Post-transcriptional regulation of ura4+ gene expression by glucose in Schizosaccharomyces pombe

Mol Cells. 2002 Dec 31;14(3):437-43.

Abstract

Glucose-inducible gene expression is a fundamental cellular response for optimal cell growth, but identities of glucose-inducible genes and its regulatory mechanism remain largely elusive in Schizosaccharomyces pombe. Here we report that ura4+, encoding orotidine monophosphate decarboxylase (OMPdecase), shows glucose-inducible expression regulated at post-transcriptional level. The ura4+ mRNA level was rapidly decreased by approximately 50% within 20 min after glucose depletion and it was readily recovered upon glucose-readdition within 1 h. Glucose at above 2% similarly raised the transcript level of ura4+, while low concentration (0.1%) was not effective. Interestingly, control of mRNA turnover would be the main regulatory step of the glucose-dependent expression of ura4+. Moreover, stress-activated MAPK (SAPK) pathway was partially responsible for the glucose-regulated expression of ura4+ and rrg1+, another example of glucose-dependent mRNA stability control in S. pombe. These results suggest that the SAPK pathway might participate in the glucose-dependent regulation of ura4+ and rrg1+ mRNA stabilities.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Blotting, Northern
  • Fungal Proteins / genetics*
  • Fungal Proteins / metabolism
  • Gene Expression Regulation / drug effects*
  • Gene Expression Regulation, Fungal
  • Glucose / pharmacology*
  • Mitogen-Activated Protein Kinases / drug effects
  • RNA Processing, Post-Transcriptional*
  • RNA Stability*
  • RNA, Fungal / metabolism
  • RNA, Messenger / metabolism
  • Regulatory Sequences, Nucleic Acid
  • Schizosaccharomyces / drug effects*
  • Schizosaccharomyces / metabolism
  • Schizosaccharomyces pombe Proteins / genetics*
  • Schizosaccharomyces pombe Proteins / metabolism

Substances

  • Fungal Proteins
  • RNA, Fungal
  • RNA, Messenger
  • RRG1 protein, S pombe
  • Schizosaccharomyces pombe Proteins
  • ura4 protein, S pombe
  • Mitogen-Activated Protein Kinases
  • Glucose