The comparison of the amino acid sequences of four yeast transport proteins indicates that there is a questionable relatedness between the uracil permease (FUR4) and the purine-cytosine permease (FCY2), whereas the arginine permease (CAN1) and the histidine permease (HIP1) clearly originated from a common molecular ancestor. The analysis of the primary structure of these transport proteins by two methods of secondary structure predictions suggests the presence of 9-12 membrane-spanning alpha-helices in each polypeptide chain. These results are concordant in that 90% of the alpha-helices were determined by both methods to be at the same positions. In the aligned sequences HIP1 and CAN1, the postulated membrane-spanning alpha-helices often start at corresponding sites, even though the overall sequence similarity of the two proteins is only 30%. In the aligned DNA coding sequences of CAN1 and HIP1, synonymous nucleotide substitutions occur with very similar frequencies in regions where the replacement substitution (changing the amino acids) frequencies are widely different. Moreover, our data suggest that the replacement substitutions can be considered as neutral in the N-terminal segment, whereas the other regions are subject to a conservative selective pressure because, if compared to a random drift, the replacement substitutions are underrepresented.
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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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