We have previously shown that the signal sequence of the Saccharomyces cerevisiae vacuolar protein carboxypeptidase Y (CPY) does not function in mammalian cells unless a glycine residue in the central core is replaced by leucine. Additional mutants were constructed to investigate the features of this hydrophobic core (h) region that are important for signal sequence function in mammalian cells. We find that the degree of hydrophobicity of the h region of any particular mutant signal is directly related to the efficiency with which it directs the translocation of CPY. A minimal h region in a functional signal appears to consist of five hydrophobic residues interrupted by 1 glycine. Analysis of potential secondary structures suggests that a functional mutant signal is more likely than the nonfunctional CPY signal to adopt either a beta strand or an alpha-helical conformation.
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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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