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Related Concept Videos

Protein Networks02:26

Protein Networks

3.9K
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,...
3.9K
Protein-protein Interfaces02:04

Protein-protein Interfaces

12.4K
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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Related Experiment Video

Updated: May 24, 2025

Resolving Affinity Purified Protein Complexes by Blue Native PAGE and Protein Correlation Profiling
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Affinity Purification Mass Spectrometry on the Orbitrap-Astral Mass Spectrometer Enables High-Throughput

Lia R Serrano1,2, Adrian Pelin3,4,5, Tabiwang N Arrey6

  • 1Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States.

Journal of Proteome Research
|March 3, 2025
PubMed
Summary

This study enhances protein-protein interaction (PPI) network generation using rapid affinity purification mass spectrometry (AP-MS) on the Orbitrap-Astral system. The new method significantly increases throughput, enabling larger-scale PPI studies with faster sample analysis.

Keywords:
AP-MSAstralPPIshost–pathogen

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Area of Science:

  • Proteomics
  • Biochemistry
  • Mass Spectrometry

Background:

  • Classical proteomics provides protein quantification but not spatial organization or protein-protein interaction (PPI) networks.
  • Affinity purification mass spectrometry (AP-MS) is crucial for PPI network generation but faces throughput limitations.
  • Technological advancements are needed to accelerate AP-MS sample processing and experiment scale.

Purpose of the Study:

  • To develop a high-throughput AP-MS methodology using advanced mass spectrometry hardware.
  • To demonstrate the capability of rapid separations and data acquisition for quantitative proteomics.
  • To generate a comprehensive human-viral protein interaction map.

Main Methods:

  • Utilized the Orbitrap-Astral mass spectrometer with high-flow liquid chromatography (7 min separations).
  • Analyzed 216 AP-MS samples in approximately 29 hours.
  • Employed narrow-bin data-independent acquisition enabled by ion-focusing, rapid mass analysis, and sensitive detection.

Main Results:

  • Achieved high-throughput quantitative proteomics with rapid separations.
  • Generated an interaction map between 998 human proteins and 59 viral proteins.
  • Highlighted the need to reinvestigate confidence-scoring software for Orbitrap-Astral data.

Conclusions:

  • The described methodology significantly expedites AP-MS experiments.
  • This advancement enables more powerful and large-scale PPI studies.
  • The approach holds promise for accelerating the discovery of protein interactions.