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A protein interaction map for cell polarity development.

B L Drees1, B Sundin, E Brazeau

  • 1Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA.

The Journal of Cell Biology
|August 8, 2001
PubMed
Summary

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This summary is machine-generated.

This study mapped protein interactions in yeast cell polarity development, identifying 191 interactions, including 128 novel ones. It uncovered 20 new proteins involved in this crucial cellular process.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Genetics

Background:

  • Cell polarity is fundamental for eukaryotic cell function.
  • Key genes and pathways regulating cell polarity in budding yeast are known.
  • A comprehensive understanding of protein-protein interactions is needed to elucidate coordination mechanisms.

Purpose of the Study:

  • To identify novel protein-protein interactions involved in budding yeast cell polarity development.
  • To uncover new proteins and mechanisms coordinating cell polarity.
  • To build a comprehensive interaction network for cell polarity.

Main Methods:

  • A large-scale yeast two-hybrid experiment was performed.
  • 68 Gal4 DNA-binding domain fusions of known polarity proteins were used as bait.

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  • Approximately 90% of Saccharomyces cerevisiae open reading frames were screened as prey.

    • Main Results:

    • 191 protein-protein interactions were detected, with 128 being previously undescribed.
    • 44 interactions implicated 20 uncharacterized proteins in cell polarity.
    • The interaction network connected Cdc42 and Rho1 pathways with diverse cellular processes.

    Conclusions:

    • A comprehensive map of protein interactions regulating cell polarity was established.
    • New proteins and pathways contributing to cell polarity were identified.
    • The findings reveal an integrated network coordinating cellular components for polarity development.