In mammalian cells intracellular transport is inhibited during mitosis. Here we show that in the yeast Saccharomyces cerevisiae secretion continues uninterrupted during mitosis. S. cerevisiae cells were arrested in mitosis by treating wild-type cells with the microtubule-inhibitor nocodazole, or by incubating a temperature-sensitive cell division cycle mutant (cdc16) at the restrictive temperature. Secretion of invertase into the periplasmic space was equally efficient in mitotic and in unsynchronized cells. Electron microscopy of nocodazole-treated mitotic wild-type cells revealed stretches of rough endoplasmic reticulum, strongly fenestrated Golgi cisternae and clusters of vesicles with the diameter of 30-90 nm. Secretion of invertase was inhibited in mitotic sec7 cells at the restrictive temperature, but continued at the permissive temperature. Sec7 is a mutant strain where intracellular traffic is blocked in unsynchronized cells in the Golgi complex at the restrictive temperature. Thus, the elements of the mitotic Golgi complex appear to be able to support intracellular traffic.
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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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