Cited by 149Alzheimer's disease research and treatmentsProtein Structure and DynamicsPrion Diseases and Protein Misfolding

Identification of an Aggregation-Prone Structure of Tau

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Elbaum-Garfinkle, Shana, Rhoades, Elizabeth·2012·Journal of the American Chemical Society

Abstract

The aggregation and deposition of normally soluble proteins is the hallmark of several devastating neurodegenerative disorders. For proteins such as tau in Alzheimer's disease and α-synuclein in Parkinson's disease, aggregation involves a transition from an intrinsically disordered monomer to a highly structured fiber. While understanding the role of these proteins in neurodegeneration requires elucidation of the structural basis of self-association, the conformational heterogeneity of disordered proteins makes their structural characterization inherently challenging. Here we use single molecule Förster resonance energy transfer to measure the conformational ensemble of tau in the absence and presence of heparin to identify critical conformational changes relevant to the initiation of aggregation. We find that different domains of tau display distinct conformational properties that are strongly correlated with their degree of disorder and that may relate to their roles in aggregation. Moreover, we observe that heparin binding induces a distinct two-state structural transition in tau characterized by a loss of long-range contacts and a concomitant compaction of the microtubule binding domain. Our results describe a conformational intermediate of tau that precedes the formation of aggregates and could serve as a target for tau-focused therapeutics.

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  1. [24]Wilson DM Binder LI Am. J. Pathol 1997 150 2181 9176408 PMC1858305
  2. [56]Thirumalai D O’Brien EP Morrison G Brooks BR J. Chem. Phys 2009 130 PMC2736576 19334885

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Authors
Elbaum-Garfinkle, S., & Rhoades, E.
Affiliations
  • Department of Molecular Biophysics and Biochemistry, Yale University, 266 Whitney Avenue, New Haven, Connecticut 06520-8114, United States
  • Yale University (US)
Corresponding author
Rhoades, Elizabeth
Venue
Journal of the American Chemical Society
Published
2012-10-01
Volume
134
Issue
40
Pages
16607-16613
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W2004884414
Cited by
149
References
60
Citations by year
2026: 9 · 2025: 6 · 2024: 5 · 2023: 11 · 2022: 10 · 2021: 15 · 2020: 11 · 2019: 19 · 2018: 14 · 2017: 12 · 2016: 7 · 2015: 9 · 2014: 11 · 2013: 8 · 2012: 2
FWCI
6.44
Type
journal article
Language
en
Open access
Locations
  • Journal of the American Chemical Society (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Science Foundation
  • National Institutes of Health
  • National Institute of General Medical Sciences (T32GM007223)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Prion Diseases and Protein Misfolding
Keywords
tau protein, protein aggregation, conformational ensembles, intrinsically disordered proteins, heparin binding, microtubule-binding domain, conformational intermediates, Alzheimer's disease, single-molecule FRET, long-range contacts, neurodegeneration
MeSH terms
Alzheimer Disease, Anticoagulants, Heparin, Humans, Protein Conformation, tau Proteins, Fluorescence Resonance Energy Transfer

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