1.17.3.4: juglone 3-hydroxylase

This is an abbreviated version!
For detailed information about juglone 3-hydroxylase, go to the full flat file.

Reaction

2 juglone + 2 H2O = 2 naphthalene-1,2,4,8-tetrol

Synonyms

EC 1.14.99.27, juglone 3-monooxygenase, juglone hydroxylase, naphthoquinone hydroxylase, naphthoquinone-hydroxylase

ECTree

1 Oxidoreductases

1.17 Acting on CH or CH₂ groups

1.17.3 With oxygen as acceptor

1.17.3.4 juglone 3-hydroxylase

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2	General Stability
3	Inhibitors
2	KM Value [mM]
1	Metals/Ions
4	Molecular Weight [Da]
5	Natural Substrates/ Products (Substrates)
6	Organism
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1	Specific Activity [micromol/min/mg]
22	Substrates and Products (Substrate)
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Systematic Name on EC 1.17.3.4 - juglone 3-hydroxylase

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5-hydroxy-1,4-naphthoquinone,water:oxygen oxidoreductase (3-hydroxylating)

Even though oxygen is consumed, molecular oxygen is not incorporated into the product. Catalysis starts by incorporation of an oxygen atom from a water molecule into the substrate. The naphthalene-1,2,4,8-tetrol intermediate is then oxidized by molecular oxygen, which is reduced to water. Also acts on 1,4-naphthoquinone, naphthazarin and 2-chloro-1,4-naphthoquinone.