Vitamin K epoxide reductase

Vitamin K epoxide reductase (VKOR) is an enzyme (EC 1.1.4.1) that reduces vitamin K after it has been oxidised in the carboxylation of glutamic acid. Its C1 subunit (VKORC1) is the target of anticoagulant warfarin.^[1]^[2]

[edit] References

^ Li T, Chang CY, Jin DY, Lin PJ, Khvorova A, Stafford DW. Identification of the gene for vitamin K epoxide reductase. Nature 2004;427(6974):541-4. PMID 14765195.
^ Rost S, Fregin A, Ivaskevicius V, Conzelmann E, Hortnagel K, Pelz HJ, Lappegard K, Seifried E, Scharrer I, Tuddenham EG, Muller CR, Strom TM, Oldenburg J. Mutations in VKORC1 cause warfarin resistance and multiple coagulation factor deficiency type 2. Nature 2004;427(6974):537-41. PMID 14765194.

v • d • e Oxidoreductases: alcohol oxidoreductases (EC 1.1)

1.1.1 NAD/NADP acceptor	Carbohydrate dehydrogenases - Alcohol dehydrogenase - Glycerol-3-phosphate dehydrogenase - L-xylulose reductase - Aldose reductase - Lactate dehydrogenase - 3-Hydroxyacyl CoA dehydrogenase - Malate dehydrogenase - Isocitrate dehydrogenase - Phosphogluconate dehydrogenase - Glucose-6-phosphate dehydrogenase - HMG-CoA reductase - Β-Ketoacyl ACP reductase - Hydroxysteroid dehydrogenase: 11 Beta (HSD11B1, HSD11B2) - 3 Beta (3-beta-HSD) - 17 Beta - Carnitine dehydrogenase - Beta-hydroxybutyryl-CoA dehydrogenase - IMP dehydrogenase - DXP reductoisomerase - L-threonine dehydrogenase

1.1.2 cytochrome acceptor	Mannitol dehydrogenase (cytochrome) - D-lactate dehydrogenase (cytochrome) - D-lactate dehydrogenase (cytochrome c-553)

1.1.3 oxygen acceptor	Glucose oxidase - L-gulonolactone oxidase - Xanthine oxidase

1.1.4 disulfide as acceptor	Vitamin K epoxide reductase - Vitamin-K-epoxide reductase (warfarin-insensitive)

1.1.5 quinone/similar acceptor	Quinoprotein glucose dehydrogenase

1.1.99 other acceptors	Choline dehydrogenase

v • d • e Metabolism of vitamins, coenzymes, and cofactors

Vitamin A	Retinol binding protein

Thiamine (B1)	Thiamine pyrophosphokinase

Niacin (B3)	Indoleamine 2,3-dioxygenase - Formamidase

Folic acid (B9)	Dihydropteroate synthetase - Dihydrofolate reductase - Serine hydroxymethyltransferase

Vitamin C	L-gulonolactone oxidase

Vitamin D	25-Hydroxyvitamin D3 1-alpha-hydroxylase - CYP27A1

Vitamin K	Vitamin K epoxide reductase