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Glycoprotein biosynthesis in yeast

A Herscovics1, P Orlean

  • 1McGill Cancer Centre, McGill University, Montreal, Quebec, Canada.

FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology
|April 1, 1993
PubMed
Summary

This study explores protein glycosylation in yeast (Saccharomyces cerevisiae), focusing on N-linked and O-linked modifications and glycosylphosphatidylinositol anchors. Yeast glycosylation mutants aid in understanding conserved eukaryotic pathways and identifying essential genes.

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Area of Science:

  • Biochemistry and Molecular Biology
  • Cell Biology
  • Yeast Genetics

Background:

  • Proteins in Saccharomyces cerevisiae undergo N-linked glycosylation, O-linked mannose glycosylation, and glycosylphosphatidylinositol (GPI) anchor attachment.
  • These crucial protein modifications are intrinsically linked to the secretory pathway.
  • Early steps in N-linked glycosylation and GPI anchor formation are evolutionarily conserved across eukaryotes.

Purpose of the Study:

  • To investigate the conserved mechanisms of protein glycosylation in yeast.
  • To utilize yeast as a model system for studying glycosylation pathways relevant to other eukaryotes.
  • To identify genes and enzymes involved in yeast glycosylation.

Main Methods:

  • Employing genetic and molecular biology approaches in Saccharomyces cerevisiae.

Related Experiment Videos

  • Isolation and characterization of yeast glycosylation mutants.
  • Analysis of genes encoding enzymes critical for glycosylation.

    • Main Results:

    • Yeast mutants have been instrumental in identifying biosynthetic intermediates.
    • The essentiality of specific glycosylation enzymes for yeast viability has been determined.
    • Cellular functions affected by perturbed glycosylation pathways have been elucidated.

    Conclusions:

    • Yeast glycosylation mutants and genes provide valuable insights into conserved eukaryotic processes.
    • Studies in yeast facilitate the identification of homologous genes and pathways in other organisms.
    • Understanding yeast glycosylation is key to deciphering fundamental biological mechanisms across eukaryotes.