Protoaphin-aglucone dehydratase (cyclizing)

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In enzymology, a protoaphin-aglucone dehydratase (cyclizing) (EC 4.2.1.73) is an enzyme that catalyzes the chemical reaction

protoaphin aglucone xanthoaphin + H₂O

Hence, this enzyme has one substrate, protoaphin aglucone, and two products, xanthoaphin and H₂O.

This enzyme belongs to the family of lyases, specifically the hydro-lyases, which cleave carbon-oxygen bonds. The systematic name of this enzyme class is protoaphin-aglucone hydro-lyase (cyclizing; xanthoaphin-forming). Other names in common use include protoaphin dehydratase, protoaphin dehydratase (cyclizing), and protoaphin-aglucone hydro-lyase (cyclizing).

[edit] References

• IUBMB entry for 4.2.1.73
• BRENDA references for 4.2.1.73 (Recommended.)
• PubMed references for 4.2.1.73
• PubMed Central references for 4.2.1.73
• Google Scholar references for 4.2.1.73
• Cameron DW, Sawyer WH and Trikojus VM (1977). "Colouring matters of the Aphidoidea. XLII. Purification and properties of the cyclising enzyme [Protoaphin dehydratase (cyclising)] concerned with pigment transformation in the wooly aphid Eriosoma lanigerum Hausmann (Hemiptera: Insecta)". Aust. J. Biol. Sci. 30: 173–181. 

[edit] External links

The CAS registry number for this enzyme class is 64177-87-3.

• IUBMB entry for 4.2.1.73

• KEGG entry for 4.2.1.73

• BRENDA entry for 4.2.1.73

• NiceZyme view of 4.2.1.73

• EC2PDB: PDB structures for 4.2.1.73

• PRIAM entry for 4.2.1.73

• PUMA2 entry for 4.2.1.73

• IntEnz: Integrated Enzyme entry for 4.2.1.73

• MetaCyc entry for 4.2.1.73

• Atomic-resolution structures of enzymes belonging to this class

[edit] Gene Ontology (GO) codes

• EGO entry for GO code 0047452: protoaphin-aglucone dehydratase (cyclizing)

• AMIGO entry for GO code 0047452: protoaphin-aglucone dehydratase (cyclizing)