Prediction of Stable Mutants, Unfolding Curves, Stability Maps and Protein Electrostatic Frustration
pStab web server provides a robust and fast strategy to engineer protein stabilities through mutations involving charged residues. Mutants are generated by iteratively shuffling the charges around in the native structure whilst the stabilizing and de-stabilizing mutations are identified from their Debye-Hückel interaction energies. A structure-based statistical mechanical model (the Wako-Saitô-Muñoz-Eaton model) is then employed to predict the unfolding curves (and hence the changes in stabilities) for selected mutants as a function of temperature. We expect the method to be of importance as a first and rapid step to screen for protein mutants with specific stability in the biotechnology industry, in the construction of stability maps at the residue level (i.e., hot spots), and as a robust tool to probe for mutations that enhance the stability of protein-based drugs. At a more fundamental level, pStab provides a simple avenue to explore the role of electrostatic frustration in proteins.
1. Gopi, S., Devanshu, D., Krishna, P., & Naganathan, A. N. pStab: Prediction of Stable Mutants, Unfolding Curves, Stability Maps and Protein Electrostatic Frustration. Bioinformatics., 2018, 34, 875-877.
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Protein Biophysics Lab