Cited by 2,022Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchPrion Diseases and Protein Misfolding

The carboxy terminus of the .beta. amyloid protein is critical for the seeding of amyloid formation: Implications for the pathogenesis of Alzheimer's disease

Jarrett, Joseph T., Berger, Elizabeth P., Lansbury, Peter T.·1993·Biochemistry

Abstract

Several variants of the beta amyloid protein, differing only at their carboxy terminus (beta 1-39, beta 1-40, beta 1-42, and beta 1-43), have been identified as the major components of the cerebral amyloid deposits which are characteristic of Alzheimer's disease. Kinetic studies of aggregation by three naturally occurring beta protein variants (beta 1-39, beta 1-40, beta 1-42) and four model peptides (beta 26-39, beta 26-40, beta 26-42, beta 26-43) demonstrate that amyloid formation, like crystallization, is a nucleation-dependent phenomenon. This discovery has practical consequences for studies of the beta amyloid protein. The length of the C-terminus is a critical determinant of the rate of amyloid formation ("kinetic solubility") but has only a minor effect on the thermodynamic solubility. Amyloid formation by the kinetically soluble peptides (e.g., beta 1-39, beta 1-40, beta 26-39, beta 26-40) can be nucleated, or "seeded", by peptides which include the critical C-terminal residues (beta 1-42, beta 26-42, beta 26-43, beta 34-42). These results suggest that nucleation may be the rate-determining step of in vivo amyloidogenesis and that beta 1-42 and/or beta 1-43, rather than beta 1-40, may be the pathogenic protein(s) in AD.

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Crossref · 10.1021/bi00069a001

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Authors
Jarrett, J. T., Berger, E. P., & Lansbury, P. T.
Affiliations
Massachusetts Institute of Technology (US)
Venue
Biochemistry
Published
1993-05-11
Volume
32
Issue
18
Pages
4693-4697
ISSN
  • 0006-2960 (ISSN-L)
  • 1520-4995
OpenAlex
W2071953900
Cited by
2,022
References
3
Citations by year
2026: 33 · 2025: 47 · 2024: 45 · 2023: 36 · 2022: 52 · 2021: 73 · 2020: 70 · 2019: 58 · 2018: 61 · 2017: 68 · 2016: 79 · 2015: 71 · 2014: 93 · 2013: 82 · 2012: 99
FWCI
30.22
Type
journal article
Language
en
Open access
closed
Locations
  • Biochemistry (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5t32gm008318-04)
  • National Institute on Aging (AG08470-01, R01AG008470)
  • National Institute of General Medical Sciences (1T32GM08318-01)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Prion Diseases and Protein Misfolding
Keywords
beta-amyloid protein, C-terminal truncation, amyloid seeding, nucleation, Alzheimer's disease pathogenesis, amyloid fibril formation, kinetic solubility, thermodynamic solubility
MeSH terms
Alzheimer Disease, Amino Acid Sequence, Amyloid, Humans, Models, Biological, Molecular Sequence Data, Peptide Fragments, Protein Conformation, Solubility, Spectrophotometry, Infrared, Thermodynamics, Time Factors, Amyloid beta-Peptides

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