BAIT
MOT2
NOT4, SIG1, CCR4-NOT core ubiquitin-protein ligase subunit MOT2, L000001887, L000001137, YER068W
Ubiquitin-protein ligase subunit of the CCR4-NOT complex; with Ubc4p, ubiquitinates nascent polypeptide-associated complex subunits and histone demethyase Jhd2p; CCR4-NOT has roles in transcription regulation, mRNA degradation, and post-transcriptional modifications; regulates levels of DNA Polymerase-{alpha} to promote efficient and accurate DNA replication
GO Process (5)
GO Function (2)
GO Component (2)
Gene Ontology Biological Process
Gene Ontology Molecular Function
Gene Ontology Cellular Component
Saccharomyces cerevisiae (S288c)
PREY
NPL4
HRD4, L000001271, YBR170C
Substrate-recruiting cofactor of the Cdc48p-Npl4p-Ufd1p segregase; assists Cdc48p in the dislocation of misfolded, polyubiquitinated ERAD substrates that are subsequently delivered to the proteasome for degradation; also involved in the regulated destruction of resident ER membrane proteins, such as HMG-CoA reductase (Hmg1/2p) and cytoplasmic proteins (Fbp1p); role in mobilizing membrane bound transcription factors by regulated ubiquitin/proteasome-dependent processing (RUP)
GO Process (10)
GO Function (0)
GO Component (9)
Gene Ontology Biological Process
- ER-associated misfolded protein catabolic process [IMP]
- ER-associated ubiquitin-dependent protein catabolic process [IMP]
- cytoplasm-associated proteasomal ubiquitin-dependent protein catabolic process [IMP]
- mitochondria-associated ubiquitin-dependent protein catabolic process [IMP]
- mitotic spindle disassembly [IMP]
- nonfunctional rRNA decay [IMP]
- positive regulation of protein localization to nucleus [IMP]
- proteasome-mediated ubiquitin-dependent protein catabolic process [IMP]
- retrograde protein transport, ER to cytosol [IMP]
- ribosome-associated ubiquitin-dependent protein catabolic process [IMP]
Gene Ontology Cellular Component
- Cdc48p-Npl4p-Ufd1p AAA ATPase complex [IDA]
- Cdc48p-Npl4p-Vms1p AAA ATPase complex [IDA]
- Doa10p ubiquitin ligase complex [IDA]
- Hrd1p ubiquitin ligase ERAD-L complex [IDA]
- RQC complex [IDA]
- cytoplasm [IDA]
- integral component of membrane [ISM]
- nuclear outer membrane-endoplasmic reticulum membrane network [IDA]
- nucleus [IDA]
Saccharomyces cerevisiae (S288c)
Synthetic Lethality
A genetic interaction is inferred when mutations or deletions in separate genes, each of which alone causes a minimal phenotype, result in lethality when combined in the same cell under a given condition.
Publication
Modulation of Ubc4p/Ubc5p-mediated stress responses by the RING-finger-dependent ubiquitin-protein ligase Not4p in Saccharomyces cerevisiae.
The Ccr4-Not complex consists of nine subunits and acts as a regulator of mRNA biogenesis in Saccharomyces cerevisiae. The human ortholog of yeast NOT4, CNOT4, displays UbcH5B-dependent ubiquitin-protein ligase (E3 ligase) activity in a reconstituted in vitro system. However, an in vivo role for this enzymatic activity has not been identified. Site-directed mutagenesis of the RING finger of yeast Not4p ... [more]
Genetics May. 01, 2007; 176(1);181-92 [Pubmed: 17513889]
Throughput
- Low Throughput
Ontology Terms
- phenotype: inviable (APO:0000112)
Curated By
- BioGRID