If the atmosphere of the early Earth was hydrogen-rich, 1 it is reasonable to think that
hydrogenases, the enzymes enabling cells to use molecular hydrogen, were probably …

The utilization of hydrogen by micro-organisms as a source of reducing power or of protons
as final electron acceptors is mediated by metalloenzymes called hydrogenases. The need …

Hydrogenases (H2ases) catalyze the reversible oxidation of molecular hydrogen and play a
central role in microbial energy metabolism. Most of these enzymes are found in Archaea …

High levels of anthropogenic CO 2 emissions are driving the warming of global climate. If
this pattern of increasing emissions does not change, it will cause further climate change …

Many microorganisms, such as methanogenic, acetogenic, nitrogen-fixing, photosynthetic,
or sulfate-reducing bacteria, metabolize hydrogen.[1, 2a] Hydrogen activation is mediated by …

Two-component signal-transducing systems are ubiquitously distributed communication
interfaces in bacteria. They consist of a histidine kinase that senses a specific environmental …

Nickel is an essential nutrient for selected microorganisms where it participates in a variety
of cellular processes. Many microbes are capable of sensing cellular nickel ion …

Hydrogen, the most abundant element in the Universe, is considered to be an environmental
friendly energy carrier because its combustion generates water. Nowadays, owing to the …

Biological H2 production offers distinctive advantages for environmental protection over
existing physico-chemical methods. This study focuses specifically on hydrogenases, a …

There continues to be widespread interest in the applications of hydrogen as a clean fuel
and its potential for local electricity production and use in transport. Recent years have seen …