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Literature summary for 1.11.1.11 extracted from
- Ascorbate peroxidase, a scavenger of hydrogen peroxide in glyoxysomal membranes (2005), Arch. Biochem. Biophys., 434, 248-257.
KM Value [mM]
| KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
|---|---|---|---|---|---|
| 0.06 | - |
H2O2 | pH 7.5, 25°C | Ricinus communis |  |
| 0.3 | - |
ascorbate | pH 7.5, 25°C | Ricinus communis | |
Localization
| Localization | Comment | Organism | GeneOntology No. | Textmining |
|---|---|---|---|---|
| glyoxysome | - |
Ricinus communis | 9514 | - |
Molecular Weight [Da]
| Molecular Weight [Da] | Molecular Weight Maximum [Da] | Comment | Organism |
|---|---|---|---|
| 34000 | - |
x * 34000, SDS-PAGE | Ricinus communis |
Natural Substrates/ Products (Substrates)
| Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
|---|---|---|---|---|---|---|
| additional information | Ricinus communis | can cooperate with monodehydroascorbate reductase in glyoxysomal membrane to oxidize NADH, regenerate ascorbate, detoxify H2O2 | ? | - |
? | |
Organism
| Organism | UniProt | Comment | Textmining |
|---|---|---|---|
| Ricinus communis | - |
- |
- |
Posttranslational Modification
| Posttranslational Modification | Comment | Organism |
|---|---|---|
| additional information | hemoprotein | Ricinus communis |
Purification (Commentary)
| Purification (Comment) | Organism |
|---|---|
- |
Ricinus communis |
Source Tissue
| Source Tissue | Comment | Organism | Textmining |
|---|---|---|---|
| seed | germinating | Ricinus communis | - |
Specific Activity [micromol/min/mg]
| Specific Activity Minimum [µmol/min/mg] | Specific Activity Maximum [µmol/min/mg] | Comment | Organism |
|---|---|---|---|
| 378 | - |
pH 7.5, 25°C | Ricinus communis |
Substrates and Products (Substrate)
| Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
|---|---|---|---|---|---|---|
| guaiacol + H2O2 | 20% of the activity with ascorbate | Ricinus communis | ? + H2O | - |
? | |
| L-ascorbate + H2O2 | - |
Ricinus communis | dehydroascorbate + H2O | - |
? | |
| additional information | can cooperate with monodehydroascorbate reductase in glyoxysomal membrane to oxidize NADH, regenerate ascorbate, detoxify H2O2 | Ricinus communis | ? | - |
? | |
| pyrogallol + H2O2 | 32% of the activity with ascorbate | Ricinus communis | ? + H2O | - |
? | |
Subunits
| Subunits | Comment | Organism |
|---|---|---|
| ? | x * 34000, SDS-PAGE | Ricinus communis |
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Release 2023.1 (January 2023)
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