances metabolic flexibility of methanotrophic bacteria
26 Methanotrophic bacteria are important soil biofilters for the climate-active gas 27 methane. The prevailing opinion is that these bacteria exclusively metabolise single28 carbon, and in limited instances, short-chain hydrocarbons for growth. This specialist 29 lifestyle juxtaposes metabolic flexibility, a key strategy for environmental adaptation 30 of microorganisms. Here we show that a met...
متن کاملThe biosynthetic pathway of coenzyme F430 in methanogenic and methanotrophic archaea.
Methyl-coenzyme M reductase (MCR) is the key enzyme of methanogenesis and anaerobic methane oxidation. The activity of MCR is dependent on the unique nickel-containing tetrapyrrole known as coenzyme F430. We used comparative genomics to identify the coenzyme F430 biosynthesis (cfb) genes and characterized the encoded enzymes from Methanosarcina acetivorans C2A. The pathway involves nickelochela...
متن کاملGrowth and methane oxidation rates of anaerobic methanotrophic archaea in a continuous-flow bioreactor.
Anaerobic methanotrophic archaea have recently been identified in anoxic marine sediments, but have not yet been recovered in pure culture. Physiological studies on freshly collected samples containing archaea and their sulfate-reducing syntrophic partners have been conducted, but sample availability and viability can limit the scope of these experiments. To better study microbial anaerobic met...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Archaea
سال: 2017
ISSN: 1472-3646,1472-3654
DOI: 10.1155/2017/1654237