Recognition of the cap structure at the 5' end of mRNA is one of the first events in initiation of eukaryotic translation. This step is mediated by the translation initiation factor 4F (eIF-4F). In mammalian cells this factor is composed of the cap-binding protein eIF-4E, eIF-4A, and a 220-kDa polypeptide. In yeast Saccharomyces cerevisiae, eIF-4E is found associated with a 150-kDa protein (p150) and a 20-kDa protein (p20). The resulting protein complex is proposed to represent yeast eIF-4F. To study the functions of p150 and p20 and their interaction with eIF-4E, we disrupted the genes encoding p150 and p20 and analyzed the effects on protein complex formation and cell viability. Yeast cells with single and double disruptions of the genes encoding p150 and p20 are viable, but p150 single and p150/p20 double disruptions show a slow growth phenotype. Gel chromatography and immunoadsorption experiments with a monoclonal anti-eIF-4E antibody coupled to protein G-Sepharose show that both p150 and p20 bind independently of each other to eIF-4E.
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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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