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Literature summary extracted from
- Detection of a pteridine oxidase in plants (1980), Plant Sci. Lett., 18, 169-175.
No PubMed abstract available
Inhibitors
| EC Number | Inhibitors | Comment | Organism | Structure |
|---|---|---|---|---|
| 1.17.3.1 | hypoxanthine | - |
Ricinus communis |  |
| 1.17.3.1 | xanthine | - |
Ricinus communis | |
Localization
| EC Number | Localization | Comment | Organism | GeneOntology No. | Textmining |
|---|---|---|---|---|---|
| 1.17.3.1 | cytoplasm | - |
Ricinus communis | 5737 | - |
Molecular Weight [Da]
| EC Number | Molecular Weight [Da] | Molecular Weight Maximum [Da] | Comment | Organism |
|---|---|---|---|---|
| 1.17.3.1 | 310000 | - |
gel filtration | Ricinus communis |
Natural Substrates/ Products (Substrates)
| EC Number | Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
|---|---|---|---|---|---|---|---|
| 1.17.3.1 | 2-amino-4-hydroxypteridine + O2 | Ricinus communis | catabolism of purines via pteridines in plants | 2-amino-4,7-dihydroxypteridine + ? | - |
? | |
Organism
| EC Number | Organism | UniProt | Comment | Textmining |
|---|---|---|---|---|
| 1.17.3.1 | Ricinus communis | - |
castor bean | - |
Purification (Commentary)
| EC Number | Purification (Comment) | Organism |
|---|---|---|
| 1.17.3.1 | partial, using ammonium sulfate precipitation followed by gradient elution from a Celite column | Ricinus communis |
Source Tissue
| EC Number | Source Tissue | Comment | Organism | Textmining |
|---|---|---|---|---|
| 1.17.3.1 | seed | germinating, endosperm tissue | Ricinus communis | - |
Substrates and Products (Substrate)
| EC Number | Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
|---|---|---|---|---|---|---|---|
| 1.17.3.1 | 2-amino-4-hydroxypteridine + O2 | strictly dependent on oxygen | Ricinus communis | 2-amino-4,7-dihydroxypteridine + ? | - |
? | |
| 1.17.3.1 | 2-amino-4-hydroxypteridine + O2 | catabolism of purines via pteridines in plants | Ricinus communis | 2-amino-4,7-dihydroxypteridine + ? | - |
? | |
| 1.17.3.1 | additional information | other electron acceptors such as ferricyanide, cytochrome c, 2,6-dichlorophenol indophenol and methylene blue are ineffective, enzyme does not act on hypoxanthine | Ricinus communis | ? | - |
? | |
Temperature Optimum [°C]
| EC Number | Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
|---|---|---|---|---|
| 1.17.3.1 | 37 | - |
assay at | Ricinus communis |
pH Optimum
| EC Number | pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
|---|---|---|---|---|
| 1.17.3.1 | 6.8 | - |
- |
Ricinus communis |
| 1.17.3.1 | 7 | - |
assay at | Ricinus communis |
pH Range
| EC Number | pH Minimum | pH Maximum | Comment | Organism |
|---|---|---|---|---|
| 1.17.3.1 | 5.2 | 8.1 | half-maximal activity at pH 5.2 and 8.1 | Ricinus communis |
Ki Value [mM]
| EC Number | Ki Value [mM] | Ki Value maximum [mM] | Inhibitor | Comment | Organism | Structure |
|---|---|---|---|---|---|---|
| 1.17.3.1 | 0.016 | - |
hypoxanthine | - |
Ricinus communis | |
| 1.17.3.1 | 0.016 | - |
xanthine | - |
Ricinus communis | |
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Release 2023.1 (January 2023)
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