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High-Throughput Proteomics Enabled by a Photocleavable Surfactant.

Kyle A Brown1, Trisha Tucholski1, Christian Eken1

  • 1Department of Chemistry, University of Wisconsin-Madison, Madison, WI, 53706, USA.

Angewandte Chemie (International Ed. in English)
|February 26, 2020
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Summary

A novel photocleavable surfactant, 4-hexylphenylazosulfonate (Azo), accelerates protein digestion for mass spectrometry (MS) proteomics. This method enhances high-throughput analysis, including for integral membrane proteins, improving clinical applications.

Keywords:
high-throughput proteomicsmass spectrometrymembrane proteinsphotocleavable surfactants

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Area of Science:

  • Proteomics
  • Analytical Chemistry
  • Biochemistry

Background:

  • Mass spectrometry (MS)-based proteomics is crucial for understanding protein function.
  • Protein solubility and sample preparation are significant bottlenecks for high-throughput proteomics.
  • Integral membrane proteins are vital drug targets but are underrepresented in proteomic studies.

Purpose of the Study:

  • To develop a high-throughput bottom-up proteomic method using a novel MS-compatible photocleavable surfactant.
  • To streamline sample preparation for both bottom-up and top-down proteomics.
  • To improve the analysis of challenging protein types, such as integral membrane proteins.

Main Methods:

  • A new MS-compatible photocleavable surfactant, 4-hexylphenylazosulfonate (Azo), was synthesized and utilized.
  • Azo facilitated rapid protein extraction and enzymatic digestion (30 minutes).
  • UV degradation was employed for subsequent MS analysis, and workflows for integral membrane proteins were developed.

Main Results:

  • The Azo surfactant enabled robust protein extraction and significantly reduced digestion time.
  • An efficient method for analyzing integral membrane proteins using Azo was established.
  • The Azo surfactant demonstrated versatility as an 'all-in-one' solution for both top-down and bottom-up proteomics.

Conclusions:

  • The Azo-aided method provides a streamlined and high-throughput approach for MS-based proteomics.
  • This technique overcomes previous limitations in protein sample preparation, particularly for integral membrane proteins.
  • The developed workflows are amenable to clinical applications, advancing proteomic research and diagnostics.