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Information on EC 1.11.1.11 - L-ascorbate peroxidase

for references in articles please use BRENDA:EC1.11.1.11

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IUBMB Comments

A heme protein. Oxidizes ascorbate and low molecular weight aromatic substrates. The monodehydroascorbate radical produced is either directly reduced back to ascorbate by EC 1.6.5.4 [monodehydroascorbate reductase (NADH)] or undergoes non-enzymic disproportionation to ascorbate and dehydroascorbate.

The enzyme appears in viruses and cellular organisms
Reaction Schemes
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2
L-ascorbate
+
H2O2
+
2
H+
=
L-ascorbate
+
L-dehydroascorbate
+
2
H2O
2
+
+
2
=
+
+
2

Synonyms
ascorbate peroxidase, apex2, cytosolic ascorbate peroxidase, lmapx, ascorbate peroxidase 2, l-ascorbate peroxidase, ascorbate peroxidase 1, ascorbic acid peroxidase, osapx8, osapx2, more

REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
2 L-ascorbate + H2O2 + 2 H+ = 2 monodehydroascorbate + 2 H2O
show the reaction diagram
2 L-ascorbate + H2O2 + 2 H+ = L-ascorbate + L-dehydroascorbate + 2 H2O
show the reaction diagram
overall reaction
-
-
-
2 monodehydroascorbate = L-ascorbate + L-dehydroascorbate
show the reaction diagram
spontaneous
-
-
-
PATHWAY SOURCE
PATHWAYS
MetaCyc
L-ascorbate degradation II (bacterial, aerobic), L-ascorbate degradation III