A hetero-dimer model for concerted action of vitamin K carboxylase and vitamin K reductase in vitamin K cycle
نویسندگان
چکیده
منابع مشابه
The vitamin K-dependent carboxylase.
The only known biological function of Vitamin K (Fig. 1) in animals is as a required cofactor for the production of the unusual amino acid, -carboxyglutamate (Gla). This amino acid has a profound role in human blood coagulation. Several blood proteins require the presence of nine to thirteen Gla residues for normal function; these are the socalled Vitamin K-dependent (VKD) proteins. While some ...
متن کاملVitamin K-dependent carboxylation of the carboxylase.
Vitamin K-dependent (VKD) proteins require modification by the VKD-gamma-glutamyl carboxylase, an enzyme that converts clusters of glus to glas in a reaction that requires vitamin K hydroquinone, for their activity. We have discovered that the carboxylase also carboxylates itself in a reaction dependent on vitamin K. When pure human recombinant carboxylase was incubated in vitro with 14CO2 and ...
متن کاملA case report of temporary and acquired vitamin K-dependent clotting factor deficiency without any response to administrated vitamin K
Abstract Background and Objectives Vitamin K-dependent clotting factor deficiency (VKCFD) is usually an acquired problem due to liver disease, malabsorption, and overdose of warfarin. In the present paper the significance and role of vitamin K-dependent coagulation factors in menorrhagia were evaluated. Case We present a rare case of 43 year woman with acquired vitamin K deficiency and se...
متن کامل[Vitamin K].
In this paper, highly sensitive methods for measuring of vitamin K in serum, feces and milk are described. Vitamin K1 and the menaquinone family from the serum, feces and milk were separated by high performance liquid chromatography. The separated K1 and menaquinone families were detected by a fluorescence spectrophotometer after their reduction with sodium borohydride or platinum catalyst colu...
متن کاملVitamin K
Vitamin K ................................................................................................................................... 1 1 Dietary sources and intake ..................................................................................................... 1 2 Physiology and metabolism ...............................................................................................
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ژورنال
عنوان ژورنال: Journal of Theoretical Biology
سال: 2011
ISSN: 0022-5193
DOI: 10.1016/j.jtbi.2011.03.030