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Title: Mechanism of copper(II)-induced misfolding of Parkinson's disease protein

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep00011· OSTI ID:1564755
 [1];  [1];  [1]
  1. North Carolina State Univ., Raleigh, NC (United States). Center for High Performance Simulation and Dept. of Physics

α-synuclein (aS) is a natively unfolded pre-synaptic protein found in all Parkinson's disease patients as the major component of fibrillar plaques. Metal ions and especially Cu(II), have been demonstrated to accelerate aggregation of aS into fibrillar plaques, the precursors to Lewy bodies. In this work, copper binding to aS is investigated by a combination of quantum and molecular mechanics simulations. Starting from the experimentally observed attachment site, several optimized structures of Cu-binding geometries are examined. The most energetically favorable attachment results in significant allosteric changes, making aS more susceptible to misfolding. Indeed, an inverse kinematics investigation of the configuration space uncovers a dynamically stable β-sheet conformation of Cu-aS that serves as a nucleation point for a second β-strand. Based on these findings, we propose an atomistic mechanism of copper-induced misfolding of aS as an initial event in the formation of Lewy bodies and thus in PD pathogenesis.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); North Carolina State University, Raleigh, NC (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
FG02-98ER45685
OSTI ID:
1564755
Journal Information:
Scientific Reports, Vol. 1, Issue 1; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 60 works
Citation information provided by
Web of Science

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Cited By (16)

The unravelling of metabolic dysfunctions linked to metal-associated diseases by blue native polyacrylamide gel electrophoresis journal September 2012
The Chemistry of Neurodegeneration: Kinetic Data and Their Implications journal June 2015
Interaction of Cu( i ) with the Met-X 3 -Met motif of alpha-synuclein: binding ligands, affinity and structural features journal January 2018
Copper dyshomoeostasis in Parkinson's disease: implications for pathogenesis and indications for novel therapeutics journal March 2016
Low levels of copper disrupt brain amyloid-β homeostasis by altering its production and clearance journal August 2013
Free fermions with a localized source journal November 2019
Copper chelators promote nonamyloidogenic processing of AβPP via MT 1/2 /CREB-dependent signaling pathways in AβPP/PS1 transgenic mice journal May 2018
Role of zinc and copper ions in the pathogenetic mechanisms of Alzheimer’s and Parkinson’s diseases journal May 2014
The Potential for Transition Metal-Mediated Neurodegeneration in Amyotrophic Lateral Sclerosis journal July 2014
Parkinson's Disease and the Environment journal March 2019
Metallothionein, Copper and Alpha-Synuclein in Alpha-Synucleinopathies journal April 2017
Tuning the Balance between Fibrillation and Oligomerization of α-Synuclein in the Presence of Dopamine journal October 2018
The non-octarepeat copper binding site of the prion protein is a key regulator of prion conversion journal October 2015
Environmental and genetic factors support the dissociation between α-synuclein aggregation and toxicity journal October 2016
A model of HIV drug resistance driven by heterogeneities in host immunity and adherence patterns journal January 2013
The interactome of the copper transporter ATP7A belongs to a network of neurodevelopmental and neurodegeneration factors journal March 2017

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