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Related Concept Videos

Protein Complexes with Interchangeable Parts01:57

Protein Complexes with Interchangeable Parts

Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...

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Analysis of Protein Complex Formation at Micromolar Concentrations by Coupling Microfluidics with Mass Photometry
06:39

Analysis of Protein Complex Formation at Micromolar Concentrations by Coupling Microfluidics with Mass Photometry

Published on: January 26, 2024

Fine-tuning multiprotein complexes using small molecules.

Andrea D Thompson1, Amanda Dugan, Jason E Gestwicki

  • 1Program in Chemical Biology, University of Michigan, Ann Arbor, MI 48109, USA.

ACS Chemical Biology
|June 26, 2012
PubMed
Summary

Targeting protein-protein interactions (PPIs) in multiprotein complexes is challenging. Natural systems offer insights into regulating difficult PPIs with small molecules for controlling cellular activities.

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Last Updated: May 21, 2026

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Area of Science:

  • Molecular Biology
  • Biochemistry
  • Drug Discovery

Background:

  • Multiprotein complexes integrate enzymes and non-enzymes to regulate cellular activities.
  • Traditional drug strategies target enzymes, but emerging approaches focus on modulating protein-protein interactions (PPIs).
  • Targeting PPIs presents significant challenges due to their diversity, large interface areas, and weak affinities.

Purpose of the Study:

  • To review strategies for overcoming challenges in targeting PPIs within multiprotein complexes.
  • To explore how natural systems regulate difficult PPIs.
  • To provide a blueprint for developing small molecules that target challenging PPIs.

Main Methods:

  • Review of existing literature on PPIs and multiprotein complexes.
  • Analysis of allosteric and other regulatory mechanisms in natural biological systems.
  • Discussion of potential small molecule strategies for PPI modulation.

Main Results:

  • Natural systems utilize mechanisms like allostery to regulate complex PPIs.
  • Lessons from natural systems can guide the development of novel therapeutic strategies.
  • Understanding these mechanisms is key to controlling molecular decision-making in cellular systems.

Conclusions:

  • Modulating PPIs is a promising strategy for controlling multiprotein complex function.
  • Natural regulatory mechanisms offer valuable insights for drug discovery.
  • Targeting challenging PPIs requires innovative approaches inspired by biological systems.