Recombinant protein c and protein s variants

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 15/12 (2006.01) A61K 38/36 (2006.01) C07K 14/745 (2006.01) C12N 9/64 (2006.01) G01N 33/86 (2006.01) A61K 38/00 (2006.01)

Patent

CA 2283934

The present invention is concerned with a variant blood coagulation component, which is substantially homologous in amino acid sequence to wild-type blood coagulation component capable of expressing anticoagulant activity in the protein C-anticoagulant system of blood and selected from protein C (PC), activated protein C (APC) and protein S (PS), said variant component being capable of expressing an anticoagulant activity, which is enhanced in comparison with the anticoagulant activity expressed by the corresponding wild- type blood coagulation component, and said variant component differing from the respective wild-type component, in that it contains in comparison with the said wild-type component at least one amino acid residue modification in its amino acid residue sequence. The present invention is also concerned with methods to produce such variants based on DNA technology, DNA segments intended for use in the said methods, and the use of the said variants for therapeutic and diagnostic purposes.

L'invention concerne un constituant variant de coagulation sanguine qui est sensiblement homologue, dans sa séquence d'acides aminés, à un constituant de coagulation sanguine de type sauvage qui est capable d'exprimer une activité d'anticoagulation dans le système d'anticoagulation sanguine par la protéine C et qui est sélectionné dans la protéine C (PC), la protéine C activée (APC) et la protéine S (PS). Le constituant variant est capable d'exprimer une activité d'anticoagulation qui est améliorée par rapport à celle exprimée par le constituant de coagulation sanguine de type sauvage correspondant. Ledit constituant variant diffère du constituant de type sauvage respectif en ce qu'il contient, par rapport au constituant de type sauvage, au moins une modification des résidus d'acides aminés dans sa séquence de résidus d'acides aminés. La présente invention concerne également des procédés permettant de produire de tels variants avec la technologie ADN, les segment ADN destinés à être utilisés dans lesdits procédés, et l'utilisation de tels variants à des fins de thérapie et de diagnostic.

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