The Dpb11 and Drc1/Sld2 proteins form a complex that is critical for the initiation of DNA replication. In this study we identify MSA1 as a high copy suppressor of a drc1-1 mutant. MSA1 overproduction can also suppress the temperature sensitivity of dpb11-1 and pol2-12 mutants. Reciprocally, msa1 deletion exacerbates the mutant phenotypes of both drc1/sld2 and dpb11 mutants and msa1 deletion alone results in a delay in S phase entry of synchronous cells indicating a positive role for MSA1 in DNA replication. Paradoxically, MSA1 overproduction is deleterious to cdc6-1, cdc7-1, cdc28-1N and cdc14-1 mutants indicating a complex relationship with DNA replication and cell cycle regulatory genes. The Msa1 protein is tightly cell cycle regulated. Msa1 and its paralog, Msa2, both accumulate in highly modified forms just as cells commit to enter S phase and then are rapidly destroyed. MSA1 represents a new cell cycle regulated gene important for S phase entry.
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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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