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Related Concept Videos

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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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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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A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
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Identification of Protein Interaction Partners in Mammalian Cells Using SILAC-immunoprecipitation Quantitative Proteomics
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Proteomic applications in identifying protein-protein interactions.

Benjamin T Veenstra1, Timothy D Veenstra2

  • 1Department of Math and Sciences, Cedarville University, Cedarville, OH, United States.

Advances in Protein Chemistry and Structural Biology
|January 14, 2024
PubMed
Summary

Identifying protein interactions is key to understanding protein function. High-throughput proteomic technologies now enable rapid discovery of hundreds of protein-protein interactions (PPIs), advancing biological research.

Keywords:
Chemical-crosslinkingCo-fractionationImmunoaffinityMass spectrometryProtein complexesProtein identificationProteomicsProximity labelingYeast-two-hybrid screening

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Area of Science:

  • Proteomics
  • Molecular Biology
  • Biochemistry

Background:

  • Protein function is crucial and best determined by its interactions.
  • Historically, protein interactions were identified one by one, limiting discovery.
  • Technological advancements have revolutionized the scale of protein interaction studies.

Purpose of the Study:

  • To highlight the significance of identifying protein-protein interactions (PPIs).
  • To review current state-of-the-art technologies for PPI discovery.
  • To illustrate the capabilities in modern proteomic research.

Main Methods:

  • High-throughput multiplexed proteomic technologies.
  • Advances in mass spectrometry.
  • Improvements in sample preparation and chromatography.

Main Results:

  • Dramatically increased rate of protein-protein interaction discovery.
  • Feasibility of identifying thousands of interactions in single experiments.
  • Enabled a deeper understanding of complex biological systems.

Conclusions:

  • Identifying protein-protein interactions is essential for defining protein function.
  • Modern high-throughput proteomic technologies have accelerated PPI discovery.
  • Ongoing technological advancements continue to push the boundaries of proteomic research.