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Related Concept Videos

Protein-protein Interfaces02:04

Protein-protein Interfaces

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 polypeptide...
Protein-Protein Interfaces02:04

Protein-Protein Interfaces

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 polypeptide...
Protein Networks02:26

Protein Networks

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.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
Protein Networks02:26

Protein Networks

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.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
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...
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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Related Experiment Video

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Identification of Protein Interacting Partners Using Tandem Affinity Purification
10:02

Identification of Protein Interacting Partners Using Tandem Affinity Purification

Published on: February 25, 2012

Protein tango: the toolbox to capture interacting partners.

Anna Rutkowska1, Carsten Schultz

  • 1Cell Biology & Biophysics Unit, European Molecular Biology Laboratory, Meyerhofstr. 1, 69117 Heidelberg, Germany.

Angewandte Chemie (International Ed. in English)
|June 13, 2012
PubMed
Summary

Understanding protein function requires studying protein-protein interactions. New cross-linking and dimerization tools allow specific manipulation of these interactions within living cells, aiding complex network analysis.

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Area of Science:

  • Cellular Biology
  • Molecular Biology
  • Biochemistry

Background:

  • Protein function is integral to understanding living systems.
  • Identifying and modulating protein-protein interactions is critical in cellular and extracellular contexts.
  • Existing methods allow for the detection and induction of protein-protein interactions in living cells.

Purpose of the Study:

  • To review available cross-linking and dimerization-inducing tools.
  • To explain the application of these tools for manipulating protein interactions.
  • To highlight their utility in dissecting complex protein networks.

Main Methods:

  • Review of chemical cross-linkers for protein interaction studies.
  • Description of small molecule inducers of dimerization.
  • Discussion of techniques for specific protein cross-linking and dimerization in vivo.

Main Results:

  • A comprehensive overview of available cross-linking and dimerization tools is provided.
  • Methods for specific and controlled manipulation of protein interactions are detailed.
  • The potential for dissecting complex cellular networks using these tools is demonstrated.

Conclusions:

  • The described toolbox of cross-linkers and dimerization inducers offers powerful means to study protein function.
  • These techniques enable precise manipulation of protein-protein interactions, advancing the understanding of cellular mechanisms.
  • This work facilitates the exploration of intricate protein networks within living cells.