L-ascorbate oxidase

L-ascorbate oxidase
Identifiers
EC number 1.10.3.3
CAS number 9029-44-1
Databases
IntEnz IntEnz view
BRENDA BRENDA entry
ExPASy NiceZyme view
KEGG KEGG entry
MetaCyc metabolic pathway
PRIAM profile
PDB structures RCSB PDB PDBe PDBsum
Gene Ontology AmiGO / EGO

In enzymology, a L-ascorbate oxidase (EC 1.10.3.3) is an enzyme that catalyzes the chemical reaction

2 L-ascorbate + O2 \rightleftharpoons 2 dehydroascorbate + 2 H2O

Thus, the two substrates of this enzyme are L-ascorbate and O2, whereas its two products are dehydroascorbate and H2O.

This enzyme belongs to the family of oxidoreductases, specifically those acting on diphenols and related substances as donor with oxygen as acceptor. The systematic name of this enzyme class is L-ascorbate:oxygen oxidoreductase. Other names in common use include ascorbase, ascorbic acid oxidase, ascorbate oxidase, ascorbic oxidase, ascorbate dehydrogenase, L-ascorbic acid oxidase, AAO, L-ascorbate:O2 oxidoreductase, and AA oxidase. This enzyme participates in ascorbate metabolism. It employs one cofactor, copper.

Structural studies

As of late 2007, 4 structures have been solved for this class of enzymes, with PDB accession codes 1AOZ, 1ASO, 1ASP, and 1ASQ.

References