Cited by 258Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchPrion Diseases and Protein Misfolding

On the Seeding and Oligomerization of pGlu-Amyloid Peptides (in vitro)

Schilling, Stephan, Lauber, Thomas, Schaupp, Michael, Manhart, Susanne, Scheel, Eike, Böhm, Gerald, Demuth, Hans-Ulrich·2006·Biochemistry

Abstract

Oligomerization of amyloid beta (Abeta) peptides is the decisive event in the development of Alzheimer's disease (AD), the most common neurogenerative disorder in developed countries. Recent evidence links this conformation-driven process to primary- and secondary-structure modifications of Abeta. The N and C terminus of deposited Abeta has been shown to possess conspicuous heterogeneity. While the C-terminally longer form of Abeta, i.e., Abeta (42), is considered more amyloidogenic, the role of the N-terminal modifications, e.g., truncation and glutamate cyclization accounting for the majority of the deposited peptides, is less understood. In the present study, we characterized the oligomerization and seeding capacity of pGlu-amyloid peptides using two unrelated techniques based on flow cytometry or flourescence dye binding. Under different conditions and irrespective of the C terminus of Abeta, i.e., Abeta40 or 42, pGlu-modified peptides displayed an up to 250-fold accelerated initial formation of aggregates compared to unmodified Abeta. The accelerated seed formation is accompanied by a change in the oligomerization kinetics because of N-terminal pGlu formation. Furthermore, the formation of mixed aggregates consisting of either pGlu-Abeta (3-42) or ADan or ABri and Abeta (1-42) was investigated by Abeta fluorescence labeling in flow cytometry. The results suggest that pGlu-modified peptides are potential seeding species of aggregate formation in vivo. The data presented here and the abundance of pGlu peptides in amyloidoses, such as FBD and AD, suggest pGlu-amyloid peptides as a species with biophysical characteristics that might be in particular crucial for the initiation of the disease.

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Crossref · 10.1021/bi0612667

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  • AβpE3 species have enhanced aggregation propensity and increased stability to resist proteolytic degradation.

    “These species are interesting because of their distinct biophysical properties, comprising enhanced aggregation propensity [96] and increased stability to resist proteolytic degradation [97].”

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Authors
Schilling, S., Lauber, T., Schaupp, M., Manhart, S., Scheel, E., Böhm, G., & Demuth, H.-U.
Affiliations
Probiodrug (Germany) (DE)
Venue
Biochemistry
Published
2006-09-20
Volume
45
Issue
41
Pages
12393-12399
ISSN
  • 0006-2960 (ISSN-L)
  • 1520-4995
OpenAlex
W1999017783
Cited by
254
References
39
Citations by year
2026: 3 · 2025: 4 · 2024: 11 · 2023: 7 · 2022: 10 · 2021: 13 · 2020: 10 · 2019: 13 · 2018: 13 · 2017: 13 · 2016: 15 · 2015: 13 · 2014: 21 · 2013: 14 · 2012: 27
FWCI
9.28
Type
journal article
Language
en
Open access
closed
Locations
  • Biochemistry (publishedVersion)
  • PubMed (publishedVersion)
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
amyloid-beta, amyloid seeding, oligomerization, Alzheimer's disease, N-terminal truncation, Aβ40, amyloid-beta 42, oligomerization kinetics, amyloid fibril formation, frontotemporal dementia
MeSH terms
Flow Cytometry, Fluorescent Dyes, Humans, Peptide Fragments, Pyrrolidonecarboxylic Acid, Thiazoles, Amyloid beta-Peptides, Protein Structure, Quaternary, Benzothiazoles, In Vitro Techniques

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