Diol dehydratase-reactivating factor small subunit

UniProtKB accession:  O68196

Grouped By:  Matching UniProtKB accession

UniProtKB description:  Small subunit of the diol dehydratase-reactivating factor (DDR), which reactivates suicidally inhibited adenosylcobalamin-dependent diol dehydratase (DD, pddA, pddB, pddC). DDR acts as a chaperone, reactivates inactivated DD holoenzyme in the presence of ATP, Mg(2+) and free adenosylcobalamin (AdoCbl), by mediating the exchange of the tightly bound damaged cofactor AdoCbl for a free intact one (PubMed:10529189, PubMed:17916188, PubMed:18586770, PubMed:21040475, PubMed:9405397, PubMed:9920879). Reactivation takes place in two steps: ADP-dependent cobalamin release, and ATP-dependent dissociation of the DD apoenzyme-DDR complex. DDR has weak ATPase activity which is required for DD reactivation (PubMed:10529189, PubMed:17916188, PubMed:21040475). Activates glycerol-inactivated, O2-inactivated holoenzyme and inactivated enzyme-cyanocobalamin complex (PubMed:9920879). Also reactivates glycerol-inactivated hologlycerol dehydratase, a DD isozyme (PubMed:17916188).