Dissimilatory sulphate reduction is the unifying and defining trait of sulphate-reducing
prokaryotes (SRP). In their predominant habitats, sulphate-rich marine sediments, SRP have …

The sequential flow of electrons in the respiratory chain, from a low reduction potential
substrate to O2, is mediated by protein-bound redox cofactors. In mitochondria, hemes …

Farmed ruminants are the largest source of anthropogenic methane emissions globally. The
methanogenic archaea responsible for these emissions use molecular hydrogen (H2) …

Background Our view of host-associated microbiota remains incomplete due to the presence
of as yet uncultured constituents. The Bacteroidales family S24-7 is a prominent example of …

The mitochondrial respiratory Complex II or succinate: ubiquinone oxidoreductase (SQR) is
an integral membrane protein complex in both the tricarboxylic acid cycle and aerobic …

In marine systems, nitrate is the major reservoir of inorganic fixed nitrogen. The only known
biological nitrate-forming reaction is nitrite oxidation, but despite its importance, our …

Tetrahymena thermophila, a classic ciliate model organism, has been shown to possess
tubular mitochondrial cristae and highly divergent electron transport chain involving four …

▪ Abstract Lateral gene transfer (LGT) is now known to be a major force in the evolution of
prokaryotic genomes. To date, most analyses have focused on either (a) verifying …

Archaebacterial halophiles (Haloarchaea) are oxygen-respiring heterotrophs that derive
from methanogens—strictly anaerobic, hydrogen-dependent autotrophs. Haloarchaeal …

Behind the versatile nature of prokaryotic energy metabolism is a set of redox proteins
having a highly modular character. It has become increasingly recognized that a limited …