The modular structure of splicing factor SF1 is conserved from yeast to man and SF1 acts at early stages of spliceosome assembly in both organisms. The hnRNP K homology (KH) domain of human (h) SF1 is the major determinant for RNA binding and is essential for the activity of hSF1 in spliceosome assembly, supporting the view that binding of SF1 to RNA is essential for its function. Sequences N-terminal to the KH domain mediate the interaction between hSF1 and U2AF65, which binds to the polypyrimidine tract upstream of the 3' splice site. Moreover, yeast (y) SF1 interacts with Mud2p, the presumptive U2AF65 homologue in yeast, and the interaction domain is conserved in ySF1. The C-terminal degenerate RRMs in U2AF65 and Mud2p mediate the association with hSF1 and ySF1, respectively. Analysis of chimeric constructs of hSF1 and ySF indicates that the KH domain may serve a similar function in both systems, whereas sequences C-terminal to the KH domain are not exchangeable. Thus, these results argue for hSF1 and ySF1, as well as U2AF65 and Mud2p, being functional homologues.
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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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