We identify Osh3p, one of seven yeast oxysterol-binding protein (OSBP) homologs, by its protein-protein interactions with a DEAD-box RNA helicase, Rok1p. The ROK1 gene was initially identified by its ability on a high-copy number plasmid to suppress the nuclear fusion defect caused by the kem1 null mutation. Our results show that OSH3 also affects nuclear fusion in a kem1-specific manner; the nuclear fusion defect of kem1 was intensified by the multicopy expression of OSH3. The Osh3p synthesis was highly induced by alpha-mating pheromone. We also found that OSH3 overexpression promoted filamentation growth of the Sigma1278b wild-type strain and suppressed the filamentation growth defect of the ste12 mutation. These results lead us to a new understanding of cellular functions of the yeast OSBPs.
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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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