Abstract

The contribution of the dendritic structure in catalysis of ester hydrolysis was investigated with a systematic peptide dendrimer series of increasing generation number (G1-G4) containing a catalytic consensus sequence His-Ser in all branches. A strong positive dendritic effect was observed with up to 100-fold increased histidine reactivity between G1 and G4. Kinetic studies and isothermal calorimetric titration experiments showed that the strong positive dendritic effect resulted from cooperativity between binding and catalysis.

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