Fungi appear to be unique in their requirement for a third soluble translation elongation factor. This factor, designated elongation factor 3 (EF-3), was first described in the yeast Saccharomyces cerevisiae and has subsequently been identified in a wide range of fungal species including Candida albicans and Schizosaccharomyces pombe. EF-3 exhibits ribosome-dependent ATPase and GTPase activities that are not intrinsic to the fungal ribosome, but which are essential for translation elongation. Recent studies on the structure of EF-3 from several fungal species have shown that it consists of a repeated domain, with each domain containing the expected putative ATP- and GTP-binding motifs. Overall, EF-3 shows striking amino acid similarity to members of the ATP-binding Cassette (ABC) family of membrane-associated transport proteins although EF-3 is not itself directly membrane-associated. Regions of the EF-3 polypeptide also show structural homology with other translation-associated factors including aminoacyl-tRNA synthetases and the Escherichia coli ribosomal protein S5. While the precise role of EF-3 in the translation elongation cycle remains to be defined, recent evidence suggests that it may be involved in optimizing accuracy during mRNA decoding at the ribosomal A site. Furthermore, the essential nature of EF-3 with respect to the fungal cell indicates that it may be an effective antifungal target. Its apparently ubiquitous occurrence throughout the fungal kingdom also suggests that it may be a useful fungal taxonomic marker.
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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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