Structural Changes Associated with Transthyretin Misfolding and Amyloid Formation Revealed by Solution and Solid-State NMR
- East Carolina Univ., Greenville, NC (United States). Dept. of Chemistry
- Center of Interdisciplinary Magnetic Resonance (CIMAR) and National High Magnetic Field Lab. (NHMFL), Tallahassee, FL (United States)
- Scripps Research Inst., La Jolla, CA (United States). Dept. of Molecular and Experimental Medicine and Skaggs Inst. for Chemical Biology
- 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
Web of Science
Similar Records
Heterogeneous Seeding of a Prion Structure by a Generic Amyloid Form of the Fungal Prion-forming Domain HET-s(218-289)
Heterogeneous Seeding of a Prion Structure by a Generic Amyloid Form of the Fungal Prion-forming Domain HET-s(218–289)