WikiBiomeThe human microbiome encyclopediaRanked matches across titles, topics, categories, and article introductions, filtered to mechanism.
Ammonia is a nitrogen-containing product of microbial urease activity. When urease hydrolyzes urea, ammonia and bicarbonate are produced; in the microbial systems covered by WikiBiome, those products can provide nitrogen and raise local pH maier 2019 nickel microbial pa…
Fermentative metabolism is the set of anaerobic metabolic pathways by which bacteria break down carbohydrates and amino acids in the absence of oxygen, producing short-chain fatty acids (SCFAs) (primarily butyrate, propionate, acetate), gases (H₂, CO₂, CH₄), and organic…
Nickel-urease (urease, EC 3.5.1.5) is a metalloenzyme that catalyzes the hydrolysis of urea (NH₂-CO-NH₂) to ammonia (NH₃) and carbon dioxide (CO₂). The active site contains two nickel ions (Ni²⁺) coordinated by histidine and cysteine residues. Nickel-urease is expressed…
Saccharolytic fermentation is the microbial breakdown of carbohydrates (dietary fiber, resistant starch, host glycans) to produce short chain fatty acids (acetate, propionate, butyrate) and gases (H₂, CO₂, CH₄). It is the beneficial fermentation mode — the metabolic act…
Urea is the substrate of urease. In the microbial systems covered by WikiBiome, urease hydrolyzes urea to ammonia and bicarbonate; those products can supply microbial nitrogen and help neutralize acidic environments maier 2019 nickel microbial pathogenesis. At a glance,…