This bacterial subfamily of enzymes belongs to the dehydrogenase family with pyrroloquinoline quinone (PQQ) as cofactor, and is the only subfamily that is bound to the membrane. Glucose dehydrogenase converts D-glucose to D-glucono-1,5-lactone in a reaction that is coupled with the respiratory chain in the periplasmic oxidation of sugars and alcohols in gram-negative bacteria. Ubiquinone functions as the electron acceptor. The alignment model contains an 8-bladed beta-propeller.
Jiyao W et al.(2023). "The conserved domain database in 2023.",