The anaerobic oxidation of methane coupled to sulfate reduction is a microbially mediated
process requiring a syntrophic partnership between anaerobic methanotrophic (ANME) …

Nitrogenase, which catalyzes the ATP-dependent reduction of dinitrogen (N2) to ammonia
(NH3), accounts for roughly half of the bioavailable nitrogen supporting extant life. The …

The ecophysiology of one candidate methanogen class WSA2 (or Arc I) remains largely
uncharacterized, despite the long history of research on Euryarchaeota methanogenesis. To …

Background The metabolic capacity for nitrogen fixation is known to be present in several
prokaryotic species scattered across taxonomic groups. Experimental detection of nitrogen …

We describe a nitrogenase gene sequence database that facilitates analysis of the evolution
and ecology of nitrogen-fixing organisms. The database contains 32 954 aligned …

The nitrogen input through biological N 2 fixation is essential for life in vast areas of the
global ocean. The belief is that cyanobacteria are the only relevant N 2-fixing (diazotrophic) …

Microbial consortia mediating the anaerobic oxidation of methane with sulfate are composed
of methanotrophic Archaea (ANME) and Bacteria related to sulfate‐reducing …

The origin of nitrogen fixation is an important issue in evolutionary biology. While nitrogen is
required by all living organisms, only a small fraction of bacteria and archaea can fix …

The global diversity of nitrogen‐fixing microorganisms was assessed through construction
and analysis of an aligned database of 16 989 nifH sequences. We conclude that the …

Nitrogenase catalyzes biological nitrogen fixation, a key step in the global nitrogen cycle.
Three homologous nitrogenases have been identified to date, along with several structural …