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The Cellular Environment Affects Monomeric α-Synuclein Structure.

Amberley D Stephens1, Maria Zacharopoulou1, Gabriele S Kaminski Schierle1

  • 1Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, CB3 0AS, UK.

Trends in Biochemical Sciences
|December 12, 2018
PubMed
Summary

Intrinsically disordered protein alpha-synuclein (aSyn) normally avoids toxic aggregation through intramolecular interactions. Environmental factors like pH and salt can disrupt these interactions, promoting disease-associated structures.

Keywords:
amyloidcellular environmentlocalisationmonomerstructureα-synuclein

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Area of Science:

  • Neuroscience
  • Biochemistry
  • Protein Dynamics

Background:

  • Alpha-synuclein (aSyn) is a presynaptic protein implicated in Parkinson's disease.
  • aSyn is intrinsically disordered, exhibiting high conformational flexibility.
  • Pathological hallmarks include insoluble aSyn inclusions, suggesting a loss of normal regulatory mechanisms.

Purpose of the Study:

  • To review how environmental factors influence the intramolecular interactions of aSyn.
  • To explore how these environmental modulations may lead to toxic aSyn conformations.
  • To highlight the importance of understanding aSyn dynamics for therapeutic development.

Main Methods:

  • Literature review focusing on the structural dynamics of monomeric aSyn.
  • Analysis of how environmental variables (charge, pH, calcium, salt) affect aSyn conformation.
  • Discussion of the link between altered aSyn structure and synucleinopathies.

Main Results:

  • Transient intramolecular interactions normally stabilize monomeric aSyn and prevent aggregation.
  • Environmental factors such as pH, charge, calcium, and salt concentration can disrupt these stabilizing interactions.
  • Disruption of intramolecular interactions may promote the formation of toxic aSyn species.

Conclusions:

  • Understanding the environmental modulation of aSyn's dynamic structure is crucial.
  • Targeting these environmental influences could lead to novel therapeutic strategies for Parkinson's disease and related disorders.
  • Further research into aSyn conformational dynamics is essential for effective treatment design.