Haploid yeast cells of the a mating type secrete a peptide pheromone, a factor, which acts on cells of the alpha mating type to prepare them for conjugation. We show that the STE3 gene, which is required for mating only by alpha cells and is transcribed only in alpha cells, likely encodes a cell-surface receptor for a factor. This view is based on three findings. First, wild-type Ste3 product is required for response to the pheromone: mutants with any one of five different ste3 mutations are unresponsive to a factor. Second, a hybrid Ste3-beta-galactosidase protein encoded by a STE3-lacZ gene fusion fractionates to the particulate fraction of yeast cell extracts, suggesting that Ste3 is a membrane protein. Finally, the DNA sequence of STE3, which we report here, encodes a protein of 470 amino acid residues that contains seven distinct hydrophobic segments of sufficient length to span a lipid bilayer.
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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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