The Mex67p protein, together with Mtr2p, functions as the mRNA export receptor in Saccharomyces cerevisiae by interacting with both mRNA and nuclear pore complexes. To identify genes that interact functionally with MEX67, we used transposon insertion to search for mutations that suppressed the temperature-sensitive mex67-5 allele. Four suppressors are described here. The screen revealed that mutant Mex67-5p, but not wild-type Mex67p, is a target of the nuclear protein quality control mediated by San1p, a ubiquitin-protein ligase that participates in degradation of aberrant chromatin-associated proteins. Our finding that overexpression of the SPT6 gene alleviates the growth defects of the mex67-5 strain, together with the impairment of poly(A)(+) RNA export caused by depletion of Spt6p or the related protein Iws1p/Spn1p, supports the mechanism proposed in mammalian cells for Spt6-mediated co-transcriptional loading of mRNA export factors during transcription elongation. Finally, our results also uncovered genetic connections between Mex67p and the poly(A) nuclease complex and with components of chromatin boundary elements.
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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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Evidence ID | Analyze ID | File | Description |
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