Cloned (Comment) | Organism |
---|---|
expressed in Escherichia coli | Arabidopsis thaliana |
Inhibitors | Comment | Organism | Structure |
---|---|---|---|
4-chloromercuribenzoate | both NADPH and NADP1 suppress the inhibition, but NADH does not | Arabidopsis thaliana | |
dicoumarol | mixed-type inhibition against NADPH | Arabidopsis thaliana | |
N-ethylmaleimide | both NADPH and NADP1 suppress the inhibition, but NADH does not | Arabidopsis thaliana | |
Nitrofurantoin | uncompetitive against NADPH | Arabidopsis thaliana |
KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.00065 | - |
9,10-phenanthrenequinone | pH 7.5 | Arabidopsis thaliana | |
0.0025 | - |
NADPH | pH 7.5, cosubstrate: 9,10-phenanthrenequinone | Arabidopsis thaliana | |
0.011 | - |
5-hydroxy-1,4-naphthoquinone | pH 7.5 | Arabidopsis thaliana | |
0.013 | - |
9,10-phenanthrenequinone | pH 7.5 | Cavia porcellus | |
0.02 | - |
Ferricytochrome | pH 7.5 | Arabidopsis thaliana | |
0.025 | - |
decyl-plastoquinone | pH 7.5 | Arabidopsis thaliana | |
0.027 | - |
5-hydroxy-1,4-naphthoquinone | pH 7.5 | Cavia porcellus | |
0.143 | - |
1,4-benzoquinone | pH 7.5 | Cavia porcellus | |
0.152 | - |
1,4-benzoquinone | pH 7.5 | Arabidopsis thaliana |
Localization | Comment | Organism | GeneOntology No. | Textmining |
---|---|---|---|---|
cytosol | it is possible that Arabidopsis P1-ZCr functions as a quinone reductase in vivo. Possible substrate quinones are not abundant in the cytosol, but under severe stress the quinones might be liberated from the cell compartments where they are normally sequestered, as exemplified by the release of polyphenols from vacuoles and polyphenol oxidase from thylakoid lumen upon the disruption of cells. Quinone reduction would not lead to the radical chain reaction, because superoxide dismutase is ubiquitous in cells | Arabidopsis thaliana | 5829 | - |
Molecular Weight [Da] | Molecular Weight Maximum [Da] | Comment | Organism |
---|---|---|---|
38700 | - |
2 * 38700, recombinant P1-ZCr is a noncovalent dimer, SDS-PAGE | Arabidopsis thaliana |
83200 | - |
gel filtration | Arabidopsis thaliana |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Arabidopsis thaliana | - |
- |
- |
Cavia porcellus | - |
- |
- |
Purification (Comment) | Organism |
---|---|
- |
Cavia porcellus |
- |
Arabidopsis thaliana |
Source Tissue | Comment | Organism | Textmining |
---|---|---|---|
lens | - |
Cavia porcellus | - |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
1,2-naphthoquinone + NADPH + H+ | production of semiquinone by univalent catalysts is detectable by the reduction of ferricytochrome c by the semiquinone to ferrocytochrome c | Cavia porcellus | 1,2-naphthosemiquinone + NADP+ | - |
? | |
1,4-benzoquinone + NADPH + H+ | production of semiquinone by univalent catalysts is detectable by the reduction of ferricytochrome c by the semiquinone to ferrocytochrome c | Cavia porcellus | 1,4-benzosemiquinone + NADP+ | - |
? | |
1,4-naphthoquinone + NADPH + H+ | - |
Arabidopsis thaliana | 1,4-naphthosemiquinone + NADP+ | - |
? | |
1,4-naphthoquinone + NADPH + H+ | production of semiquinone by univalent catalysts is detectable by the reduction of ferricytochrome c by the semiquinone to ferrocytochrome c | Cavia porcellus | 1,4-naphthosemiquinone + NADP+ | - |
? | |
