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Uncertainties of Predictions from Temperature Replica Exchange Simulations - MaRDI portal

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Uncertainties of Predictions from Temperature Replica Exchange Simulations

From MaRDI portal



DOI10.5281/zenodo.10940013Zenodo10940013MaRDI QIDQ6684300

Dataset published at Zenodo repository.

Author name not available (Why is that?)

Publication date: 8 April 2024

Copyright license: No records found.



Description

Parallel tempering molecular dynamics simulation, also known as temperature replica exchange simulation, is a popular enhanced sampling method used to study biomolecular systems. This method makes it possible to calculate the free energy differences between states of the system for a series of temperatures. We developed a method to easily calculate errors (standard errors or confidence intervals) of these predictions using a modified version of our recently introduced JumpCount method. The number of transitions between states (e.g. protein folding events) is counted for each temperature. This number of transitions, together with the temperature, fully determines the value of standard error or the confidence interval of the free energy difference. We also address the issue of convergence in the situation where all replicas start from one state by developing an estimator of the equilibrium constant from simulations that are not fully equilibrated. The prerequisite of the method is the Markovianity of the process studied.






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