Current Genetics

, Volume 23, Issue 5–6, pp 375–381

Structure and regulation of the isocitrate lyase gene ICL1 from the yeast Saccharomyces cerevisiae

  • A. Schöler
  • H. -J. Schüller
Original Articles
  • 169 Downloads

Abstract

The ICL1 gene encoding the isocitrate lyase from Saccharomyces cerevisiae was cloned and sequenced. A reading frame of 557 amino acids showing significant similarity to isocitrate lyases from seven other species could be identified. Construction of icl1 null mutants led to growth defects on C2 carbon sources while utilization of sugars or C3 substrates remained unaffected. Using an ICL1-lacZ fusion integrated at the ICL1 locus, a more than 200-fold induction of β-galactosidase activity was observed after growth on ethanol when compared with glucose-repressed conditions. A preliminary analysis of the ICL1 upstream region identified a 364-bp fragment necessary and sufficient for this regulatory phenotype. Sequence motifs also present in the upstream regions of co-regulated genes were found within this region.

Key words

Saccharomyces cerevisiae Isocitrate lyase Gene regulation Ethanol induction 

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Copyright information

© Springer-Verlag 1993

Authors and Affiliations

  • A. Schöler
    • 1
  • H. -J. Schüller
    • 1
  1. 1.Institut für Mikrobiologie und BiochemieErlangenGermany

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