A large number of proteins involved in the biogenesis of yeast endosomes and vacuoles have been identified based on screens that scored for inactivation of proteins. Such screens may, however, miss important regulators of the pathway. Here, we present a visual screen in which we examined the effects on vacuole morphology if any of the 6153 yeast open reading frames was overexpressed. Using a progressive screening procedure, we could identify a total of 53 genes. Among the most striking endosomal proteins are the CORVET/HOPS subunits Vps3, Vps18 and Vps39 and the putative tethering inhibitor Ivy1. Furthermore, six endosomal sorting complex related to transport (ESCRT) proteins led to altered vacuole morphology if overproduced. Among the novel proteins, we identify Yer128w as an endosomal protein that interacts with the AAA-ATPase Vps4, and therefore named it Vfa1 (Vps Four-Associated 1). We present evidence on the possible role of these novel proteins in trafficking to the vacuole. Our data provide novel insights into the regulation of protein trafficking.
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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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