Isolation and use of nch-sh3 binding peptides

Details Isolation and use of nch-sh3 binding peptides Isolation and use of nch-sh3 binding peptides

C - Chemistry, Metallurgy

07

K

C07K 7/08 (2006.01) C07K 7/06 (2006.01) C40B 30/04 (2006.01) G01N 33/53 (2006.01) C12N 9/12 (2006.01)

Patent

CA 2595040

Peptides having general and specific binding affinities for the Src homology region 3 (SH3) domains of proteins are disclosed in the present invention. In particular, SH3 binding peptides have been isolated from phage-displayed random peptide libraries which had been screened for isolates that bind to bacterial fusion proteins comprising SH3 and glutathione S-transferase (GST). Preferred peptides are disclosed which comprise a core 7-mer sequence (preferably, a consensus motif) and two or more, preferably at least six, additional amino acid residues flanking the core sequence, for a total length of 9, preferably at least 13, amino acid residues and no more than about 45 amino acid residues. Such peptides manifest preferential binding affinities for certain SH3 domains. The preferred peptides exhibit specific binding affinities for the Src-family of proteins. In vitro and in vivo results are presented which demonstrate the biochemical activity of such peptides.

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