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ALG gene expression and cell cycle progression

M A Kukuruzinska1, K Lennon-Hopkins

  • 1Department of Molecular and Cell Biology, School of Dental Medicine, and Department of Biochemistry, School of Medicine, Boston University Medical Center, Boston, MA 02118, USA. mkukuruz@bu.edu

Biochimica Et Biophysica Acta
|January 8, 1999
PubMed
Summary

The ALG genes, crucial for protein N-glycosylation, are regulated during cell cycle transitions. Selective downregulation of ALG7 controls cell cycle withdrawal, suggesting conserved roles in mammals.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cell Biology

Background:

  • The ALG genes are essential for the dolichol pathway, a key process in protein N-glycosylation.
  • Evidence indicates ALG genes play a significant role in regulating the cell cycle.
  • In yeast, ALG gene expression is coordinated and responds to growth stimulation, similar to mammalian early growth response genes.

Purpose of the Study:

  • To investigate the role of ALG genes in cell cycle regulation.
  • To understand the specific function of ALG7 in response to antimitogenic signals and cell cycle arrest.
  • To explore the conserved function of ALG genes in eukaryotic cell proliferation and differentiation.

Main Methods:

  • Analysis of ALG gene expression in Saccharomyces cerevisiae.

Related Experiment Videos

  • Study of ALG7 regulation in response to antimitogenic cues.
  • Investigation of functional relationships between ALG gene expression and cell cycle phases using mutants.

    • Main Results:

    • Coordinate regulation of ALG genes constitutes the primary genomic response to growth stimulation in yeast.
    • Downregulation of ALG7, the first gene in the dolichol pathway, is associated with cell cycle arrest and differentiation.
    • ALG7 expression is linked to cell cycle arrest and G1 cyclins have been identified as downstream targets.

    Conclusions:

    • Selective inhibition of ALG7 is sufficient to regulate the dolichol pathway for cell cycle withdrawal.
    • The functions of ALG genes are conserved across eukaryotes, implying similar roles in mammalian cell proliferation and differentiation.
    • Understanding ALG gene regulation provides insights into molecular control mechanisms governing cell cycle progression and exit.