ID 4.2.1.120 DE 4-hydroxybutanoyl-CoA dehydratase. CA 4-hydroxybutanoyl-CoA = (2E)-butenoyl-CoA + H2O. CC -!- The enzyme has been characterized from several microorganisms, CC including Clostridium kluyveri, where it participates in succinate CC fermentation, Clostridium aminobutyricum, where it participates in CC 4-aminobutyrate degradation, and Metallosphaera sedula, where it CC participates in the 3-hydroxypropionate/4-hydroxybutyrate cycle, CC an autotrophic CO2 fixation pathway found in some thermoacidophilic CC archaea. DR P55792, HDVD_CLOAM ; //