The key gluconeogenic enzyme fructose-1,6-bisphosphatase (FBPase) is targeted to Vid vesicles when glucose-starved cells are replenished with glucose. Vid vesicles then deliver FBPase to the vacuole for degradation. A modified alkaline phosphatase assay was developed to study the trafficking of Vid vesicles to the vacuole. For this assay, FBPase was fused with a truncated form of alkaline phosphatase. Under in vivo conditions, FBPase-delta60Pho8p was targeted to the vacuole via Vid vesicles, and it exhibited Pep4p- and Vid24p-dependent alkaline phosphatase activation. Vid vesicle-vacuole targeting was reconstituted using Vid vesicles that contained FBPase-delta60Pho8p. These vesicles were incubated with vacuoles in the presence of cytosol and an ATP-regenerating system. Under in vitro conditions, alkaline phosphatase was also activated in a Pep4p- and Vid24p-dependent manner. The GTPase Ypt7p was identified as an essential component in Vid vesicle-vacuole trafficking. Likewise, a number of v-SNAREs (Ykt6p, Nyv1p, Vti1p) and homotypic fusion vacuole protein sorting complex family members (Vps39p and Vps41p) were required for the proper function of Vid vesicles. In contrast, the t-SNARE Vam3p was a necessary vacuolar component. Vid vesicle-vacuole trafficking exhibits characteristics similar to heterotypic membrane fusion events.
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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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