Von willebrand factor (vwf)-cleaving protease

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 15/57 (2006.01) A61K 31/711 (2006.01) A61K 38/46 (2006.01) A61K 45/00 (2006.01) A61K 48/00 (2006.01) A61P 7/02 (2006.01) A61P 43/00 (2006.01) C12N 1/15 (2006.01) C12N 1/19 (2006.01) C12N 1/21 (2006.01) C12N 9/50 (2006.01) C12N 9/64 (2006.01) C12N 15/00 (2006.01) C12P 21/00 (2006.01) G01N 33/15 (2006.01) G01N 33/50 (2006.01) G01N 33/573 (2006.01) A61K 38/00 (2006.01)

Patent

CA 2445421

It is intended to isolate and identify a vWF-specific cleaving enzyme. A vWF- specific cleaving enzyme being capable of the 842Tyr-843Met bond of vWF and comprising as a partial sequence a polypeptide chain Leu-Leu-Val-Ala-Val preferably typified by a polypeptide chain which has a part of the N-terminal amino acid sequence of a matured protein Ala-Ala-Gly-Gly-Ile-Leu-His-Leu-Glu- Leu-Leu-Val-Ala-Val and shows a molecular weight of from 105 to 160 kDa in SDS- PAGE under reducing or non-reducing conditions as an embodiment mode. Isolation and identification of this vWF-specific cleaving enzyme contribute to the possibility of supplementary therapy for diseases caused by the lack of the above enzyme such as thrombotic thrombocytopenic purpura.

La présente invention concerne l'isolation ainsi que l'identification d'une enzyme de clivage propre au facteur de Von Willebrand (vWF). Dans un mode de réalisation, cette invention concerne une enzyme de clivage propre au facteur vWF pouvant effectuer la liaison 842Tyr-843Met du facteur vWF et comprenant, comme séquence partielle, une chaîne polypeptide Leu-Leu-Val-Ala-Val caractérisée de préférence par une chaîne polypeptide qui comporte une partie de la séquence d'acide aminé N-terminal d'une protéine mûre Ala-Ala-Gly-Gly-Ile-Leu-His-Leu-Glu-Leu-Leu-Val-Ala-Val et qui présente un poids moléculaire compris entre 105 et 160 kDa dans une PAGE en présence de SDS dans des conditions de réduction ou de non réduction. L'isolation et l'identification de cette enzyme de clivage propre au facteur vWF contribuent à la génération d'une nouvelle thérapie visant à traiter des maladies, telle que la purpura thrombopénique thrombotique, provoquées par l'absence de ladite enzyme.

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