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Molecular dynamics simulations on interaction between bacterial proteins: Implication on pathogenic activities.

Manas Mondal1, Jaydeb Chakrabarti1,2, Mahua Ghosh1

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Proteins
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Summary
This summary is machine-generated.

Salmonella Typhi proteins STY3179 and STY3178 form a stable complex. This interaction, involving an outer-membrane protein and a yfdX protein, may play a role in bacterial adhesion and invasion.

Keywords:
conformational thermodynamicsdockingextra-cellular loopsouter membrane proteinprotein-protein interface

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Area of Science:

  • Microbiology
  • Structural Biology
  • Computational Biology

Background:

  • Salmonella Typhi outer-membrane protein STY3179 is implicated in bacterial adhesion and invasion.
  • YfdX protein STY3178 exhibits antibiotic binding and chaperon activity.
  • Homologs of both proteins are found in numerous Gram-negative bacteria.

Purpose of the Study:

  • To investigate the interaction between Salmonella Typhi proteins STY3179 and STY3178.
  • To elucidate the molecular basis of their complex formation and stability.

Main Methods:

  • Homology modeling
  • Molecular docking
  • Molecular dynamics simulations
  • Conformational thermodynamics analysis

Main Results:

  • STY3179 and STY3178 form a stable complex.
  • The interaction is mediated by polar and acidic residues at the protein interface.
  • Complexation leads to instability in STY3179's extracellular loops, suggesting potential host cell interactions.

Conclusions:

  • The study reveals a stable complex formation between STY3179 and STY3178 in Salmonella Typhi.
  • The findings provide insights into the molecular mechanisms of bacterial adhesion and invasion.
  • The observed instability in STY3179 loops may indicate a role in host cell protein binding, such as laminin.