TY - JOUR
T1 - Conformationally constrained peptide analogues of pTyr-Glu-Glu-Ile as inhibitors of the Src SH2 domain binding
AU - Nam, Nguyen Hai
AU - Ye, Guofeng
AU - Sun, Gongqin
AU - Parang, Keykavous
PY - 2004/6/3
Y1 - 2004/6/3
N2 - A series of conformationally constrained peptides were designed and synthesized as the Src SH2 domain ligands based on a tetrapeptide sequence pTyr-Glu-Glu-Ile (pYEEI). In general, the constrained peptides such as compounds 6, 7, and 11 (IC50 = 1.1-1.5 μM) showed higher binding affinities to the Src SH2 domain relative to the corresponding linear peptides 8a, 9a, and 13a, respectively (IC50 > 100 μM), and PYEEI (IC50 = 6.5 μM), as evaluated by a fluorescence polarization assay. Molecular modeling studies revealed that in constrained peptides, the isoleucine side chain penetrates very deeply into the hydrophobic binding pocket (P + 3 site) of the Src SH2 domain. These constrained peptides can serve as novel templates for the design of small and nonpeptidic inhibitors of the Src SH2 domain.
AB - A series of conformationally constrained peptides were designed and synthesized as the Src SH2 domain ligands based on a tetrapeptide sequence pTyr-Glu-Glu-Ile (pYEEI). In general, the constrained peptides such as compounds 6, 7, and 11 (IC50 = 1.1-1.5 μM) showed higher binding affinities to the Src SH2 domain relative to the corresponding linear peptides 8a, 9a, and 13a, respectively (IC50 > 100 μM), and PYEEI (IC50 = 6.5 μM), as evaluated by a fluorescence polarization assay. Molecular modeling studies revealed that in constrained peptides, the isoleucine side chain penetrates very deeply into the hydrophobic binding pocket (P + 3 site) of the Src SH2 domain. These constrained peptides can serve as novel templates for the design of small and nonpeptidic inhibitors of the Src SH2 domain.
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U2 - 10.1021/jm040008+
DO - 10.1021/jm040008+
M3 - Article
C2 - 15163193
AN - SCOPUS:2542528563
SN - 0022-2623
VL - 47
SP - 3131
EP - 3141
JO - Journal of Medicinal Chemistry
JF - Journal of Medicinal Chemistry
IS - 12
ER -