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• W2344284775 endingPage "e1004893" @default.
• W2344284775 startingPage "e1004893" @default.
• W2344284775 abstract "Intra-protein information is transmitted over distances via allosteric processes. This ubiquitous protein process allows for protein function changes due to ligand binding events. Understanding protein allostery is essential to understanding protein functions. In this study, allostery in the second PDZ domain (PDZ2) in the human PTP1E protein is examined as model system to advance a recently developed rigid residue scan method combining with configurational entropy calculation and principal component analysis. The contributions from individual residues to whole-protein dynamics and allostery were systematically assessed via rigid body simulations of both unbound and ligand-bound states of the protein. The entropic contributions of individual residues to whole-protein dynamics were evaluated based on covariance-based correlation analysis of all simulations. The changes of overall protein entropy when individual residues being held rigid support that the rigidity/flexibility equilibrium in protein structure is governed by the La Châtelier's principle of chemical equilibrium. Key residues of PDZ2 allostery were identified with good agreement with NMR studies of the same protein bound to the same peptide. On the other hand, the change of entropic contribution from each residue upon perturbation revealed intrinsic differences among all the residues. The quasi-harmonic and principal component analyses of simulations without rigid residue perturbation showed a coherent allosteric mode from unbound and bound states, respectively. The projection of simulations with rigid residue perturbation onto coherent allosteric modes demonstrated the intrinsic shifting of ensemble distributions supporting the population-shift theory of protein allostery. Overall, the study presented here provides a robust and systematic approach to estimate the contribution of individual residue internal motion to overall protein dynamics and allostery." @default.
• W2344284775 created "2016-06-24" @default.
• W2344284775 creator A5010373442 @default.
• W2344284775 creator A5081800735 @default.
• W2344284775 creator A5085516115 @default.
• W2344284775 creator A5090183148 @default.
• W2344284775 date "2016-04-26" @default.
• W2344284775 modified "2023-10-10" @default.
• W2344284775 title "Rigid Residue Scan Simulations Systematically Reveal Residue Entropic Roles in Protein Allostery" @default.
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