Reference - PMID:9535817 - Isolation and characterization of an invertase and its repressor genes from Schizosaccharomyces pombe.
Reference summary
- PubMed ID
- PMID:9535817
- Title
- Isolation and characterization of an invertase and its repressor genes from Schizosaccharomyces pombe.
- Authors
- Tanaka N, Ohuchi N, Mukai Y, Osaka Y, Ohtani Y, Tabuchi M, Bhuiyan MS, Fukui H, Harashima S, Takegawa K
- Citation
- Biochem Biophys Res Commun 1998 Apr 07;245(1):246-53
- Publication year
- 1998
- Abstract
- PCR was used to isolate an invertase homolog gene from the fission yeast Schizosaccharomyces pombe. The cloned inv1(+) gene encodes a protein of 581 amino acids with 16 potential asparagine-linked glycosylation sites, and has 39% and 38% identity to the Schwanniomyces occidentalis and Saccharomyces cerevisiae SUC2 invertases. When the inv1(+) gene was disrupted, S. pombe strains lacked detectable invertase activity. This result showed that the inv1(+) gene encodes only one active invertase in S. pombe cells. The transcription of inv1(+) is repressed in the presence of glucose. The transcription of inv1(+) was not affected in cyr1Delta strain which lacks adenylate cyclase activity, unlike transcription of S. pombe fbp1(+) gene. We have identified an S. pombe gene (scr1(+)) that encodes a homolog of the Aspergillus nidulans CREA which is required for glucose repression of the glyconeogenic pathway. Although the deletion of scr1(+) did not influence the transcription of fbp1(+) gene, glucose repression of the inv1(+) gene was severely affected. These results showed that glucose repression of inv1(+) gene is dependent on scr1(+) gene, and S. pombe cAMP signalling pathway may not be essential for glucose repression of inv1(+) gene.
