The remarkable catalytic proficiency of enzymes is ascribed to a combination of effects, including contribution from the active site medium. We aim to describe, quantify and exploit medium effects for catalysis in artificial enzyme mimics. In past work the Hollfelder group used polyethylene imines (PEIs) with modified surfaces to bring about efficient catalysis with rate accelerations per site up to 10e6 for a proton transfer reaction, thus creating active microenvironments.
We will use a combination of high-throughput synthesis and high-throughput assays to identify successful catalysts from diverse libraries, containing PEIs with pendant hydrophobic, positive and negative groups, possibly coordinated to metal ion cofactors. Of particular interest will be the catalysis of phosphate transfer, for which we want to quantify the potential of medium effects. Our ultimate focus will be on kinetic analysis the catalytic solutions identified in structure-activity relationships for our combinatorial libraries.
Fields of science
Call for proposal
See other projects for this call