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In enzymology, an ADP-sugar diphosphatase (EC 3.6.1.21) is an enzyme that catalyzes the chemical reaction

ADP-sugar + H₂O

\rightleftharpoons

AMP + alpha-D-aldose 1-phosphate

Thus, the two substrates of this enzyme are ADP-sugar and H₂O, whereas its two products are AMP and alpha-D-aldose 1-phosphate.

This enzyme belongs to the family of hydrolases, specifically those acting on acid anhydrides in phosphorus-containing anhydrides. The systematic name of this enzyme class is ADP-sugar sugarphosphohydrolase. Other names in common use include ADP-sugar pyrophosphatase, and adenosine diphosphosugar pyrophosphatase. This enzyme participates in 3 metabolic pathways: fructose and mannose metabolism, purine metabolism, and starch and sucrose metabolism.

References

Rodriguez P, Bass ST, Hansen RG (1968). "A pyrophosphatase from mammalian tissues specific for derivatives of ADP". Biochim. Biophys. Acta. 167 (1): 199–201. doi:10.1016/0005-2744(68)90294-5. PMID 5686292.

Enzymes
Activity	Active site Binding site Catalytic triad Oxyanion hole Enzyme promiscuity Diffusion-limited enzyme Cofactor Enzyme catalysis
Regulation	Allosteric regulation Cooperativity Enzyme inhibitor Enzyme activator
Classification	EC number Enzyme superfamily Enzyme family List of enzymes
Kinetics	Enzyme kinetics Eadie–Hofstee diagram Hanes–Woolf plot Lineweaver–Burk plot Michaelis–Menten kinetics
Types	EC1 Oxidoreductases (list) EC2 Transferases (list) EC3 Hydrolases (list) EC4 Lyases (list) EC5 Isomerases (list) EC6 Ligases (list) EC7 Translocases (list)

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References

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