Abstract
The PHO85 gene is a negative regulator of the PHO system in the yeast Saccharomyces cerevisiae and encodes a protein kinase (Pho85) highly homologous to the Cdc28 kinase (Cdc28). Ten cyclin-like proteins are known to interact with Pho85, and combination with different cyclins is believed to be responsible for distinct Pho85 functions, including phosphate metabolism, carbon source utilization and cell cycle regulation. However, only a limited number of substrates of Pho85 kinase, including Pho4, Gsy2 and Sicl, have so far been identified. To search for more targets of Pho85 and to clarify the genetic control mechanisms by Pho85 kinase in these cellular functions, we carried out a genome-wide analysis of the effect of a pho85Δ mutation on gene expression. We found that expression of various genes involved in carbon metabolism are affected by the mutation and that among them, UGP1 promoter activity was increased in the absence of Pho85 kinase. This increase in the promoter activity was not observed in a pho4Δ mutant or with a mutant UGP1 promoter that is devoid of putative Pho4 and Bas2 binding sites, suggesting that UGP1 expression is modulated by Pho85 through Pho4. We also found that expression of several Pho85-cyclin genes were altered by the carbon source, the growth phase and Pho85 kinase itself.
| Original language | English |
|---|---|
| Pages (from-to) | 239-249 |
| Number of pages | 11 |
| Journal | Yeast |
| Volume | 18 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2001 |
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Keywords
- Carbohydrate metabolism
- Gene expression
- Glycogen
- Growth control
- Saccharomyces cerevisiae
ASJC Scopus subject areas
- Agricultural and Biological Sciences (miscellaneous)
- Biochemistry, Genetics and Molecular Biology(all)
- Biochemistry
- Biotechnology
- Bioengineering
- Microbiology
Cite this
Pho85 kinase, a yeast cyclin-dependent kinase, regulates the expression of UGP1 encoding UDP-glucose pyrophosphorylase. / Nishizawa, Masafumi; Tanabe, Maiko; Yabuki, Nami; Kitada, Kunio; Toh-E, Akio.
In: Yeast, Vol. 18, No. 3, 2001, p. 239-249.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Pho85 kinase, a yeast cyclin-dependent kinase, regulates the expression of UGP1 encoding UDP-glucose pyrophosphorylase
AU - Nishizawa, Masafumi
AU - Tanabe, Maiko
AU - Yabuki, Nami
AU - Kitada, Kunio
AU - Toh-E, Akio
PY - 2001
Y1 - 2001
N2 - The PHO85 gene is a negative regulator of the PHO system in the yeast Saccharomyces cerevisiae and encodes a protein kinase (Pho85) highly homologous to the Cdc28 kinase (Cdc28). Ten cyclin-like proteins are known to interact with Pho85, and combination with different cyclins is believed to be responsible for distinct Pho85 functions, including phosphate metabolism, carbon source utilization and cell cycle regulation. However, only a limited number of substrates of Pho85 kinase, including Pho4, Gsy2 and Sicl, have so far been identified. To search for more targets of Pho85 and to clarify the genetic control mechanisms by Pho85 kinase in these cellular functions, we carried out a genome-wide analysis of the effect of a pho85Δ mutation on gene expression. We found that expression of various genes involved in carbon metabolism are affected by the mutation and that among them, UGP1 promoter activity was increased in the absence of Pho85 kinase. This increase in the promoter activity was not observed in a pho4Δ mutant or with a mutant UGP1 promoter that is devoid of putative Pho4 and Bas2 binding sites, suggesting that UGP1 expression is modulated by Pho85 through Pho4. We also found that expression of several Pho85-cyclin genes were altered by the carbon source, the growth phase and Pho85 kinase itself.
AB - The PHO85 gene is a negative regulator of the PHO system in the yeast Saccharomyces cerevisiae and encodes a protein kinase (Pho85) highly homologous to the Cdc28 kinase (Cdc28). Ten cyclin-like proteins are known to interact with Pho85, and combination with different cyclins is believed to be responsible for distinct Pho85 functions, including phosphate metabolism, carbon source utilization and cell cycle regulation. However, only a limited number of substrates of Pho85 kinase, including Pho4, Gsy2 and Sicl, have so far been identified. To search for more targets of Pho85 and to clarify the genetic control mechanisms by Pho85 kinase in these cellular functions, we carried out a genome-wide analysis of the effect of a pho85Δ mutation on gene expression. We found that expression of various genes involved in carbon metabolism are affected by the mutation and that among them, UGP1 promoter activity was increased in the absence of Pho85 kinase. This increase in the promoter activity was not observed in a pho4Δ mutant or with a mutant UGP1 promoter that is devoid of putative Pho4 and Bas2 binding sites, suggesting that UGP1 expression is modulated by Pho85 through Pho4. We also found that expression of several Pho85-cyclin genes were altered by the carbon source, the growth phase and Pho85 kinase itself.
KW - Carbohydrate metabolism
KW - Gene expression
KW - Glycogen
KW - Growth control
KW - Saccharomyces cerevisiae
UR - http://www.scopus.com/inward/record.url?scp=0035117401&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035117401&partnerID=8YFLogxK
U2 - 10.1002/1097-0061(200102)18:3<239::AID-YEA664>3.0.CO;2-0
DO - 10.1002/1097-0061(200102)18:3<239::AID-YEA664>3.0.CO;2-0
M3 - Article
C2 - 11180457
AN - SCOPUS:0035117401
VL - 18
SP - 239
EP - 249
JO - Yeast
JF - Yeast
SN - 0749-503X
IS - 3
ER -