Coarse master equations for peptide folding dynamics
Abstract
We construct coarse master equations for peptide folding dynamics from atomistic molecular dynamics simulations. A maximum-likelihood propagator-based method allows us to extract accurate rates for the transitions between the different conformational states of the small helix-forming peptide Ala5. Assigning the conformational states by using transition paths instead of instantaneous molecular coordinates suppresses the effects of fast non-Markovian dynamics. The resulting master equations are validated by comparing their analytical correlation functions with those obtained directly from the molecular dynamics simulations. We find that the master equations properly capture the character and relaxation times of the entire spectrum of conformational relaxation processes. By using the eigenvectors of the transition rate matrix, we are able to systematically coarse-grain the system. We find that a two-state description, with a folded and an unfolded state, roughly captures the slow conformational dynamics. A four-state model, with two folded and two unfolded states, accurately recovers the three slowest relaxation process with time scales between 1.5 and 7 ns. The master equation models not only give access to the slow conformational dynamics but also shed light on the molecular mechanisms of the helix-coil transition.
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The core-based projection method was first introduced for MSM construction in [22].
“An alternative approach is the core-based projection method, long familiar to the transition path sampling community but first introduced for MSM construction in [22].”
From Markov state models of biomolecular conformational dynamics (2014) · cites this paper as [22]
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EMMA: A Software Package for Markov Model Building and Analysis
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Estimation and uncertainty of reversible Markov models
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Free Energies from Dynamic Weighted Histogram Analysis Using Unbiased Markov State Model
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Self-citationOvchinnikov, V., Karplus, M., & Vanden‐Eijnden, E. (2011) · The Journal of Chemical Physics · doi:10.1063/1.3544209 · Cited by 131 · see citing works
Comparing geometric and kinetic cluster algorithms for molecular simulation data
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A theoretical view of protein dynamics
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Thermostat Artifacts in Replica Exchange Molecular Dynamics Simulations
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Self-citationMarkov State Models to Study the Functional Dynamics of Proteins in the Wake of Machine Learning
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Molecular origins of internal friction effects on protein-folding rates
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The Free Energy Landscape of Small Molecule Unbinding
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Contact- and distance-based principal component analysis of protein dynamics
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Kinetic characterization of the critical step in HIV-1 protease maturation
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Error and efficiency of replica exchange molecular dynamics simulations
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Optimal Dimensionality Reduction of Multistate Kinetic and Markov-State Models
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Self-citationArtificial Intelligence Enhanced Molecular Simulations
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Perspective: Markov models for long-timescale biomolecular dynamics
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Exact rate calculations by trajectory parallelization and tilting
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Markov Models of Molecular Kinetics
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Diffusion models of protein folding
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Self-citationDynamic properties of force fields
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Kinetics from Replica Exchange Molecular Dynamics Simulations
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Self-citationMultiscale Simulation Reveals Multiple Pathways for H2 and O2 Transport in a [NiFe]-Hydrogenase
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Uncertainty quantification for quantum chemical models of complex reaction networks
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Disordered RNA chaperones can enhance nucleic acid folding via local charge screening
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Mechanisms of protein–ligand association and its modulation by protein mutations
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Protein storytelling through physics
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Robust Density-Based Clustering To Identify Metastable Conformational States of Proteins
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Identifying metastable states of folding proteins
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Committors, first-passage times, fluxes, Markov states, milestones, and all that
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Machine Learning of Biomolecular Reaction Coordinates
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- Authors
- Buchete, N.-V., & Hummer, G.
- Affiliations
- National Institutes of Health (US)
- Corresponding author
- Hummer, Gerhard
- Venue
- The Journal of Physical Chemistry B
- Publisher
- American Chemical Society (ACS)
- Published
- 2008-01-31
- Volume
- 112
- Issue
- 19
- Pages
- 6057-6069
- ISSN
- 1520-5207 (ISSN-L)
- 1520-6106
- OpenAlex
- W2025899185
- Cited by
- 477
- References
- 65
- Citations by year
- 2026: 8 · 2025: 17 · 2024: 14 · 2023: 20 · 2022: 23 · 2021: 23 · 2020: 30 · 2019: 34 · 2018: 35 · 2017: 32 · 2016: 37 · 2015: 31 · 2014: 26 · 2013: 34 · 2012: 31
- FWCI
- 11.02
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- The Journal of Physical Chemistry B (publishedVersion)
- PubMed (publishedVersion)
- MPG.PuRe (Max Planck Society) (submittedVersion)
- Funders
- National Institutes of Health
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
- Physical Sciences › Chemistry › Physical and Theoretical Chemistry › Advanced Physical and Chemical Molecular Interactions
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA and protein synthesis mechanisms
- Keywords
- helix-coil transition, conformational relaxation, transition rate matrix, transition pathways, non-Markovian dynamics, two-state model, four-state model, relaxation time, correlation functions
- MeSH terms
- Computer Simulation, Models, Molecular, Peptides, Temperature, Time Factors, Protein Structure, Tertiary, Protein Folding
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