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Alkene monooxygenase

Class of enzymes From Wikipedia, the free encyclopedia

Alkene monooxygenase (EC 1.14.13.69) is an enzyme that catalyzes the chemical reaction

+ NADH + H+
 
 
O2
H2O
Rightward reaction arrow with minor substrate(s) from top left and minor product(s) to top right
 
 
 
+ NAD+
 

The four substrates of this enzyme are propylene, reduced nicotinamide adenine dinucleotide (NADH), oxygen, and a proton. Its products are propylene oxide, oxidised NAD+, and water.[1][2]

This enzyme is an oxidoreductase, acting on paired donors, with molecular oxygen as oxidant and incorporating one of its atoms. The systematic name of this enzyme class is alkene,NADH:oxygen oxidoreductase. This enzyme is also called alkene epoxygenase. It contains a Rieske type of ferredoxin.[3][4]

Substrate range

The enzyme from a Xanthobacter bacterial species has four peptide components, all of which are required for activity. These oxidise a large range of double bonds, including internal or terminal alkenes and chlorinated derivatives.[5]

When propene is the substrate, the epoxide product is 95% the (R) enantiomer.[6]

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