Vitamin K-dependent clotting factor synthesis

Vitamin K-dependent clotting factor synthesis is a critical biochemical process wherein specific proteins involved in blood coagulation (Factors II/prothrombin, VII, IX, X, as well as Protein C, Protein S, and Protein Z) undergo a post-translational modification—gamma-carboxylation of glutamate residues—to become biologically active. This modification, catalyzed by gamma-glutamyl carboxylase in the liver, depends on vitamin K as a cofactor and is essential for the factors' ability to bind calcium and participate effectively in the coagulation cascade. Deficiency or inhibition of this process leads to under-carboxylated, inactive clotting factors and bleeding diathesis, while clinical control of this process underlies the mechanism of warfarin and related anticoagulants. This synthesis is a process, not a single druggable protein target, but the proteins it produces are targets for anticoagulant therapy and monitoring in clinical practice.

Other names

Synthesis of vitamin K-dependent coagulation factorsGamma-carboxylation of clotting factors

Inhibition of vitamin K recycling (warfarin): prevents gamma-carboxylation, producing biologically inactive factors; Supplementation with vitamin K: restores carboxylation, restores clotting function.