Reaction Process: PathBank:SMP0000278
Lepirudin Action Pathway related metabolites
find 2 related metabolites which is associated with chemical reaction(pathway) Lepirudin Action Pathway
Reduced Vitamin K (phylloquinone) ⟶ Vitamin K1 2,3-epoxide
Vitamin K1 2,3-epoxide
Vitamin K1 2,3-epoxide (CAS: 25486-55-9) is a vitamin K derivative. Vitamin K is needed for the posttranslational modification of certain proteins, mostly required for blood coagulation. Within the cell, vitamin K undergoes electron reduction to a reduced form of vitamin K (called vitamin K hydroquinone) by the enzyme vitamin K epoxide reductase (or VKOR). Another enzyme then oxidizes vitamin K hydroquinone to allow carboxylation of glutamate into gamma-carboxyglutamate (Gla). This enzyme is called the gamma-glutamyl carboxylase or the vitamin K-dependent carboxylase. The carboxylation reaction will only proceed if the carboxylase enzyme is able to oxidize vitamin K hydroquinone into vitamin K epoxide at the same time; the carboxylation and epoxidation reactions are said to be coupled reactions. Vitamin K epoxide is then re-converted into vitamin K by the vitamin K epoxide reductase. These two enzymes comprise the so-called vitamin K cycle. One of the reasons why vitamin K is rarely deficient in a human diet is because vitamin K is continually recycled in our cells. Vitamin K 2,3-epoxide is the substrate for vitamin K 2,3-epoxide reductase (VKOR) complex. Significantly increased level of serum vitamin K epoxide has been found in patients with familial multiple coagulation factor deficiency (PMID: 12384421). Accumulation of vitamin K1-2,3-epoxide in plasma is also a sensitive marker of the coumarin-like activity of drugs (PMID: 2401753). Vitamin K1 2,3-epoxide is a vitamin K derivative. Vitamin K needed for the posttranslational modification of certain proteins, mostly required for blood coagulation. Within the cell, Vitamin K undergoes electron reduction to a reduced form of Vitamin K (called Vitamin K hydroquinone) by the enzyme Vitamin K epoxide reductase (or VKOR). Another enzyme then oxidizes Vitamin K hydroquinone to allow carboxylation of Glutamate to Gamma-cabroxygluatmate (Gla); this enzyme is called the gamma-glutamyl carboxylase or the Vitamin K-dependent carboxylase. The carboxylation reaction will only proceed if the carboxylase enzyme is able to oxidize Vitamin K hydroquinone to vitamin K epoxide at the same time; the carboxylation and epoxidation reactions are said to be coupled reactions. Vitamin K epoxide is then re-converted to Vitamin K by the Vitamin K epoxide reductase. These two enzymes comprise the so-called Vitamin K cycle. One of the reasons why Vitamin K is rarely deficient in a human diet is because Vitamin K is continually recycled in our cells. Vitamin K 2,3-epoxide is the substrate for vitamin K 2,3-epoxide reductase (VKOR) complex. Significantly increased level of serum vitamin K epoxide has been found in patients with familial multiple coagulation factor deficiency. (PMID 12384421) Accumulation of vitamin K1-2,3-epoxide in plasma is also a sensitive marker of coumarin-like activity of drugs. (PMID 2401753) [HMDB]
Vitamin K1
Phylloquinone is a member of the class of phylloquinones that consists of 1,4-naphthoquinone having methyl and phytyl groups at positions 2 and 3 respectively. The parent of the class of phylloquinones. It has a role as a cofactor, a plant metabolite and a human metabolite. It is a vitamin K and a member of phylloquinones. Vitamin K1, also called phylloquinone or phytonadione, is a fat soluble vitamin. Phylloquinone is a cofactor of the enzyme γ-carboxylase, which modifies and activates precursors to coagulation factors II, VII, IX, and X. It is indicated in the treatment of coagulation disorders due to faulty formation of coagulation factors II, VII, IX, and X caused by deficiency or interference in the activity of vitamin K. Phylloquinone has been synthesized since at least 1939, and was approved by the FDA prior to 1955. Vitamin K1 is a natural product found in Coffea arabica, Stachys annua, and other organisms with data available. Phytonadione is an analogue of the naphthoquinone vitamin K found in plants. The vitamins K are essential for blood coagulation as it is necessary for the hepatic synthesis of the coagulation factors II, VII, IX, and X; deficiency results in a bleeding diathesis. These vitamins are lipo-soluble; absorption via intestinal lymphatics requires the presence of bile salts. (NCI04) Phylloquinone is often called vitamin K1. It is a fat-soluble vitamin that is stable to air and moisture but decomposes in sunlight. It is found naturally in a wide variety of green plants. Phylloquinone is also an antidote for coumatetralyl. Vitamin K is needed for the posttranslational modification of certain proteins, mostly required for blood coagulation. A family of phylloquinones that contains a ring of 2-methyl-1,4-naphthoquinone and an isoprenoid side chain. Members of this group of vitamin K 1 have only one double bond on the proximal isoprene unit. Rich sources of vitamin K 1 include green plants, algae, and photosynthetic bacteria. Vitamin K1 has antihemorrhagic and prothrombogenic activity. See also: Broccoli (part of); Kale, cooked (part of); Cholecalciferol; phytonadione (component of) ... View More ... Vitamin K1, also known as phylloquinone or phytonadione, is a polycyclic aromatic ketone, based on 1,4-naphthoquinone, with 2-methyl and 3-phytyl substituents. Vitamin K is a family of phylloquinones that contain a ring of 2-methyl-1,4-naphthoquinone and an isoprenoid side chain. Several forms of vitamin K have been identified: vitamin K1 derived from plants, vitamin K2 (menaquinone) from bacteria and synthetic naphthoquinone provitamins, and vitamin K3 (menadione). Vitamin K1 has only one double bond on the proximal isoprene unit. Vitamin K1 possesses the same type and degree of activity as does naturally-occurring vitamin K, which is necessary for the production via the liver of active prothrombin (factor II), proconvertin (factor VII), plasma thromboplastin component (factor IX), and Stuart factor (factor X). Rich sources of vitamin K1 include green plants, algae, and photosynthetic bacteria. Vitamin K1 has antihemorrhagic and prothrombogenic activity. Vitamin K1 is a fat-soluble vitamin that is stable to air and moisture but decomposes in sunlight. Vitamin K1 is an antidote for coumatetralyl. A member of the class of phylloquinones that consists of 1,4-naphthoquinone having methyl and phytyl groups at positions 2 and 3 respectively. The parent of the class of phylloquinones. B - Blood and blood forming organs > B02 - Antihemorrhagics > B02B - Vitamin k and other hemostatics > B02BA - Vitamin k D006401 - Hematologic Agents > D003029 - Coagulants > D006490 - Hemostatics D050299 - Fibrin Modulating Agents > D000933 - Antifibrinolytic Agents D018977 - Micronutrients > D014815 - Vitamins Vitamin K1 a naturally occurring vitamin required for blood coagulation and bone and vascular metabolism. Vitamin K1 a naturally occurring vitamin required for blood coagulation and bone and vascular metabolism.