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Biofunctionalized dissolvable hydrogel microbeads enable efficient characterization of native protein complexes.

Xinyang Shao1,2, Meng Tian3,4, Junlong Yin3

  • 1Institute of Chemical Biology, Shenzhen Bay Laboratory, Shenzhen, China.

Nature Communications
|October 4, 2024
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Summary

We developed SNAP-MS, a novel method for highly efficient protein complex purification and characterization from low-input samples. This technique enables rapid, accurate analysis of native protein complexes using mass spectrometry.

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Area of Science:

  • Biochemistry
  • Proteomics
  • Molecular Biology

Background:

  • Protein complex characterization is crucial for understanding biological processes.
  • Analyzing low-input samples and non-covalent complexes remains challenging.
  • Existing methods struggle with efficiency and accuracy for complex biochemical compositions.

Purpose of the Study:

  • To introduce SNAP-MS (Stationary-phase-dissolvable Native Affinity Purification and Mass Spectrometric characterization).
  • To enable highly efficient purification and characterization of protein complexes from low-input samples (pico-mole level).
  • To provide a rapid and accurate method for native mass spectrometry analysis.

Main Methods:

  • Developed SNAP-MS, a strategy involving stationary-phase dissolving for target recovery.
  • Utilized high-affinity bait-target pairs for efficient capture.
  • Integrated native mass spectrometry (MS) for structural and compositional analysis.
  • Employed an algorithm for charge removal and mass correction in MS analysis.

Main Results:

  • Achieved highly efficient purification and characterization from pico-mole level inputs.
  • Enabled native MS analysis of intact protein complexes, revealing stoichiometry, topology, and proteoform distribution.
  • Demonstrated enhanced accuracy for heterogeneously glycosylated complexes.
  • Reduced sample-to-data acquisition time to as little as 2 hours.

Conclusions:

  • SNAP-MS offers a versatile and efficient solution for characterizing native protein complexes.
  • The method is suitable for low-input biological samples, including blood.
  • SNAP-MS significantly advances the ability to study complex biological mechanisms through protein interaction analysis.