2 1,2-naphthoquinone + NADPH + H+ | production of semiquinone by univalent catalysts is detectable by the reduction of ferricytochrome c by the semiquinone to ferrocytochrome c | Arabidopsis thaliana | 2 1,2-naphthosemiquinone + NADP+ | - |
? | |
2 1,4-benzoquinone + NADPH + H+ | production of semiquinone by univalent catalysts is detectable by the reduction of ferricytochrome c by the semiquinone to ferrocytochrome c | Arabidopsis thaliana | 2 1,4-benzosemiquinone + NADP+ | - |
? | |
2 1,4-naphthosemiquinone + NADPH + H+ | production of semiquinone by univalent catalysts is detectable by the reduction of ferricytochrome c by the semiquinone to ferrocytochrome c | Arabidopsis thaliana | 2 1,4-naphthosemiquinone + NADP+ | - |
? | |
2 5-hydroxy-1,4-naphthoquinone + NADPH + H+ | i.e. juglone. Production of semiquinone by univalent catalysts is detectable by the reduction of ferricytochrome c by the semiquinone to ferrocytochrome c | Arabidopsis thaliana | 2 5-hydroxy-1,4-naphthosemiquinone + NADP+ | - |
? | |
2 5-hydroxy-2-methyl-1,4-naphthoquinone + NADPH + H+ | i.e. plumbagin. Production of semiquinone by univalent catalysts is detectable by the reduction of ferricytochrome c by the semiquinone to ferrocytochrome c | Arabidopsis thaliana | 5-hydroxy-2-methyl-1,4-naphthoquinone + NADP+ | - |
? | |
2 9,10-phenanthrenequinone + NADPH + H+ | production of semiquinone by univalent catalysts is detectable by the reduction of ferricytochrome c by the semiquinone to ferrocytochrome c | Arabidopsis thaliana | 2 9,10-phenanthrenesemiquinone + NADP+ | - |
? | |
2 decyl-plastoquinone + NADPH + H+ | production of semiquinone by univalent catalysts is detectable by the reduction of ferricytochrome c by the semiquinone to ferrocytochrome c | Arabidopsis thaliana | 2 decyl-plastosemiquinone + NADP+ | - |
? | |
5-hydroxy-1,4-naphthoquinone + NADPH + H+ | i.e. juglone. Production of semiquinone by univalent catalysts is detectable by the reduction of ferricytochrome c by the semiquinone to ferrocytochrome c | Cavia porcellus | 5-hydroxy-1,4-naphthosemiquinone + NADP+ | - |
? | |
5-hydroxy-2-methyl-1,4-naphthoquinone + NADPH + H+ | i.e. plumbagin. Production of semiquinone by univalent catalysts is detectable by the reduction of ferricytochrome c by the semiquinone to ferrocytochrome c | Cavia porcellus | 5-hydroxy-2-methyl-1,4-naphthosemiquinone + NADP+ | - |
? | |
9,10-phenanthrenequinone + NADPH + H+ | production of semiquinone by univalent catalysts is detectable by the reduction of ferricytochrome c by the semiquinone to ferrocytochrome c | Cavia porcellus | 9,10-phenanthrenesemiquinone + NADP+ | - |
? | |
dichlorophenolindophenol + NADPH + H+ | - |
Arabidopsis thaliana | reduced dichlorophenolindophenol + NADP+ | - |
? | |
dichlorophenolindophenol + NADPH + H+ | production of semiquinone by univalent catalysts is detectable by the reduction of ferricytochrome c by the semiquinone to ferrocytochrome c | Cavia porcellus | reduced dichlorophenolindophenol + NADP+ | - |
? | |
ferricytochrome + NADPH + H+ | - |
Arabidopsis thaliana | ferrocytochrome + NADP+ | - |
? | |
