Dr. Lim, Carmay 林小喬 博士

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Sensitivity of Functional Loop Conformations on Long-Range Electrostatics: Implications for M20 Loop Dynamics in E. coli Dihydrofolate Reductase

Journal of Chemical Theory and Computation, Mar 19, 2020

In E. coli dihydrofolate reductase, unusual conformational motions of a functional M20 loop that interacts with substrate and coenzyme have been construed as evidence for dynamical effects in enzyme catalysis. By computing this loop’s conformational free energies in the apoenzyme, we show that it is sensitive to the treatment of long-range electrostatic interactions and the solvation box size in modeling/simulations. These results provide important guidelines for computing reaction/binding free energy profiles of proteins with functional loops.

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