Design and Synthesis of 4-(α-Hydroxymalonyl)phenylalanine as a New Phosphotyrosyl Mimetic and Its Use in Growth Factor Receptor Bound 2 Src-Homology 2 (Grb2 SH2) Domain-Binding Peptides
摘要:
A new phosphotyrosyl mimetic 4-(alpha-hydroxymalonyl)phenylalanine and its incorporation into a Grb2 SH2 domain-binding tripeptide are presented. In whole-cell studies using malonyl ethyl ester prodrug derivatives, it was observed that the 4-(alpha-hydroxymalonyl)phenylalanyl-containing peptide exhibited greater efficacy than the nonhydroxylated 4-(malonyl)phenylalanyl-containing congener in blocking the association of Grb2 with activated erbB-2 tyrosine kinase. These results are consistent with de-esterification and at least partial intracellular decarboxylation.