The eukaryotic 26S proteasome plays a central role in ubiquitin-dependent intracellular protein metabolism. The multimeric holoenzyme is composed of two major subcomplexes, known as the 20S proteolytic core particle and the 19S regulatory particle (RP). The RP can be further dissected into two multisubunit complexes, the lid and the base complex. The lid complex shares striking similarities with another multiprotein complex, the COP9 signalosome. Several subunits of both complexes contain the characteristic PCI domain, a structural motif important for complex assembly. The COP9 signalosome was shown to act as a versatile regulator in numerous pathways. To help define the molecular interactions of the signalosome during Drosophila development, we performed a yeast two-hybrid screen to identify proteins that physically interact with subunit 2 of the complex, namely Alien/CSN2. Here, we report that Drosophila Rpn6, a non-ATPase subunit of the RP lid complex, interacts with Alien/CSN2 via its PCI domain. The temporal and spatial expression patterns of Rpn6 and alien/CSN2 overlap on a large scale during development providing additional evidence for their interaction in vivo. Analyses of an Rpn6 P element insertion mutant and newly generated Rpn6 alleles reveal that Rpn6 is essential for Drosophila development.
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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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