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Discrete analyses of protein dynamics.

Tarun Jairaj Narwani1,2,3, Pierrick Craveur1,2,3,4, Nicolas K Shinada1,2,3,5

  • 1Biologie Intégrée du Globule Rouge UMR_S1134, Inserm, Univ. Paris, Univ. de la Réunion, Univ. des Antilles, Paris, France.

Journal of Biomolecular Structure & Dynamics
|July 31, 2019
PubMed
Summary

Large-scale protein dynamics simulations reveal distinct local conformational changes. Analysis of protein blocks (PBs) and secondary structures shows complex flexibility patterns beyond simple rigid or flexible models.

Keywords:
Local protein conformationsProtein DataBankdisorderflexibilitymolecular dynamicssecondary structuresolvent accessibilitystructural alphabet

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Area of Science:

  • Structural biology
  • Computational biophysics
  • Molecular dynamics

Background:

  • Protein structures are dynamic macromolecules, but their dynamics are often studied in isolation.
  • Understanding local protein conformation dynamics is crucial for comprehending protein function.

Purpose of the Study:

  • To explore large-scale protein dynamics simulations to observe local protein conformation dynamics from multiple perspectives.
  • To investigate protein flexibility using classical and innovative computational approaches.

Main Methods:

  • Molecular dynamics simulations were employed to analyze protein flexibility.
  • Classical methods like root mean square fluctuations (RMSf) and solvent accessibility were used.
  • Innovative approaches, including local entropy and a structural alphabet of protein blocks (PBs), were applied.

Main Results:

  • Distinct dynamic behaviors were observed between beta-turns and bends, challenging their categorization as a single group.
  • Analysis using protein blocks (PBs) revealed complex evolution of local conformations and potential exchanges between different PBs.
  • Observed dynamics were more intricate than simple rigid/flexible or coil/flexible models.

Conclusions:

  • Local protein dynamics exhibit complex behaviors that are not fully captured by traditional classifications.
  • The study highlights the utility of protein blocks (PBs) and local entropy for detailed analysis of protein flexibility.
  • Further investigation into the nuanced dynamics of local protein conformations is warranted.