Signaling ammonium across membranes through an ammonium sensor histidine kinase

Role of the Npr1 kinase in ammonium transport and signaling by the ammonium permease Mep2 in Candida albicans.

The ammonium permease Mep2 induces a switch from unicellular yeast to filamentous growth in response to nitrogen limitation in Saccharomyces cerevisiae and Candida albicans. In S. cerevisiae, the function of Mep2 and other ammonium permeases depends on the protein kinase Npr1. Mutants lacking NPR1 cannot grow on low concentrations of ammonium and do not filament under limiting nitrogen conditio...

Riverine anaerobic ammonium oxidation across contrasting geologies

Permeation of ammonia across bilayer lipid membranes studied by ammonium ion selective microelectrodes.

Ammonium ion and proton concentration profiles near the surface of a planar bilayer lipid membrane (BLM) generated by an ammonium ion gradient across the BLM are studied by means of microelectrodes. If the concentration of the weak base is small compared with the buffer capacity of the medium, the experimental results are well described by the standard physiological model in which the transmemb...

Interaction of quaternary ammonium and phosphonium salts with photosynthetic membranes.

Distinct concentration ranges of selected quaternary ammonium and phosphonium salts were elaborated to induce stimulatory or inhibitory effects, respectively, on photosynthetic reactions. By means of fluorescence induction measurements 3 different effects of alkylbenzyldimethylammonium chloride (ABDAC; zephirol) in chloroplast preparations from Pisum sativum were observed. 60 microM ABDAC produ...

Ammonium benzene­phospho­nate

In the crystal structure of the title salt, NH(4) (+).[(C(6)H(5))P(O)(2)(OH)](-) or NH(4) (+)·C(6)H(6)O(3)P(-), the N and O atoms inter-act via hydrogen bonds to generate a layer motif. The phenyl rings are stacked above and below this layer, sandwiching the hydrogen-bonded layer.