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Related Experiment Videos

Proximity-dependent labeling methods for proteomic profiling in living cells.

Chiao-Lin Chen1, Norbert Perrimon1,2

  • 1Department of Genetics, Harvard Medical School, Boston, MA, USA.

Wiley Interdisciplinary Reviews. Developmental Biology
|April 8, 2017
PubMed
Summary

Proximity labeling coupled with mass spectrometry (MS) analyzes spatially restricted proteomes in living cells. This review compares methods for understanding cellular organization and protein interactions.

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Area of Science:

  • Cellular Biology
  • Proteomics
  • Molecular Biology

Background:

  • Understanding cellular organization and protein interactions is crucial for deciphering biological processes.
  • Spatially restricted proteome analysis provides insights into subcellular localization and protein networks.
  • Proximity labeling methods offer a high-throughput approach for mapping cellular proteomes.

Purpose of the Study:

  • To review and compare current proximity labeling techniques for proteomic analysis.
  • To highlight the applications of proximity labeling in studying cellular organization and protein interactions.
  • To guide researchers in selecting appropriate proximity labeling methods for specific biological questions.

Main Methods:

  • Proximity labeling utilizes enzymes to generate reactive radicals, tagging neighboring proteins with biotin.

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  • Biotinylated proteins are isolated and analyzed using mass spectrometry (MS).
  • Enzyme fusion with specific proteins or signal peptides enables spatial targeting to subcellular regions.

    • Main Results:

    • Proximity labeling has provided significant insights into various biological processes.
    • Different proximity labeling methods possess unique features suitable for diverse applications.
    • Systematic analysis of spatially restricted proteomes is achievable through these techniques.

    Conclusions:

    • Proximity labeling coupled with MS is a powerful tool for high-throughput proteomic analysis.
    • The choice of proximity labeling method depends on the specific biological question being addressed.
    • These techniques are instrumental in advancing our understanding of cellular organization and protein interactomes.