The Mcm2-7p heterohexamer is the presumed replicative helicase in eukaryotic cells. Each of the six subunits is required for replication. We have purified the six Saccharomyces cerevisiae MCM proteins as recombinant proteins in Escherichia coli and have reconstituted the Mcm2-7p complex from individual subunits. Study of MCM ATPase activity demonstrates that no MCM protein hydrolyzes ATP efficiently. ATP hydrolysis requires a combination of two MCM proteins. The fifteen possible pairwise mixtures of MCM proteins yield only three pairs of MCM proteins that produce ATPase activity. Study of the Mcm3/7p ATPase shows that an essential arginine in Mcm3p is required for hydrolysis of the ATP bound to Mcm7p. Study of the pairwise interactions between MCM proteins connects the remaining MCM proteins to the Mcm3/7p pair. The data predict which subunits in the ATPase pairs bind the ATP that is hydrolyzed and indicate the arrangement of subunits in the Mcm2-7p heterohexamer.
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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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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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