Nitrogenase harbors three distinct metal prosthetic groups that are required for its activity.
The simplest one is a [4Fe-4S] cluster located at the Fe protein nitrogenase component. The …

The nitrate anion is a simple, abundant and relatively stable species, yet plays a significant
role in global cycling of nitrogen, global climate change, and human health. Although it has …

ATP-binding cassette transporters are multi-subunit membrane pumps that transport
substrates across membranes. While significant in the transport process, transporter …

Transport across cellular membranes is an essential process that is catalyzed by diverse
membrane transport proteins. The turnover rates of certain transporters are inhibited by their …

Molybdate is transported in bacteria by a high-affinity transport system composed of a
periplasmic binding protein, an integral membrane protein, and an energizer protein. These …

Understanding how Nature accomplishes the reduction of inert nitrogen gas to form
metabolically tractable ammonia at ambient temperature and pressure has challenged …

In both bacteria and archaea, molybdate is transported by an ABC-type transporter
comprising three proteins, ModA (periplasmic binding protein), ModB (membrane protein) …

Biological nitrogen fixation, the main source of new nitrogen to the Earth's ecosystems, is
catalysed by the enzyme nitrogenase. There are three nitrogenase isoenzymes: the Mo …

The nitrogen-fixing microbe Azotobacter vinelandii has the ability to produce three
genetically distinct, but mechanistically similar, components that catalyze nitrogen fixation …

The expression of the moa locus, which encodes enzymes required for molybdopterin
biosynthesis, is enhanced under anaerobiosis but repressed when the bacterium is able to …