Light-emitting fusion proteins and diagnostic and...

C - Chemistry – Metallurgy – 07 – K

Patent

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Details

C07K 19/00 (2006.01) A61K 38/02 (2006.01) A61K 38/44 (2006.01) A61K 49/00 (2006.01) C12Q 1/00 (2006.01) C12Q 1/02 (2006.01) C12Q 1/25 (2006.01) C12Q 1/26 (2006.01) G01N 33/50 (2006.01) G01N 33/542 (2006.01) G01N 33/573 (2006.01) G01N 33/574 (2006.01)

Patent

CA 2441673

Light-generating fusion proteins having a ligand binding site and a light- generating polypeptide moiety and their use as diagnostics, in drug screening and discovery, and as therapeutics, are disclosed. The light-generating fusion protein has a feature where the bioluminescence of the polypeptide moiety changes upon binding of a ligand at the ligand binding site. The ligand may be, for example, an enzyme present in an environment only under certain conditions, e.g., ubiquitin ligase in a hypoxic state, such that the light- generating fusion protein is "turned on" only under such conditions.

L'invention concerne des protéines de fusion à génération lumineuse possédant un site de liaison de ligand et une fraction polypeptidique à génération lumineuse, ainsi que l'utilisation de celles-ci comme agents diagnostiques, dans le dépistage systématique des drogues, et comme agents thérapeutiques. La protéine de fusion à génération lumineuse présente une caractéristique: la bioluminescence de la fraction polypeptidique change au moment de la liaison d'un ligand au niveau du site de liaison de ligand. Le ligand peut être, par exemple, une enzyme présente dans un milieu seulement dans certaines conditions, par exemple l'ubiquitine ligase dans un état hypoxique, de manière que la protéine de fusion à génération lumineuse soit <= excitée >= seulement dans de telles conditions.

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