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Literature summary for 1.11.1.11 extracted from

  • Koshiba, T.
    Cytosolic ascorbate peroxidase in seedlings and leaves of maize (Zea mays) (1993), Plant Cell Physiol., 34, 713-721.
No PubMed abstract available

Inhibitors

Inhibitors Comment Organism Structure
iodoacetate potent inhibitor Zea mays
KCN 87% inhibition at 1 mM Zea mays
NaN3 13% inhibition at 5 mM Zea mays
p-chloromercuribenzoate 95% inhibition at 0.05 mM Zea mays

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.035
-
H2O2
-
Zea mays
0.38
-
ascorbate
-
Zea mays

Localization

Localization Comment Organism GeneOntology No. Textmining
cytoplasm
-
Zea mays 5737
-

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
28000
-
gel filtration Zea mays

Organism

Organism UniProt Comment Textmining
Zea mays
-
-
-

Purification (Commentary)

Purification (Comment) Organism
-
Zea mays

Source Tissue

Source Tissue Comment Organism Textmining
coleoptile
-
Zea mays
-
leaf young leaves contain low amounts of enzyme, in mature green leaves, small amounts of the enzyme are distributed in vascular systems, in particular in companion cells Zea mays
-
mesocotyl
-
Zea mays
-
root
-
Zea mays
-
seed
-
Zea mays
-

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
guaiacol + H2O2 poor electron donor Zea mays ?
-
?
L-ascorbate + H2O2
-
Zea mays dehydroascorbate + H2O
-
?
additional information no activity with NADH Zea mays ?
-
?
pyrogallol + H2O2 238% activity relative to L-ascorbate Zea mays 3-hydroxybenzo-1,2-quinone + H2O
-
?

Subunits

Subunits Comment Organism
monomer 1 * 28000, SDS-PAGE Zea mays

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
5 6
-
Zea mays

Cofactor

Cofactor Comment Organism Structure
heme one protoheme moiety per molecule Zea mays