The enzyme altronate dehydratase () 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>-altronate hydro-lyase (2-dehydro-3-deoxy-<small>D</small>-gluconate-forming). This enzyme is also called <small>D</small>-altronate hydro-lyase. This enzyme participates in pentose and glucuronate interconversions.