Ecotine derivatives

C - Chemistry – Metallurgy – 12 – P

Patent

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Details

C12P 21/06 (2006.01) C07K 14/81 (2006.01) C12Q 1/37 (2006.01)

Patent

CA 2369027

This invention provides a class binding proteins that specifically bind to and modulate (e.g. enhance) the activity of polypeptides having a chymotrypsin fold (e.g. serine proteases). The binding proteins are based on the structure of ecotin. It was discovered that modification of the amino or carboxyl terminus and/or randomization of one or more of loops 50s, 60s, 80s or 100s will provide an ecotin variant library from which can be selected binding molecules (e.g. protease modulators) specific to virtually any serine protease. Depending on the ecotin variant and the target serine protease, the modulator can act as a serine protease inhibitor or as a serine protease activator. Specific agonists (enhancers) of Factor IXa are disclosed.

L'invention concerne une classe de protéines de liaison qui se lient spécifiquement aux polypeptides comprenant un enroulement de chymotrypsine (p. ex. protéase à sérine) et modulent (p. ex. renforcent) l'activité de ceux-ci. Ces protéines de liaison reposent sur une structure écotine. On a découvert que la modification du terminus amino ou carboxyle et/ou la randomisation d'une ou plusieurs boucles sélectionnées dans les boucles 50, 60, 80 ou 100 permet d'obtenir une banque de mutants d'écotine à partir de laquelle des molécules de liaison (p. ex. modulateurs de protéase) spécifiques de pratiquement n'importe quelle protéase à sérine peuvent être sélectionnées. Selon le mutant d'écotine et la protéase à sérine cible, le modulateur peut avoir une action d'inhibiteur de protéase à sérine ou d'activateur de protéase à sérine. L'invention concerne également des agonistes (renforcateurs-facilitateurs) du facteur IX.

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