2-dehydro-3-deoxy-phosphogluconate Aldolase

In enzymology, a 2-dehydro-3-deoxy-phosphogluconate aldolase (EC, commonly known as KDPG aldolase, is an enzyme that catalyzes the chemical reaction

2-dehydro-3-deoxy-D-gluconate 6-phosphate pyruvate + D-glyceraldehyde 3-phosphate

Hence, this enzyme primarily has one substrate, 2-dehydro-3-deoxy-D-gluconate 6-phosphate, and two products, pyruvate and D-glyceraldehyde 3-phosphate.

This enzyme belongs to the family of lyases, specifically the aldehyde-lyases, which cleave carbon-carbon bonds. It is used in the Entner–Doudoroff pathway in prokaryotes, feeding into glycolysis. 2-dehydro-3-deoxy-phosphogluconate aldolase is one of the two enzymes distinguishing this pathway from the more commonly known Embden–Meyerhof–Parnas pathway. This enzyme also participates in following 3 metabolic pathways: pentose phosphate pathway, pentose and glucuronate interconversions, and arginine and proline metabolism.

In addition to the cleavege of 2-dehydro-3-deoxy-D-gluconate 6-phosphate, it is also found to naturally catalyze Schiff base formation between a lysine E-amino acid group and carbonyl compounds, decarboxylation of oxaloacetate, and exchange of solvent protons with the methyl hydrogen atoms of pyruvate.

Read more about 2-dehydro-3-deoxy-phosphogluconate AldolaseNomenclature, Enzyme Structure, Enzyme Mechanism

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2-dehydro-3-deoxy-phosphogluconate Aldolase - Evolutionary Significance - History
... evolution of α/β-barrel structured enzymes such as KDPG Aldolase, triosephosphate isomerase, and the A-domain of pyruvate kinase ... KDPG aldolase has limited utility due to its high specificity for its natural substrates in the cleavage of KDPG and the reverse addition of D-glyceraldehyde-3-phosphate ... In vitro evolution has allowed KDPG aldolase to be converted into a more efficient aldolase with altered substrate specificity and stereoselectivity thereby improving its ...