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Glycerol-3-phosphate dehydrogenase (GPDH) is an enzyme that catalyzes the reversible redox conversion of dihydroxyacetone phosphate (a.k.a. glycerone phosphate, outdated) to sn-glycerol 3-phosphate. [2] Glycerol-3-phosphate dehydrogenase serves as a major link between carbohydrate metabolism and lipid metabolism.
The 3 substrates of this enzyme are sn-glycerol 3-phosphate, NAD +, and NADP +, whereas its 4 products are glycerone phosphate, NADH, NADPH, and H +. This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-OH group of donor with NAD + or NADP + as acceptor. The systematic name of this enzyme class is sn ...
In enzymology, a glycerol-3-phosphate dehydrogenase (NAD +) (EC 1.1.1.8) is an enzyme that catalyzes the chemical reaction. sn-glycerol 3-phosphate + NAD + glycerone phosphate + NADH + H + The two substrates of this enzyme are sn-glycerol 3-phosphate and NAD +, whereas its 3 products are glycerone phosphate, NADH, and H +.
The glycerol phosphate shuttle was first characterized as a major route of mitochondrial hydride transport in the flight muscles of blow flies. [5] [6] It was initially believed that the system would be inactive in mammals due to the predominance of lactate dehydrogenase activity over glycerol-3-phosphate dehydrogenase 1 (GPD1) [5] [7] until high GPD1 and GPD2 activity were demonstrated in ...
The common name is "donor dehydrogenase" when possible, such as glyceraldehyde-3-phosphate dehydrogenase for the second reaction above. Common names are also sometimes formed as "acceptor reductase", such as NAD + reductase. "Donor oxidase" is a special case where O 2 is the acceptor.
The encoded cytosolic protein and mitochondrial glycerol-3-phosphate dehydrogenase also form a glycerol phosphate shuttle that facilitates the transfer of reducing equivalents from the cytosol to mitochondria. Mutations in this gene are a cause of transient infantile hypertriglyceridemia.
Identifiers; EC no. 1.1.5.3: CAS no. 9001-49-4 : Alt. names: valpha-glycerophosphate dehydrogenase, alpha-glycerophosphate dehydrogenase (acceptor), anaerobic glycerol-3-phosphate dehydrogenase, DL-glycerol 3-phosphate oxidase (misleading), FAD-dependent glycerol-3-phosphate dehydrogenase, FAD-dependent sn-glycerol-3-phosphate dehydrogenase, FAD-GPDH, FAD-linked glycerol 3-phosphate ...
Glycerol 3-phosphate is synthesized by reducing dihydroxyacetone phosphate (DHAP), an intermediate in glycolysis. The reduction is catalyzed by glycerol-3-phosphate dehydrogenase. DHAP and thus glycerol 3-phosphate can also be synthesized from amino acids and citric acid cycle intermediates via the glyceroneogenesis pathway. + NAD(P)H + H + → ...