The human SBDS gene and its yeast ortholog SDO1 encode essential proteins that are involved in ribosome biosynthesis. SDO1 has been implicated in recycling of the ribosomal biogenesis factor Tif6p from pre-66S particles as well as in translation activation of 60S ribosomes. The SBDS protein is highly conserved, containing approximately 250 amino acid residues in animals, fungi and Archaea, while SBDS orthologs of plants and a group of protists contain an extended C-terminal region. In this work, we describe the characterization of the Trypanosoma cruzi SBDS ortholog (TcSBDS). TcSBDS co-fractionates with polysomes in sucrose density gradients, which is consistent with a role in ribosome biosynthesis. We show that TcSBDS contains a C-terminal extension of 200 amino acids that displays the features of intrinsically disordered proteins as determined by proteolytic, circular dichroism and NMR analyses. Interestingly, the C-terminal extension is responsible for TcSBDS-RNA interaction activity in electrophoretic mobility shift assays. This finding suggests that Trypanosomatidae and possibly also other organisms containing SBDS with extended C-terminal regions have evolved an additional function for SBDS in ribosome biogenesis.
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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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