In
enzymology
Enzymes () are proteins that act as biological catalysts by accelerating chemical reactions. The molecules upon which enzymes may act are called substrates, and the enzyme converts the substrates into different molecules known as products. A ...
, a vitamin-K-epoxide reductase (warfarin-insensitive) () is an
enzyme that
catalyzes
Catalysis () is the process of increasing the rate of a chemical reaction by adding a substance known as a catalyst (). Catalysts are not consumed in the reaction and remain unchanged after it. If the reaction is rapid and the catalyst recyc ...
the
chemical reaction
:3-hydroxy-2-methyl-3-phytyl-2,3-dihydronaphthoquinone + oxidized dithiothreitol
2,3-epoxy-2,3-dihydro-2-methyl-3-phytyl-1,4-naphthoquinone + 1,4-dithiothreitol
Thus, the two
substrates of this enzyme are
3-hydroxy-2-methyl-3-phytyl-2,3-dihydronaphthoquinone and
oxidized dithiothreitol
Redox (reduction–oxidation, , ) is a type of chemical reaction in which the oxidation states of substrate (chemistry), substrate change. Oxidation is the loss of Electron, electrons or an increase in the oxidation state, while reduction ...
, whereas its two
products are
2,3-epoxy-2,3-dihydro-2-methyl-3-phytyl-1,4-naphthoquinone and
1,4-dithiothreitol.
This enzyme belongs to the family of
oxidoreductases, specifically those acting on the CH or CH2 groups of donor with a disulfide as acceptor. The
systematic name of this enzyme class is 3-hydroxy-2-methyl-3-phytyl-2,3-dihydronaphthoquinone:oxidized-dithi othreitol oxidoreductase.
References
*
EC 1.17.4
Enzymes of unknown structure
{{1.17-enzyme-stub