The enzyme <small>D</small>-glutamate cyclase () catalyzes the chemical reaction
This enzyme belongs to the family of lyases, specifically the hydro-lyases, which cleave carbon-oxygen bonds. The systematic name of this enzyme class is <small>D</small>-glutamate hydro-lyase (cyclizing; 5-oxo-<small>D</small>-proline-forming). This enzyme is also called <small>D</small>-glutamate hydro-lyase (cyclizing). This enzyme participates in <small>D</small>-glutamine and <small>D</small>-glutamate metabolism.