Nitrogen is a quantitatively important bioelement which is incorporated into the biosphere
through assimilatory processes carried out by microorganisms and plants. Numerous …

Nitrogen is a basic element for life because it is a component of the two preeminent
biological macromolecules: proteins and nucleic acids. Nitrogen exists in the biosphere in …

Abstract Dating from the Pre-Cambrian era, cyanobacteria have a long history of adaptation
to the Earth's environment. By evolving oxygen via photosynthetic reactions similar to those …

Nitrate uptake and reduction to nitrite and ammonium are driven in cyanobacteria by
photosynthetically generated assimilatory power, ie, ATP and reduced ferredoxin. High …

Nitrate is a significant nitrogen source for plants and microorganisms. Recent molecular
genetic analyses of representative bacterial species have revealed structural and regulatory …

The element nitrogen (N) constitutes about 5-10% of the dry weight of a cyanobacterial cell.
The purpose of this chapter is to review the assimilatory pathways which in free-living …

In cyanobacteria, ammonium exerts a negative regulation of the expression of proteins
involved in the assimilation of nitrogen sources alternative to ammonium. In Synechococcus …

The marine cyanobacterium Prochlorococcus is the most abundant photosynthetic organism
in oligotrophic regions of the oceans. The inability to assimilate nitrate is considered an …

Over the past two decades, prominent importance of molybdenum-containing enzymes in
prokaryotes has been put forward by studies originating from different fields. Proteomic or …

The cyanobacterial ntcA gene encodes a DNA‐binding protein that belongs to the Crp family
of bacterial transcriptional regulators. In this work, we describe the isolation of an ntcA …