A eukaryotic cell must coordinate DNA synthesis and chromosomal segregation to generate a faithful replica of itself. These events are confined to discrete periods designated synthesis (S) and mitosis (M), and are separated by two gap periods (Gl and G2). A complete proliferative cycle entails sequential and regulated progression through G1, S, G2, and M phases. During G1, cells receive information from the extracellular environment and determine whether to proliferate or to adopt an alternate fate. Work in yeast and cultured mammalian cells has implicated cyclin dependent kinases (Cdks) and their cyclin regulatory partners as key components controlling G1. Unique cyclin/Cdk complexes are temporally expressed in response to extracellular signaling, whereupon they phosphorylate specific targets to promote ordered G1 progression and S phase entry. Cyclins and Cdks are thought to be required and rate-limiting for cell proliferation because manipulating their activity in yeast and cultured mammalian cells alters G1 progression. However, recent evidence suggests that these same components are not necessarily required in developing mouse embryos or cells derived from them. The implications of these intriguing observations for understanding G1 progression and its regulation are discussed.
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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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Increase the total number of rows showing on this page by using the pull-down located below the table, or use the page scroll at the table's top right to browse through the table's pages; use the arrows to the right of a column header to sort by that column; filter the table using the "Filter" box at the top of the table; click on the small "i" buttons located within a cell for an annotation to view further details about experiment type and any other genes involved in the interaction.
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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