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Protein Surface Interactions-Theoretical and Experimental Studies.

Fabio C L Almeida1,2, Karoline Sanches1,2,3, Ramon Pinheiro-Aguiar1,2

  • 1Institute of Medical Biochemistry-IBqM, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.

Frontiers in Molecular Biosciences
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Summary
This summary is machine-generated.

Proteins can be stabilized by surface forces, not just hydrophobic cores. Nuclear magnetic resonance (NMR) studies reveal dynamic surface clusters in proteins, influencing their function and interactions.

Keywords:
NMRclustersdynamicshydrophobic surface clustersinterdomainsolvationsurface

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Area of Science:

  • Biochemistry
  • Structural Biology
  • Biophysics

Background:

  • Protein folding is typically explained by the hydrophobic effect.
  • Direct surface forces contributing to protein stabilization are often overlooked.
  • Hydrophobic surface clusters can exist in proteins lacking a traditional hydrophobic core.

Purpose of the Study:

  • To review the role of direct surface forces in protein stabilization.
  • To highlight NMR-based studies on proteins with hydrophobic surface clusters.
  • To explore the functional implications of protein surface dynamics and interactions.

Main Methods:

  • Theoretical discussion of protein folding.
  • Nuclear Magnetic Resonance (NMR) spectroscopy for protein stability and dynamics.
  • Analysis of nuclear relaxation data.
  • Examination of protein surfaces and internal water cavities.

Main Results:

  • Proteins can remain stable without a hydrophobic core, utilizing hydrophobic surface clusters instead.
  • NMR-based protein dynamics measurements reveal the significance of these dynamic surface clusters.
  • Hydrophobic surface clusters are present in multidomain proteins and mediate transient interactions.
  • Surface interactions influence the reactivity of protein post-translational modifications like S-nitrosation.

Conclusions:

  • Direct surface forces play a crucial role in protein stabilization, complementing the hydrophobic effect.
  • Protein dynamics, particularly at the surface, are key to understanding protein function and interactions.
  • Investigating surface properties provides insights into protein regulation and post-translational modification reactivity.