The complex eukaryotic initiation factor 3 (eIF3) was shown to promote the formation of the 43 S preinitiation complex by dissociating 40 S and 60 S ribosomal subunits, stabilizing the ternary complex, and aiding mRNA binding to 40 S ribosomal subunits. Recently, we described the identification of RPG1 (TIF32), the p110 subunit of the eIF3 core complex in yeast. In a screen for Saccharomyces cerevisiae multicopy suppressors of the rpg1-1 temperature-sensitive mutant, an unknown gene corresponding to the open reading frame YLR192C was identified. When overexpressed, the 30-kDa gene product, named Hcr1p, was able to support, under restrictive conditions, growth of the rpg1-1 temperature-sensitive mutant, but not of a Rpg1p-depleted mutant. An hcr1 null mutant was viable, but showed slight reduction of growth when compared with the wild-type strain. Physical interaction between the Hcr1 and Rpg1 proteins was shown by co-immunoprecipitation analysis. The combination of Deltahcr1 and rpg1-1 mutations resulted in a synthetic enhancement of the slow growth phenotype at a semipermissive temperature. In a computer search, a significant homology to the human p35 subunit of the eIF3 complex was found. We assume that the yeast Hcr1 protein participates in translation initiation likely as a protein associated with the eIF3 complex.
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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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