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Related Experiment Videos

Yeast desaturases.

C E Martin1, C-S Oh, P Kandasamy

  • 1Department of Cell Biology and Neuroscience, Bureau of Biological Research, Rutgers University, Nelson Laboratories, 604 Allison Road, Piscataway, NJ 08854, USA. martin@biology.rutgers.edu

Biochemical Society Transactions
|November 21, 2002
PubMed
Summary
This summary is machine-generated.

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Regulation of Saccharomyces OLE1 gene expression involves nutrient fatty acids and oxygen levels. Key proteins Spt23p and Mga2p control OLE1 transcription and mRNA stability, impacting fatty acid desaturation.

Area of Science:

  • Molecular Biology
  • Yeast Genetics
  • Gene Regulation

Background:

  • The Saccharomyces OLE1 gene encodes Delta-9 fatty acid desaturase, crucial for membrane function.
  • OLE1 expression is tightly regulated by nutrient fatty acids and oxygen availability.
  • This regulation occurs at both transcriptional and mRNA stability levels.

Purpose of the Study:

  • To elucidate the regulatory mechanisms governing OLE1 gene expression in Saccharomyces.
  • To investigate the roles of Spt23p and Mga2p in OLE1 transcription and mRNA stability.
  • To understand the interplay between oxygen levels, fatty acids, and OLE1 regulation.

Main Methods:

  • Analysis of OLE1 promoter elements (FAR and LORE) and their response to stimuli.
  • Investigation of mRNA stability under varying nutrient and oxygen conditions.

Related Experiment Videos

  • Characterization of Spt23p and Mga2p function, including their processing and impact on OLE1 expression.

    • Main Results:

    • OLE1 transcription is controlled by FAR and LORE elements, with unsaturated fatty acids repressing activation.
    • Unsaturated fatty acids also decrease OLE1 mRNA half-life.
    • Spt23p and Mga2p regulate OLE1 expression via ubiquitin-mediated processing; Mga2p is vital for hypoxia-induced transcription and mRNA stability.

    Conclusions:

    • Spt23p and Mga2p are key regulators of OLE1 gene expression in Saccharomyces.
    • Mga2p plays a dual role in OLE1 transcription and mRNA stability, suggesting a functional link.
    • Understanding OLE1 regulation provides insights into cellular adaptation to nutrient and oxygen fluctuations.