Protein P0 interacts with proteins P1alpha, P1beta, P2alpha, and P2beta, and forms the Saccharomyces cerevisiae ribosomal stalk. The capacity of RPP0 genes from Aspergillus fumigatus, Dictyostelium discoideum, Rattus norvegicus, Homo sapiens, and Leishmania infantum to complement the absence of the homologous gene has been tested. In S. cerevisiae W303dGP0, a strain containing standard amounts of the four P1/P2 protein types, all heterologous genes were functional except the one from L. infantum, some of them inducing an osmosensitive phenotype at 37 degrees C. The polymerizing activity and the elongation factor-dependent functions but not the peptide bond formation capacity is affected in the heterologous P0 containing ribosomes. The heterologous P0 proteins bind to the yeast ribosomes but the composition of the ribosomal stalk is altered. Only proteins P1alpha and P2beta are found in ribosomes carrying the A. fumigatus, R. norvegicus, and H. sapiens proteins. When the heterologous genes are expressed in a conditional null-P0 mutant whose ribosomes are totally deprived of P1/P2 proteins, none of the heterologous P0 proteins complemented the conditional phenotype. In contrast, chimeric P0 proteins made of different amino-terminal fragments from mammalian origin and the complementary carboxyl-terminal fragments from yeast allow W303dGP0 and D67dGP0 growth at restrictive conditions. These results indicate that while the P0 protein RNA-binding domain is functionally conserved in eukaryotes, the regions involved in protein-protein interactions with either the other stalk proteins or the elongation factors have notably evolved.
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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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