Activating Compound | Comment | Organism | Structure |
---|---|---|---|
monogalactosyldiacylglycerol | required for an active enzyme. Optimal ratio of monogalactosyldiacylglycerol to the substrate violaxanthin is 28:1 | Lactuca sativa |
KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.000049 | - |
violaxanthin | pH 5.1, 26°C, at the optimal ratio of monogalactosyldiglyceride to the substrate violaxanthin is 28:1 | Lactuca sativa | |
0.00145 | - |
violaxanthin | pH 5.1, 26°C, at an ratio of monogalactosyldiacylglyceride to the substrate violaxanthin is 45:1 | Lactuca sativa |
Localization | Comment | Organism | GeneOntology No. | Textmining |
---|---|---|---|---|
chloroplast | - |
Lactuca sativa | 9507 | - |
Molecular Weight [Da] | Molecular Weight Maximum [Da] | Comment | Organism |
---|---|---|---|
60000 | - |
gel filtration | Lactuca sativa |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Lactuca sativa | - |
var. Romaine | - |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
antheraxanthin + ascorbate | the activity is 5.25fold higher than the activity of violaxanthin | Lactuca sativa | zeaxanthin + dehydroascorbate + H2O | - |
? | |
cryptoxanthin epoxide + ascorbate | 92% of the activity with violaxanthin | Lactuca sativa | ? | - |
? | |
diadinoxanthin + ascorbate | the activity is 2.25fold higher than the activity of violaxanthin | Lactuca sativa | ? | - |
? | |
lutein epoxide + ascorbate | the activity is 1.33fold higher than the activity of violaxanthin | Lactuca sativa | ? | - |
? | |
additional information | the enzyme is inactive against monoepoxy and diepoxy beta-carotene, antheraxanthin-A and lutein epoxide | Lactuca sativa | ? | - |
? | |
neoxanthin + ascorbate | 10% of the activity with violaxanthin | Lactuca sativa | ? | - |
? | |
violaxanthin + ascorbate | - |
Lactuca sativa | antheraxanthin + dehydroascorbate + H2O | - |
? |