RESUMO
Protein kinase C (PKC) is a family of enzymes, which play important roles in intracellular signal transduction. We have designed novel PKC ligands having an isobenzofuranone template, based on the proposed interaction of DAG (1,2-diacyl-sn-glycerol) with the PKCdelta C1B ligand-binding domain. Several isobenzofuranone derivatives were synthesized and their PKCalpha binding activities were evaluated. The pivaloyl derivative 1f was found to be a strong PKCalpha ligand, and the structure-activity relationship is well explained by our proposed binding model.
Assuntos
Benzofuranos/farmacologia , Proteína Quinase C/antagonistas & inibidores , Benzofuranos/síntese química , Sítios de Ligação , Relação Dose-Resposta a Droga , Desenho de Fármacos , Inibidores Enzimáticos/síntese química , Inibidores Enzimáticos/farmacologia , Humanos , Ligação de Hidrogênio , Ligantes , Estrutura Molecular , Ligação Proteica , Proteína Quinase C/química , Relação Estrutura-AtividadeRESUMO
Protein kinase C (PKC) is a family of enzymes, which play important roles in intracellular signal transduction. To examine the distance between the two ligand binding sites (C1A and C1B) of PKC, we designed and synthesized two series of isobenzofuranone dimers. Peak binding activities were observed for the C3-acyl chain dimers having a C10-C12 linker and for the C7 dimers having a C14-C16.