A split-EGFP bimolecular fluorescence complementation assay was used to visualise and locate three interacting pairs of proteins from the GAL genetic switch of the budding yeast, Saccharomyces cerevisiae. Both the Gal4p-Gal80p and Gal80p-Gal3p pairs were found to be located in the nucleus under inducing conditions. However, the Gal80p-Gal1p complex was located throughout the cell. These results support recent work establishing an initial interaction between Gal3p and Gal80p occurring in the nucleus. Labelling of all three protein pairs impaired the growth of the yeast strains and resulted in reduced galactokinase activity in cell extracts. The most likely cause of this impairment is decreased dissociation rates of the complexes, caused by the essentially irreversible reassembly of the EGFP fragments. This suggests that a fully functional GAL genetic switch requires dynamic interactions between the protein components. These results also highlight the need for caution in the interpretation of in vivo split-EGFP experiments.
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| 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 |
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| Evidence ID | Analyze ID | Gene | Gene Systematic Name | Phenotype | Experiment Type | Experiment Type Category | Mutant Information | Strain Background | Chemical | Details | Reference |
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| Evidence ID | Analyze ID | Gene | Gene Systematic Name | Disease Ontology Term | Disease Ontology Term ID | Qualifier | Evidence | Method | Source | Assigned On | Reference |
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| 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 |
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| Site | Modification | Modifier | Source | Reference |
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| Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Allele | Assay | Annotation | Action | Phenotype | SGA score | P-value | Source | Reference | Note |
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| Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Assay | Annotation | Action | Modification | Source | Reference | Note |
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| Complement ID | Locus ID | Gene | Species | Gene ID | Strain background | Direction | Details | Source | Reference |
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| Evidence ID | Analyze ID | Dataset | Description | Keywords | Number of Conditions | Reference |
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