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Conserved Binding Sites

Conserved Binding Sites

Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses the...

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Related Experiment Video

Updated: Jun 3, 2026

Selection of Aptamers for Amyloid β-Protein, the Causative Agent of Alzheimer's Disease

Selection of Aptamers for Amyloid β-Protein, the Causative Agent of Alzheimer's Disease

Published on: May 13, 2010

Mapping ApoE/Aβ binding regions to guide inhibitor discovery.

Qian Liu¹, Wei-hui Wu, Chuan-lin Fang

¹Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology, Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, PR China.

Molecular Biosystems

|March 17, 2011

Summary

Researchers identified smaller peptide segments and compounds like Congo Red that block the interaction between apolipoprotein E (ApoE) and amyloid beta (Aβ), offering new therapeutic targets for Alzheimer's disease (AD).

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Area of Science:

Neuroscience
Biochemistry
Pharmacology

Background:

The interaction between apolipoprotein E (ApoE) E4 isoform and amyloid beta-peptide (Aβ) is a key factor in Alzheimer's disease (AD) pathogenesis.
Existing therapeutic strategies are limited, necessitating novel approaches targeting protein-protein interactions in AD.

Purpose of the Study:

To identify smaller, druggable regions within ApoE and Aβ responsible for their interaction.
To discover novel inhibitors that can block the ApoE/Aβ interaction for potential AD treatment.

Main Methods:

Peptide mapping to identify critical interaction domains between ApoE and Aβ.
Rational design and modification of peptide inhibitors to enhance binding affinity.
Screening of small molecules, including Congo Red and X-34, for inhibitory activity against ApoE/Aβ interaction.

Main Results:

Identified specific peptide segments within ApoE and Aβ crucial for their interaction.
Developed modified peptides demonstrating substantial inhibition of ApoE/Aβ binding.
Discovered that Congo Red and X-34 effectively inhibit ApoE/Aβ interaction, potentially by targeting Aβ self-interaction regions.

Conclusions:

The study provides a refined understanding of the ApoE/Aβ interaction interface.
Identified novel peptide and small molecule inhibitors that antagonize ApoE/Aβ binding.
These findings offer promising therapeutic avenues for developing new treatments for Alzheimer's disease.