Molecular and General Genetics MGG

, Volume 246, Issue 3, pp 367–373

Identification and characterization of regulatory elements in the phosphoenolpyruvate carboxykinase gene PCK1 of Saccharomyces cerevisiae

  • M. Proft
  • D. Grzesitza
Original Paper

Abstract

Phosphoenolpyruvate carboxykinase is a key enzyme in gluconeogenesis. The expression of the PCK1 gene in Saccharomyces cerevisiae is strictly regulated and dependent on the carbon source provided. Two upstream activation sites (UAS1PCK1 and UAS2PCK1) and one upstream repression site (URSPCK1) were localized by detailed deletion analysis. The efficacy of these three promoter elements when separated from each other was confirmed by investigations using heterologous promoter test plasmids. Activation mediated by UAS1PCK1 or UAS2PCK1 did not occur in the presence of glucose, indicating that these elements are essential for glucose derepression. The repressing effect caused by URSPCK1 was much stronger in glucose-grown cells than in ethanol-grown cells.

Key words

Saccharomyces cerevisiae Phosphoenolpyruvate carboxykinase Glucose repression Gluconeogenesis 

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Copyright information

© Springer-Verlag 1995

Authors and Affiliations

  • M. Proft
    • 1
  • D. Grzesitza
    • 1
  1. 1.Institut für MikrobiologieJohann Wolfgang Goethe-UniversitätFrankfurt am MainGermany

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