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MS2 bacteriophage capsid studied using all-atom molecular dynamics.

Vladimir S Farafonov1, Dmitry Nerukh2

  • 1Department of Physical Chemistry, V. N. Karazin Kharkiv National University, 61022 Kharkiv, Ukraine.

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Summary
This summary is machine-generated.

This study models the MS2 bacteriophage capsid using cryo-electron microscopy and molecular dynamics. It reveals ion layer formation and significant water and ion flow through the capsid pores under physiological conditions.

Keywords:
MS2 virus capsidflow of solutionions distribution

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Area of Science:

  • Structural biology
  • Biophysics
  • Computational biology

Background:

  • The MS2 bacteriophage capsid is a protein shell crucial for viral function.
  • Understanding its structural dynamics and interactions with the surrounding environment is essential.

Purpose of the Study:

  • To build an all-atom model of the MS2 bacteriophage capsid.
  • To investigate capsid structural integrity and solution dynamics using molecular dynamics simulations.
  • To quantify molecular and ion transport through the capsid pores.

Main Methods:

  • High-resolution cryo-electron microscopy (EM) for initial capsid conformation.
  • All-atom molecular dynamics (MD) simulations.
  • Analysis of ion and water molecule dynamics.

Main Results:

  • The capsid structure remained stable under physiological conditions (room temperature, physiological ion concentrations).
  • A distinct anion layer formed on the inner capsid surface, and a diffuse cation layer formed on the outer surface.
  • Considerable water and substantial ion flux were quantified through the capsid pores.

Conclusions:

  • The MS2 bacteriophage capsid maintains structural integrity in physiological conditions.
  • The capsid exhibits selective ion and water permeability.
  • These findings provide insights into viral capsid-host interactions and potential applications in nanotechnology.