SUMO is a ubiquitin-related protein that functions as a posttranslational modification on other proteins. SUMO conjugation is essential for viability in Saccharomyces cerevisiae and is required for entry into mitosis. We have found that SUMO is attached to the septins Cdc3, Cdc11, and Shs1/Sep7 specifically during mitosis, with conjugates appearing shortly before anaphase onset and disappearing abruptly at cytokinesis. Septins are components of a belt of 10-nm filaments encircling the yeast bud neck. Intriguingly, only septins on the mother cell side of the bud neck are sumoylated. We have identified four major SUMO attachment-site lysine residues in Cdc3, one in Cdc11, and two in Shs1, all within the consensus sequence (IVL)KX(ED). Mutating these sites eliminated the vast majority of bud neck-associated SUMO, as well as the bulk of total SUMO conjugates in G(2)/M-arrested cells, indicating that sumoylated septins are the most abundant SUMO conjugates at this point in the cell cycle. This mutant has a striking defect in disassembly of septin rings, resulting in accumulation of septin rings marking previous division sites. Thus, SUMO conjugation plays a role in regulating septin ring dynamics during the cell cycle.
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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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Evidence ID | Analyze ID | File | Description |
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