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2000
Volume 14, Issue 1
  • ISSN: 1570-1646
  • E-ISSN: 1875-6247

Abstract

Background: Aggregation of Human α-synuclein protein into well-ordered amyloid fibrils is critical at the onset of Parkinson’s disease (PD), a progressive and irreversible neurodegenerative disorder. In the recent past, the importance of tyrosine residues in the fibrillation process of α-synuclein has been highlighted but their definite role in the early events of fibrillation is not clear. Objective: To understand the role of Tyr residues on the early events of α-synuclein fibrillation process. Methodology: We have used the all the atom molecular dynamics simulation and investigated the conformational dynamics of wild-type (WT) and the three modelled Tyr mutants (Y39A, Y133A, and Y (125,133,136) A) of α-synuclein. Results: Among the WT and the mutants, we observed Y(125, 133, 136)A and Y133A to have lesser number of hydrophobic contacts between the residues in the N- and C-terminal regions, exhibiting a differing folding pattern and conformation that has the ability to delay the aggregation propensity of α-synuclein. We also found that Tyr residue at position 133 is primarily important to drive the intramolecular interactions and subsequent fibrillation process. Conclusion: Therefore, our findings in this study suggest that targeting the Tyr residue at the position 133 may provide better solution to significant delay in the early stage of aggregation in α- synuclein.

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/content/journals/cp/10.2174/1570164614666161206143325
2017-03-01
2025-06-01
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/content/journals/cp/10.2174/1570164614666161206143325
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  • Article Type:
    Research Article
Keyword(s): Amyloid; fibrillation; molecular dynamics; parkinson’s disease; protein folding
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