In Saccharomyces cerevisiae cAMP-dependent protein kinase (cAPK) is involved in nutrient sensing and growth regulation via the Ras/cAMP pathway. Target enzymes, e.g. neutral trehalase, are activated or inactivated rapidly by cAPK-mediated phosphorylation. In addition, stress-induced transcription of genes of the general stress-response, e.g. HSP12, is negatively regulated via cAPK. We have investigated the effect of low cAPK activity on the stress-induced expression of neutral trehalase Nth1p. For this purpose we used mutants (tpk1tpk2TPK3, tpk1TPK2tpk3 and TPK1tpk2tpk3) with double knockouts of the three TPK genes encoding catalytic subunits of cAPK. It is shown that the tpk1tpk2TPK3 mutant, which has very low cAPK activity, exhibits a heat-stress-induced inactivation of neutral trehalase that is not observed in tpk1TPK2tpk3, TPK1tpk2tpk3 mutants and wild-type cells. However, heat stress induces an increase in NTH1 mRNA in the tpk1tpk2TPK3 mutant. Introduction of a plasmid carrying the TPK1 or TPK2 gene into tpk1tpk2TPK3 cells restores the heat-induced increase of neutral trehalase activity. In vitro and in vivo results suggest that the heat induced inactivation of neutral trehalase is due to a reversible inactivation of Nth1p. Our data indicate that a certain level of phosphorylation is essential for maintenance of neutral trehalase activity during heat shock in S. cerevisiae. Two identical putative cAPK phosphorylation sites have been found in the sequence predicted for the Nth1p. Stabilization and activation of neutral trehalase may be regulated by these sites. Furthermore, our data suggest that the heat-stress-induced transcription of the NTH1 gene is not negatively regulated by cAPK, that the TPK genes have no effect on the glucose repression of the NTH1 gene, and that non-detectable neutral trehalase activity in derepressed tpk1tpk2TPK3 cells is correlated with the reduced thermotolerance observed in this strain, similar to the heat-shock-recovery defect reported for the nth1delta mutant.
Increase the total number of rows showing on this page using the pull-down located below the table, or use the page scroll at the table's top right to browse through the table's pages; use the arrows to the right of a column header to sort by that column; filter the table using the "Filter" box at the top of the table.
Evidence ID | Analyze ID | Gene/Complex | Systematic Name/Complex Accession | Qualifier | Gene Ontology Term ID | Gene Ontology Term | Aspect | Annotation Extension | Evidence | Method | Source | Assigned On | Reference |
---|
Increase the total number of rows showing on this page using the pull-down located below the table, or use the page scroll at the table's top right to browse through the table's pages; use the arrows to the right of a column header to sort by that column; filter the table using the "Filter" box at the top of the table; click on the small "i" buttons located within a cell for an annotation to view further details.
Evidence ID | Analyze ID | Gene | Gene Systematic Name | Phenotype | Experiment Type | Experiment Type Category | Mutant Information | Strain Background | Chemical | Details | Reference |
---|
Increase the total number of rows showing on this page using the pull-down located below the table, or use the page scroll at the table's top right to browse through the table's pages; use the arrows to the right of a column header to sort by that column; filter the table using the "Filter" box at the top of the table.
Evidence ID | Analyze ID | Gene | Gene Systematic Name | Disease Ontology Term | Disease Ontology Term ID | Qualifier | Evidence | Method | Source | Assigned On | Reference |
---|
Increase the total number of rows displayed on this page using the pull-down located below the table, or use the page scroll at the table's top right to browse through the table's pages; use the arrows to the right of a column header to sort by that column; to filter the table by a specific experiment type, type a keyword into the Filter box (for example, “microarray”); download this table as a .txt file using the Download button or click Analyze to further view and analyze the list of target genes using GO Term Finder, GO Slim Mapper, SPELL, or YeastMine.
Evidence ID | Analyze ID | Regulator | Regulator Systematic Name | Target | Target Systematic Name | Direction | Regulation of | Happens During | Regulator Type | Direction | Regulation Of | Happens During | Method | Evidence | Strain Background | Reference |
---|
Increase the total number of rows showing on this page by using the pull-down located below the table, or use the page scroll at the table's top right to browse through its pages; use the arrows to the right of a column header to sort by that column; filter the table using the "Filter" box at the top of the table.
Site | Modification | Modifier | Source | Reference |
---|
Increase the total number of rows showing on this page by using the pull-down located below the table, or use the page scroll at the table's top right to browse through the table's pages; use the arrows to the right of a column header to sort by that column; filter the table using the "Filter" box at the top of the table; click on the small "i" buttons located within a cell for an annotation to view further details about experiment type and any other genes involved in the interaction.
Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Allele | Assay | Annotation | Action | Phenotype | SGA score | P-value | Source | Reference | Note |
---|
Increase the total number of rows showing on this page by using the pull-down located below the table, or use the page scroll at the table's top right to browse through the table's pages; use the arrows to the right of a column header to sort by that column; filter the table using the "Filter" box at the top of the table; click on the small "i" buttons located within a cell for an annotation to view further details about experiment type and any other genes involved in the interaction.
Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Assay | Annotation | Action | Modification | Source | Reference | Note |
---|
Increase the total number of rows showing on this page by using the pull-down located below the table, or use the page scroll at the table's top right to browse through its pages; use the arrows to the right of a column header to sort by that column; filter the table using the "Filter" box at the top of the table.
Complement ID | Locus ID | Gene | Species | Gene ID | Strain background | Direction | Details | Source | Reference |
---|
Increase the total number of rows displayed on this page using the pull-down located below the table, or use the page scroll at the table's top right to browse through the table's pages; use the arrows to the right of a column header to sort by that column; filter the table using the "Filter" box at the top of the table; download this table as a .txt file using the Download button;
Evidence ID | Analyze ID | Dataset | Description | Keywords | Number of Conditions | Reference |
---|