We have isolated and sequenced a yeast gene encoding a protein (Mr 24,875) very rich in serine (SRP) and alanine residues that accounted for 25% and 20% of the total amino acids, respectively. The SRP1 gene is highly expressed in culture conditions leading to glucose repression (Marguet & Lauquin, 1986), the amount of SRP1 mRNA representing about 1 to 2% of total poly(A)+ RNA. A repetitive structure of eight direct tandem repeats 36-base long, also reflected in the amino acid sequence, was found in the second half of the open reading frame. The consensus amino acid sequence of the repeat was Ser-Ser-Ser-Ala-Ala-Pro-Ser-Ser-Ser-Glu-Ala-Lys. Replacing the genomic copy of the cloned gene with a disrupted SRP1 gene indicated that the SRP1 gene was not essential for viability in yeast, but several SRP1-homologous sequences were found within the yeast genome, raising the possibility that the disrupted SRP1 gene is rescued by one of the other SRP-homologous sequences. Complete separation of yeast chromosomes by contour-clamped homogeneous field electrophoresis indicated that, apart from chromosome V, which carries the SRP1 gene, 12 chromosomes have SRP-related sequences with various degrees of homology. These sequences were located on chromosomes XV, VII and XI under stringent conditions of hybridization (tm -20 degrees C), and observed on chromosomes I, II, III, IV, VI, VIII, X, XI and XII, only under low-stringency conditions (tm -40 degrees C). Northern blot analysis of both the wild type and SRP1-disrupted strains indicated that along with SRP1 at least one more member of the SRP family was transcribed to a 0.7 kb (1 kb = 10(3) bases) polyadenylated RNA species clearly distinct from the SRP1-specific mRNA (1 kb long). Analyses of the SRP1 repeat domain suggested a model for the divergent evolution of the repeats in the SRP1 sequence.
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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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