Scaffold

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C - Chemistry, Metallurgy

07

K

C07K 14/81 (2006.01) A61K 38/08 (2006.01) A61K 38/16 (2006.01) A61P 31/10 (2006.01) C07K 7/06 (2006.01) C07K 14/47 (2006.01) C07K 19/00 (2006.01) C12N 15/10 (2006.01) C12N 15/12 (2006.01) C12N 15/62 (2006.01) G01N 33/53 (2006.01)

Patent

CA 2610976

The present invention relates to the use of Stefin A as a scaffold protein for the display of inserted peptides, particularly wherein the Stefin A is a human Stefin A. Several mutations are advantageously made in the wild type stefin A sequence to improve it as a scaffold; preferably the Stefin A comprises a heterologous peptide insertion at the Leu 73 site. Furthermore, preferably the scaffold protein comprises a V48D mutation; preferably the scaffold protein comprises a G4W mutation. Preferably the scaffold comprises Leu73, V48D and G4W mutations. The invention also relates to the scaffold proteins themselves, in particular a stefin A polypeptide having the Leu73, V48D and G4W mutations, such as shown as SEQ ID NO: 1. The invention also relates to a method for identifying binding proteins and to peptide A (RLNKPLPSLPV) and its use in treating yeast infections.

L'invention concerne l'utilisation de la stéfine A comme protéine d'échafaudage aux fins d'affichage de peptides introduits, spécialement quand la stéfine A est une stéfine A humaine. Plusieurs mutations sont conçues dans la séquences de la stéfine A de type sauvage, afin de l'améliorer en échafaudage; de préférence, la stéfine A comprend une introduction de peptide hétérologue au niveau du site Leu73. De plus, la protéine d'échafaudage comprend, de préférence, une mutation V48D; de préférence, la protéine d'échafaudage comprend une mutation G4W. De préférence, l'échafaudage comprend des mutations Leu73, V48D et G4W. L'invention concerne également les protéines d'échafaudage, notamment le polypeptide de la stéfine A possédant les mutations Leu73, V48D et G4W, telles que présentées sous SEQ ID NO: 1. L'invention concerne enfin un procédé permettant d'identifier des protéines de liaison et un peptide A (RLNKPLPSLPV) et l'utilisation de celui-ci dans le traitement des infections aux levures.

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