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The Relationship Between the Py3 Amino Acid in the Phosphopeptide Ligands and the Specificity for Various Sh2 Domains

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After consideration of the tertiary structure of the pY+3 binding pocket in SH2 domains, isoleucine of Ac-pYEEIE was replaced with various unnatural aliphatic amino acids and the binding affinities for Lck, Src, and Fyn SH2 domains were measured. We determined the characteristics of the amino acid at the pY+3 position in the phosphopeptide ligands for the specificity for the SH2 domains.
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Keywords: fyn; lck; ligand; phosphopeptide; sh2 domain; specificity; src

Document Type: Review Article

Affiliations: Department of Chemistry, Inha University, 253 Younghyong-Dong, Nam-Gu, Inchon-City 402-751, South Korea.

Publication date: 2004-12-01

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  • Protein & Peptide Letters publishes short papers in all important aspects of protein and peptide research, including structural studies, recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, drug design etc. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallisation, and preliminary structure determinations of biologically important proteins are acceptable. Purely theoretical papers are also acceptable provided they provide new insight into the principles of protein/peptide structure and function.
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