Dynamics govern specificity of a protein-protein interface: Substrate recognition by thrombin

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Abstract

Biomolecular recognition is crucial in cellular signal transduction. Signaling is mediated through molecular interactions at protein-protein interfaces. Still, specificity and promiscuity of protein-protein interfaces cannot be explained using simplistic static binding models. Our study rationalizes specificity of the prototypic protein-protein interface between thrombin and its peptide substrates relying solely on binding site dynamics derived from molecular dynamics simulations. We find conformational selection and thus dynamic contributions to be a key player in biomolecular recognition. Arising entropic contributions complement chemical intuition primarily reflecting enthalpic interaction patterns. The paradigm "dynamics govern specificity" might provide direct guidance for the identification of specific anchor points in biomolecular recognition processes and structure-based drug design.

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Fuchs, J. E., Huber, R. G., Waldner, B. J., Kahler, U., Von Grafenstein, S., Kramer, C., & Liedl, K. R. (2015). Dynamics govern specificity of a protein-protein interface: Substrate recognition by thrombin. PLoS ONE, 10(10). https://doi.org/10.1371/journal.pone.0140713

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