Cited by 115Cardiomyopathy and Myosin StudiesAdvanced Thermodynamics and Statistical Mechanicsstochastic dynamics and bifurcation

From Single Molecule Fluctuations to Muscle Contraction: A Brownian Model of A.F. Huxley's Hypotheses

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Marcucci, Lorenzo, Yanagida, Toshio·2012·PLoS ONE

Abstract

Muscular force generation in response to external stimuli is the result of thermally fluctuating, cyclical interactions between myosin and actin, which together form the actomyosin complex. Normally, these fluctuations are modelled using transition rate functions that are based on muscle fiber behaviour, in a phenomenological fashion. However, such a basis reduces the predictive power of these models. As an alternative, we propose a model which uses direct single molecule observations of actomyosin fluctuations reported in the literature. We precisely estimate the actomyosin potential bias and use diffusion theory to obtain a brownian ratchet model that reproduces the complete cross-bridge cycle. The model is validated by simulating several macroscopic experimental conditions, while its interpretation is compatible with two different force-generating scenarios.

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Authors
Marcucci, L., & Yanagida, T.
Affiliations
  • The University of Osaka (JP)
  • RIKEN (JP)
Corresponding author
Marcucci, Lorenzo
Venue
PLoS ONE
Published
2012-07-16
Volume
7
Issue
7
Pages
e40042
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2100332633
Cited by
115
References
44
Citations by year
2025: 1 · 2024: 1 · 2023: 2 · 2021: 21 · 2020: 10 · 2019: 13 · 2018: 10 · 2017: 22 · 2016: 16 · 2015: 8 · 2014: 5 · 2013: 4 · 2012: 2
FWCI
3.91
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Padua Research Archive (University of Padova) (submittedVersion, cc-by)
  • RePEc: Research Papers in Economics (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Figshare (submittedVersion, cc-by)
Funders
Ministry of Education, Culture, Sports, Science and Technology
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiomyopathy and Myosin Studies
  • Physical Sciences › Physics and Astronomy › Statistical and Nonlinear Physics › Advanced Thermodynamics and Statistical Mechanics
  • Physical Sciences › Physics and Astronomy › Statistical and Nonlinear Physics › stochastic dynamics and bifurcation
Keywords
muscle contraction, actomyosin, cross-bridge cycling, Huxley model, potential bias, diffusion theory, actin-myosin interaction, muscle force production
MeSH terms
Actomyosin, Diffusion, Models, Biological, Muscle Contraction, Sarcomeres, Temperature, Thermodynamics

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