Dep-1 receptor protein tyrosine phosphatase interacting...

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 15/55 (2006.01) A61K 38/46 (2006.01) A61K 45/00 (2006.01) C07K 14/47 (2006.01) C07K 14/705 (2006.01) C12N 9/14 (2006.01) C12Q 1/42 (2006.01) G01N 33/573 (2006.01)

Patent

CA 2503736

Proteins are identified from human breast tumor cell lines (MDA-MB-231, T-47D and T-47D/Met) that interact specifically with the substrate-trapping mutant form of Density Enhanced Phosphatase-1 (DEP-1). These proteins include the functional component p120 catenin (p120ctn), the adaptor protein Gab 1, and the HGF/SF receptor Met. The invention relates to isolated complexes comprising DEP-1 polypeptides in specific association with Met, Gab 1, or p120ctn, identified herein as DEP-1 substrate polypeptides. Screening assays for agents that alter DEP-1 interaction with DEP-1 substrate polypeptides are also disclosed, as are methods for altering biological signals in cells that are transduced via DEP-1 pathways.

L'invention concerne l'identification de protéines à partir des lignées cellulaires humaines d'une tumeur du sein (MDA-MB-231, T-47D et T-47D/Met) interagissant de manière spécifique avec la forme mutante de piège à substrat de la Phosphatase-1 à densité améliorée (DEP-1). Ces protéines comprennent le composant fonctionnel p120 caténine (p120ctn), la protéine adaptatrice Gab 1 et le récepteur Met de HGF/SF. L'invention concerne également des complexes isolés comprenant des polypeptides de la DEP-1 associés de manière spécifique à Met, Gab 1 ou p120ctn, identifiés ici comme polypeptides du substrat de la DEP-1. L'invention concerne enfin des dosages de criblage destinés à des agents modifiant l'interaction de la DEP-1 avec les polypeptides du substrat de la DEP-1, ainsi que des procédés permettant de modifier des signaux biologiques dans des cellules transduites par l'intermédiaire des voies de la DEP-1.

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