The present invention provides a stable cell line overexpressing a recombinant vitamin K-dependent (VKD) protein and both a recombinant vitamin K epoxide reductase (VKOR) and a recombinant vitamin K dependent gamma carboxylase (VKGC), wherein the amount of fully carboxylated VKD protein produced in the cell is increased 10% as compared to the amount of fully carboxylated VKD protein produced in the cell in the absence of the recombinant VKOR and the recombinant VKGC.

The present invention relates to methods and compositions for improving the productivity of recombinant vitamin K dependent protein expression in host cells.

The invention relates to commercially viable methods for producing biologically active vitamin R dependent proteins, particularly Factor IX. Factor IX is produced at a level of at least about 15 mg/L and is at least 25% biologically active. The method relies upon co-expression of one or more of paired basic amino acid converting enzyme (PACE), vitamin K dependent epoxide reductase (VKOR) and vitamin K dependent -glutamyl carboxylase (VKGC) at a preferred ratio so that the vitamin K dependent protein is efficiently produced and processed by a recombinant cell.

The present invention provides a stable cell line overexpressing a recombinant vitamin K-dependent (VKD) protein and both a recombinant vitamin K epoxide reductase (VKOR) and a recombinant vitamin K dependent gamma carboxylase (VKGC), wherein the amount of fully carboxylated VKD protein produced in the cell is increased 10% as compared to the amount of fully carboxylated VKD protein produced in the cell in the absence of the recombinant VKOR and the recombinant VKGC.

The present invention relates to methods and compositions for improving the productivity of recombinant vitamin K dependent protein expression in host cells.

The present invention provides a stable cell line overexpressing a recombinant vitamin K-dependent (VKD) protein and both a recombinant vitamin K epoxide reductase (VKOR) and a recombinant vitamin K dependent gamma carboxylase (VKGC), wherein the amount of fully carboxylated VKD protein produced in the cell is increased 10% as compared to the amount of fully carboxylated VKD protein produced in the cell in the absence of the recombinant VKOR and the recombinant VKGC.

The present invention relates to methods and compositions for improving the productivity of recombinant vitamin K dependent protein expression in host cells.

The invention relates to commercially viable methods for producing biologically active vitamin K dependent proteins, particularly Factor IX. Factor IX is produced at a level of at least about 15 mg/L and is at least 25% biologically active. The method relies upon co-expression of one or more of paired basic amino acid converting enzyme (PACE), vitamin K dependent epoxide reductase (VKOR) and vitamin K dependent -glutamyl carboxylase (VKGC) at a preferred ratio so that the vitamin K dependent protein is efficiently produced and processed by a recombinant cell.