ID 5.5.1.27 DE D-galactarolactone cycloisomerase. CA (1) D-galactaro-1,4-lactone = 5-dehydro-4-deoxy-D-glucarate + H(+). CA (2) D-glucaro-1,4-lactone = 5-dehydro-4-deoxy-D-glucarate + H(+). CC -!- The enzyme, characterized from the bacterium Agrobacterium fabrum CC strain C58, is involved in degradation of D-galacturonate and CC D-glucuronate. CC -!- Activity with D-galactaro-1,4-lactone is 4-fold higher than with CC D-glucaro-1,4-lactone. DR A9CEQ8, GCI_AGRFC ; //