Cited by 81Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchNeuroinflammation and Neurodegeneration Mechanisms

Molecular basis of β-amyloid oligomer recognition with a conformational antibody fragment

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Morgado, Isabel, Wieligmann, Karin, Bereza, Magdalena, Rönicke, Raik, Meinhardt, Katrin, Annamalai, Karthikeyan, Baumann, Monika, Wacker, Jessica +11 more·2012·Proceedings of the National Academy of Sciences

Abstract

Oligomers are intermediates of the β-amyloid (Aβ) peptide fibrillogenic pathway and are putative pathogenic culprits in Alzheimer’s disease (AD). Here we report the biotechnological generation and biochemical characterization of an oligomer-specific antibody fragment, KW1. KW1 not only discriminates between oligomers and other Aβ conformations, such as fibrils or disaggregated peptide; it also differentiates between different types of Aβ oligomers, such as those formed by Aβ (1–40) and Aβ (1–42) peptide. This high selectivity of binding contrasts sharply with many other conformational antibodies that interact with a large number of structurally analogous but sequentially different antigens. X-ray crystallography, NMR spectroscopy, and peptide array measurements imply that KW1 recognizes oligomers through a hydrophobic and significantly aromatic surface motif that includes Aβ residues 18–20. KW1-positive oligomers occur in human AD brain samples and induce synaptic dysfunctions in living brain tissues. Bivalent KW1 potently neutralizes this effect and interferes with Aβ assembly. By altering a specific step of the fibrillogenic cascade, it prevents the formation of mature Aβ fibrils and induces the accumulation of nonfibrillar aggregates. Our data illuminate significant mechanistic differences in oligomeric and fibril recognition and suggest the considerable potential of KW1 in future studies to detect or inhibit specific types of Aβ conformers.

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Crossref · 10.1073/pnas.1206433109

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Authors
Morgado, I., Wieligmann, K., Bereza, M., Rönicke, R., Meinhardt, K., Annamalai, K., Baumann, M., Wacker, J., Hortschansky, P., Malešević, M., Parthier, C., Mawrin, C., Schiene-Fischer, C., Reymann, K. G., Stubbs, M. T., Balbach, J., Görlach, M., Horn, U., & Fändrich, M.
Affiliations
  • Martin Luther University Halle-Wittenberg (DE)
  • Leibniz-Institut für Naturstoff-Forschung und Infektionsbiologie e. V. - Hans-Knöll-Institut (HKI) (DE)
  • German Center for Neurodegenerative Diseases (DE)
  • Max Planck Research Unit for Enzymology of Protein Folding (DE)
  • Otto-von-Guericke-Universität Magdeburg (DE)
  • Max Planck Research Unit for Enzymology of Protein Folding, 06120 Halle (Saale), Germany;
  • Leibniz Institute on Aging - Fritz Lipmann Institute (FLI) (DE)
Corresponding author
Fändrich, Marcus
Venue
Proceedings of the National Academy of Sciences
Published
2012-07-18
Volume
109
Issue
31
Pages
12503-12508
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W1995178392
Cited by
80
References
46
Citations by year
2025: 3 · 2024: 2 · 2023: 4 · 2022: 3 · 2021: 4 · 2020: 5 · 2019: 6 · 2018: 12 · 2017: 5 · 2016: 9 · 2015: 12 · 2014: 8 · 2013: 7
FWCI
5.79
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • DZNE Pub (submittedVersion)
Funders
  • Alzheimer Forschung Initiative
  • Deutsche Forschungsgemeinschaft
  • Bundesministerium für Bildung und Forschung
  • European Regional Development Fund
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 › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
amyloid-beta oligomers, conformational antibodies, Alzheimer's disease, synaptic dysfunction
MeSH terms
Antibodies, Monoclonal, Humans, Peptide Fragments, Amyloid beta-Peptides, Crystallography, X-Ray, Nuclear Magnetic Resonance, Biomolecular, Amino Acid Motifs, Protein Structure, Quaternary, Protein Multimerization

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