7U4P image
Entry Detail
PDB ID:
7U4P
Keywords:
Title:
Covalently stabilized triangular trimer composed of Abeta17-36 beta-hairpins
Biological Source:
Source Organism:
PDB Version:
Deposition Date:
2022-02-28
Release Date:
2023-03-15
Method Details:
Experimental Method:
Resolution:
1.80 Å
R-Value Free:
0.24
R-Value Work:
0.20
R-Value Observed:
0.20
Space Group:
P 62 2 2
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Amyloid-beta 17-36 peptide
Chain IDs:A, B, C
Chain Length:21
Number of Molecules:3
Biological Source:Homo sapiens
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
MEA A PHE modified residue
Primary Citation
Antibodies Raised Against an A beta Oligomer Mimic Recognize Pathological Features in Alzheimer's Disease and Associated Amyloid-Disease Brain Tissue.
Acs Cent.Sci. 10 104 121 (2024)
PMID: 38292607 DOI: 10.1021/acscentsci.3c00592

Abstact

Antibodies that target the β-amyloid peptide (Aβ) and its associated assemblies are important tools in Alzheimer's disease research and have emerged as promising Alzheimer's disease therapies. This paper reports the creation and characterization of a triangular Aβ trimer mimic composed of Aβ17-36 β-hairpins and the generation and study of polyclonal antibodies raised against the Aβ trimer mimic. The Aβ trimer mimic is covalently stabilized by three disulfide bonds at the corners of the triangular trimer to create a homogeneous oligomer. Structural, biophysical, and cell-based studies demonstrate that the Aβ trimer mimic shares characteristics with oligomers of full-length Aβ. X-ray crystallography elucidates the structure of the trimer and reveals that four copies of the trimer assemble to form a dodecamer. SDS-PAGE, size exclusion chromatography, and dynamic light scattering reveal that the trimer also forms higher-order assemblies in solution. Cell-based toxicity assays show that the trimer elicits LDH release, decreases ATP levels, and activates caspase-3/7 mediated apoptosis. Immunostaining studies on brain slices from people who lived with Alzheimer's disease and people who lived with Down syndrome reveal that the polyclonal antibodies raised against the Aβ trimer mimic recognize pathological features including different types of Aβ plaques and cerebral amyloid angiopathy.

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Primary Citation of related structures