Vacuolar proton-translocating ATPases are composed of a peripheral complex, V(1), attached to an integral membrane complex, V(o). Association of the two complexes is essential for ATP-driven proton transport and is regulated post-translationally in response to glucose concentration. A new complex, RAVE, was recently isolated and implicated in glucose-dependent reassembly of V-ATPase complexes that had disassembled in response to glucose deprivation (Seol, J. H., Shevchenko, A., and Deshaies, R. J. (2001) Nat. Cell Biol. 3, 384-391). Here, we provide evidence supporting a role for RAVE in reassembly of the V-ATPase but also demonstrate an essential role in V-ATPase assembly under other conditions. The RAVE complex associates reversibly with V(1) complexes released from the membrane by glucose deprivation but binds constitutively to cytosolic V(1) sectors in a mutant lacking V(o) sectors. V-ATPase complexes from cells lacking RAVE subunits show serious structural and functional defects even in glucose-grown cells or in combination with a mutation that blocks disassembly of the V-ATPase. RAVE small middle dotV(1) interactions are specifically disrupted in cells lacking V(1) subunits E or G, suggesting a direct involvement for these subunits in interaction of the two complexes. Skp1p, a RAVE subunit involved in many different signal transduction pathways, binds stably to other RAVE subunits under conditions that alter RAVE small middle dotV(1) binding; thus, Skp1p recruitment to the RAVE complex does not appear to provide a signal for V-ATPase assembly.
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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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