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Related Concept Videos

Protein-protein Interfaces02:04

Protein-protein Interfaces

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Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a...
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Cooperative Allosteric Transitions01:58

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Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...
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Ligand Binding Sites02:40

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Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands.
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Protein Networks02:26

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An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
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Conserved Binding Sites01:49

Conserved Binding Sites

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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.
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Topologically Tunable α-Helix Mimetics for Targeting Protein-Protein Interactions.

Tae-Kyung Lee1, Luxi Chen1, Chia-Yuan Chen1

  • 1Department of Chemistry and Biochemistry, University of Texas at Dallas, Richardson, TX, 75080, USA.

Angewandte Chemie (International Ed. in English)
|September 17, 2025
PubMed
Summary
This summary is machine-generated.

Researchers developed a tunable biphenyl scaffold to mimic protein interactions, creating selective inhibitors for anti-apoptotic proteins. This novel approach precisely replicates complex alpha-helical structures.

Keywords:
BH3 peptidomimeticsDisruption of protein–protein interactionsN,N′‐Diphenyl‐4,4′‐biphenyldicarboxamide scaffoldRegioisomers for topological controlα‐Helix mimetics

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Area of Science:

  • Medicinal Chemistry
  • Structural Biology
  • Organic Synthesis

Background:

  • Protein-protein interactions (PPIs) are crucial in biological processes.
  • Mimicking alpha-helical conformations at PPI interfaces is challenging.
  • The BH3 domains of Bcl-2 proteins are key targets for cancer therapy.

Purpose of the Study:

  • To develop a novel scaffold for replicating diverse alpha-helical conformations.
  • To create customizable alpha-helix mimetics using N,N'-diphenyl-4,4'-biphenyldicarboxamide.
  • To design inhibitors targeting anti-apoptotic Bcl-2 family proteins.

Main Methods:

  • Design and synthesis of topologically tunable biphenyl scaffolds.
  • Evaluation of scaffolds for mimicking BH3 domains of Bcl-2 proteins.
  • Modification of substituents to achieve pan-active and selective inhibition.

Main Results:

  • A library of N,N'-diphenyl-4,4'-biphenyldicarboxamide scaffolds was synthesized.
  • Scaffolds successfully mimicked a wide range of helical surfaces.
  • Developed both pan-active and selective inhibitors of anti-apoptotic Bcl-2 proteins with distinct binding profiles.

Conclusions:

  • The developed biphenyl scaffold is a powerful tool for mimicking natural alpha-helices.
  • This approach allows for the precise replication of subtle conformational differences.
  • Enables the development of targeted inhibitors for Bcl-2 family proteins.