additional information | no activity with: phylloquinone (vitamin K1), menaquinone (vitamin K2), menadione (vitamin K3) and ferricyanide. Preference for o-quinones over p-quinones, and the inability to recognize menadione and ferricyanide as substrates, clearly distinguishe P1-ZCr and guinea-pig ZCr from the flavin-containing NAD(P)H-quinone oxidoreductases in plants and animals. P1-ZCr also catalyzed the divalent reduction of diamide to 1,2-bis(N,N-dimethylcarbamoyl)hydrazine, with a kcat comparable with that for quinones. Two other azodicarbonyl compounds also served as substrates of P1-ZCr. Guinea-pig ZCr, however, did not catalyze the azodicarbonyl reduction. Hence, plant ZCr is distinct from mammalian ZCr, and can be referred to as NADPH:azodicarbonyl/quinone reductase. The quinone-reducing reaction is accompanied by radical chain reactions to produce superoxide radicals, while the azodicarbonyl reducing reaction is not | Arabidopsis thaliana | ? | - |
? | |
additional information | no activity with: phylloquinone (vitamin K1), menaquinone (vitamin K2), menadione (vitamin K3), ferricytochrome and ferricyanide. Preference for o-quinones over p-quinones, and the inability to recognize menadione and ferricyanide as substrates, clearly distinguishe Arabidopsis thaliana P1-ZCr and guinea-pig ZCr from the flavin-containing NAD(P)H-quinone oxidoreductases in plants and animals | Cavia porcellus | ? | - |
? |
Subunits | Comment | Organism |
---|---|---|
dimer | 2 * 38700, recombinant P1-ZCr is a noncovalent dimer, SDS-PAGE | Arabidopsis thaliana |
Synonyms | Comment | Organism |
---|---|---|
NADPH:azodicarbonyl/quinone reductase | - |
Arabidopsis thaliana |
NADPH:quinone oxidoreductase | - |
Cavia porcellus |
NADPH:quinone oxidoreductase | - |
Arabidopsis thaliana |
P1-ZCr | - |
Arabidopsis thaliana |
P1-zeta-crystallin | - |
Cavia porcellus |
P1-zeta-crystallin | - |
Arabidopsis thaliana |
ZCr | - |
Cavia porcellus |
Turnover Number Minimum [1/s] | Turnover Number Maximum [1/s] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.03 | - |
Ferricytochrome | pH 7.5 | Arabidopsis thaliana | |
0.1 | - |
decyl-plastoquinone | pH 7.5 | Arabidopsis thaliana | |
0.37 | - |
5-Hydroxy-2-methyl-1,4-naphthoquinone | pH 7.5 | Cavia porcellus | |
1 | - |
1,4-Naphthoquinone | pH 7.5 | Cavia porcellus | |
1.5 | - |
dichlorophenolindophenol | pH 7.5 | Cavia porcellus | |
1.9 | - |
5-hydroxy-1,4-naphthoquinone | pH 7.5 | Arabidopsis thaliana | |
3 | - |
1,4-Naphthoquinone | pH 7.5 | Arabidopsis thaliana | |
3.8 | - |
5-hydroxy-2-methyl-1,4-naphtoquinone | pH 7.5 | Arabidopsis thaliana | |
4.9 | - |
5-hydroxy-1,4-naphthoquinone | pH 7.5 | Cavia porcellus | |
5.9 | - |
1,4-benzoquinone | pH 7.5 | Cavia porcellus | |
7.5 | - |
dichlorophenolindophenol | pH 7.5 | Arabidopsis thaliana | |
12 | - |
1,4-benzoquinone | pH 7.5 | Arabidopsis thaliana | |
19 | - |
9,10-phenanthrenequinone | pH 7.5 | Cavia porcellus | |
39 | - |
1,2-naphthoquinone | pH 7.5 | Cavia porcellus | |
54 | - |
1,2-naphthoquinone | pH 7.5 | Arabidopsis thaliana | |
98 | - |
9,10-phenanthrenequinone | pH 7.5 | Arabidopsis thaliana |
pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|
8 | - |
- |
Arabidopsis thaliana |
pH Minimum | pH Maximum | Comment | Organism |
---|---|---|---|
7.5 | 9.2 | half-maximal activity at pH 7.5 and pH 9.2 | Arabidopsis thaliana |
Cofactor | Comment | Organism | Structure |
---|---|---|---|
NADPH | - |
Cavia porcellus | |
NADPH | specificity to NADPH, as judged by kcat/Km, is more than 1000fold higher than that to NADH | Arabidopsis thaliana |