Cited by 125Protein Structure and DynamicsAdvanced Physical and Chemical Molecular InteractionsComputational Drug Discovery Methods

Intrinsic map dynamics exploration for uncharted effective free-energy landscapes

Open access
Chiavazzo, Eliodoro, Covino, Roberto, Coifman, Ronald R., Gear, C. William, Georgiou, Anastasia S., Hummer, Gerhard, Kevrekidis, Ioannis G.·2017·Proceedings of the National Academy of Sciences

Abstract

Significance: Direct simulations explore the dynamics of physical systems at their natural pace. Molecular dynamics (MD) simulations (e.g., of macromolecular folding) extensively revisit typical configurations until rare and interesting transition events occur. Biasing the simulator away from regions already explored can, therefore, drastically accelerate the discovery of features. We propose an enhanced sampling simulation framework, where MD and machine learning adaptively bootstrap each other. Machine learning guides the search for important configurations by processing information from previous explorations. This search proceeds iteratively in an algorithmically orchestrated fashion without advance knowledge of suitable collective variables. Applied to a molecular sensor of lipid saturation in membranes, a helix dissociation pathway not seen in millisecond simulations is discovered at the second iteration.

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Crossref · 10.1073/pnas.1621481114

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  • The challenge of identifying the most appropriate low-dimensional space to accelerate conformational sampling is reflected in the fact that most early (and recent) applications of dimensionality reduction to atomistic modeling involved simulations of rare events or phase transitions.

    “The challenge of identifying the most appropriate low-dimensional space to accelerate conformational sampling is reflected in the fact that most of early (and recent) applications of dimensionality reduction to atomistic modeling involved simulations of rare events or phase transitions 71,72,95-98 .”

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Authors
Chiavazzo, E., Covino, R., Coifman, R. R., Gear, C. W., Georgiou, A. S., Hummer, G., & Kevrekidis, I. G.
Affiliations
  • Goethe University Frankfurt (DE)
  • Politecnico di Torino (IT)
Venue
Proceedings of the National Academy of Sciences
Published
2017-06-20
Volume
114
Issue
28
Pages
E5494-E5503
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2571642833
Cited by
125
References
73
Citations by year
2026: 2 · 2025: 10 · 2024: 5 · 2023: 17 · 2022: 14 · 2021: 11 · 2020: 23 · 2019: 18 · 2018: 16 · 2017: 9
FWCI
7.37
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • PORTO@Iris (submittedVersion, other-oa)
  • PORTO Publications Open Repository TOrino (Politecnico di Torino) (submittedVersion, other-oa)
  • Max Planck Digital Library (submittedVersion)
  • MPG.PuRe (Max Planck Society) (submittedVersion)
Funders
Ministero dell’Istruzione, dell’Università e della Ricerca (2012LHPSJC)
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
  • Physical Sciences › Computer Science › Computational Theory and Mathematics › Computational Drug Discovery Methods
Keywords
enhanced sampling, free energy landscape, machine learning, molecular dynamics, adaptive biasing, collective variables, lipid saturation

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