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Title: Structural Changes Associated with Transthyretin Misfolding and Amyloid Formation Revealed by Solution and Solid-State NMR

Journal Article · · Biochemistry
 [1];  [1];  [2];  [2];  [3];  [4]
  1. East Carolina Univ., Greenville, NC (United States). Dept. of Chemistry
  2. Center of Interdisciplinary Magnetic Resonance (CIMAR) and National High Magnetic Field Lab. (NHMFL), Tallahassee, FL (United States)
  3. Scripps Research Inst., La Jolla, CA (United States). Dept. of Molecular and Experimental Medicine and Skaggs Inst. for Chemical Biology
  4. Univ. of California, Berkeley, CA (United States). Dept. of Chemistry

Elucidation of structural changes involved in protein misfolding and amyloid formation is crucial for unraveling the molecular basis of amyloid formation. We report structural analyses of the amyloidogenic intermediate and amyloid aggregates of transthyretin using solution and solid-state nuclear magnetic resonance (NMR) spectroscopy. These NMR solution results show that one of the two main β-sheet structures (CBEF β-sheet) is maintained in the aggregation-competent intermediate, while the other DAGH β-sheet is more flexible on millisecond time scales. Magic-angle-spinning solid-state NMR revealed that AB loop regions interacting with strand A in the DAGH β-sheet undergo conformational changes, leading to the destabilized DAGH β-sheet.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
National Institutes of Health (NIH); National Science Foundation (NSF)
Grant/Contract Number:
AC02-05CH11231; NS084138; DMR-1157490
OSTI ID:
1379292
Journal Information:
Biochemistry, Vol. 55, Issue 13; ISSN 0006-2960
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 35 works
Citation information provided by
Web of Science

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Cited By (6)

Probing conformational changes of monomeric transthyretin with second derivative fluorescence journal July 2019
Transthyretin Aggregation Pathway toward the Formation of Distinct Cytotoxic Oligomers journal January 2019
Exploration of the Misfolding Mechanism of Transthyretin Monomer: Insights from Hybrid-Resolution Simulations and Markov State Model Analysis journal December 2019
Kinetic and structural comparison of a protein’s cotranslational folding and refolding pathways journal May 2018
Biophysical characterization and modulation of Transthyretin Ala97Ser journal September 2019
Clinical Presentation, Diagnosis and Treatment of TTR Amyloidosis journal May 2019

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