2 H(+) + H2O + urea = CO2 + 2 NH4(+) Nitrogen metabolism; urea degradation; CO(2) and NH(3) from urea (urease route): step 1/1. Heterohexamer of 3 UreC (alpha) and 3 UreAB (gamma/beta) subunits. In the N-terminal section; belongs to the urease gamma subunit family. In the C-terminal section; belongs to the urease beta subunit family.