BAIT
VMA2
VAT2, H(+)-transporting V1 sector ATPase subunit B, ATPSV, L000002458, YBR127C
Subunit B of V1 peripheral membrane domain of vacuolar H+-ATPase; an electrogenic proton pump found throughout the endomembrane system; contains nucleotide binding sites; also detected in the cytoplasm; protein abundance increases in response to DNA replication stress
GO Process (4)
GO Function (1)
GO Component (4)
Gene Ontology Biological Process
Gene Ontology Molecular Function
Gene Ontology Cellular Component
Saccharomyces cerevisiae (S288c)
PREY
RSP5
MDP1, MUT2, NPI1, SMM1, UBY1, NEDD4 family E3 ubiquitin-protein ligase, L000001054, L000001779, L000001220, YER125W
E3 ubiquitin ligase of NEDD4 family; regulates many cellular processes including MVB sorting, heat shock response, transcription, endocytosis, ribosome stability; mutant tolerates aneuploidy; autoubiquitinates; ubiquitinates Sec23p and Sna3p; deubiquitinated by Ubp2p; activity regulated by SUMO ligase Siz1p, in turn regulates Siz1p SUMO ligase activity; required for efficient Golgi-to-ER trafficking in COPI mutants; human homolog implicated in Liddle syndrome
GO Process (33)
GO Function (3)
GO Component (9)
Gene Ontology Biological Process
- cellular response to UV [IMP]
- chromatin assembly or disassembly [IMP]
- late endosome to vacuole transport via multivesicular body sorting pathway [IMP, IPI]
- mitochondrion organization [IGI, IMP]
- positive regulation of endocytosis [IMP]
- positive regulation of fatty acid biosynthetic process [IMP]
- positive regulation of proteasomal ubiquitin-dependent protein catabolic process [IMP]
- positive regulation of receptor-mediated endocytosis [IMP]
- positive regulation of transcription from RNA polymerase II promoter [IMP]
- proteasome-mediated ubiquitin-dependent protein catabolic process [IPI]
- protein autoubiquitination [IGI]
- protein monoubiquitination [IDA, IGI, IMP]
- protein polyubiquitination [IDA, IMP]
- protein ubiquitination [IDA]
- protein ubiquitination involved in ubiquitin-dependent protein catabolic process [IMP]
- regulation of actin cytoskeleton organization [IGI]
- regulation of dolichol biosynthetic process [IGI, IMP]
- regulation of ergosterol biosynthetic process [IGI, IMP]
- regulation of initiation of mating projection growth [IMP]
- regulation of mRNA export from nucleus [IMP, IPI]
- regulation of multivesicular body size [IMP]
- regulation of nitrogen utilization [IGI]
- regulation of phosphate metabolic process [IGI]
- regulation of protein localization [IMP, IPI]
- regulation of rRNA processing [IMP]
- regulation of ribosomal large subunit export from nucleus [IMP]
- regulation of tRNA export from nucleus [IMP]
- regulation of tRNA processing [IMP]
- regulation of ubiquinone biosynthetic process [IGI, IMP]
- response to drug [IMP, IPI]
- ribophagy [IGI]
- ubiquitin-dependent endocytosis [IMP]
- ubiquitin-dependent protein catabolic process via the multivesicular body sorting pathway [IMP]
Gene Ontology Molecular Function
Gene Ontology Cellular Component
Saccharomyces cerevisiae (S288c)
Phenotypic Suppression
A genetic interaction is inferred when mutation or over expression of one gene results in suppression of any phenotype (other than lethality/growth defect) associated with mutation or over expression of another gene.
Publication
Loss of vacuolar H+-ATPase activity in organelles signals ubiquitination and endocytosis of the yeast plasma membrane proton pump Pma1p.
Yeast mutants lacking the intracellular V-ATPase proton pump (vma mutants) have reduced levels of the Pma1p proton pump at the plasma membrane and increased levels in organelles including the vacuolar lumen. We examined the mechanism and physiological consequences of Pma1p mislocalization. Pma1p is ubiquitinated in vma mutants, and ubiquitination depends on the ubiquitin ligase Rsp5p and the arrestin-related adaptor protein ... [more]
J. Biol. Chem. Nov. 14, 2014; 289(46);32316-26 [Pubmed: 25271159]
Throughput
- Low Throughput
Ontology Terms
- phenotype: protein/peptide modification (APO:0000131)
Additional Notes
- Figure 1
- Pma1 ubiquitination
Related interactions
Curated By
- BioGRID