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Yorodumi- PDB-9pdi: Nub1/Fat10-processing human 26S proteasome with Rpt2 at top of sp... -
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Open data
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Basic information
| Entry | Database: PDB / ID: 9pdi | ||||||
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| Title | Nub1/Fat10-processing human 26S proteasome with Rpt2 at top of spiral staircase and partially unfolded Eos (AAA+ motor locally refined) | ||||||
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Keywords | HYDROLASE/PROTEIN BINDING / 26S Proteasome / MOTOR PROTEIN / HYDROLASE-PROTEIN BINDING complex | ||||||
| Function / homology | Function and homology informationthyrotropin-releasing hormone receptor binding / nuclear proteasome complex / host-mediated perturbation of viral transcription / positive regulation of inclusion body assembly / Hydrolases; Acting on peptide bonds (peptidases); Omega peptidases / proteasome accessory complex / purine ribonucleoside triphosphate binding / cytosolic proteasome complex / positive regulation of proteasomal protein catabolic process / proteasome-activating activity ...thyrotropin-releasing hormone receptor binding / nuclear proteasome complex / host-mediated perturbation of viral transcription / positive regulation of inclusion body assembly / Hydrolases; Acting on peptide bonds (peptidases); Omega peptidases / proteasome accessory complex / purine ribonucleoside triphosphate binding / cytosolic proteasome complex / positive regulation of proteasomal protein catabolic process / proteasome-activating activity / proteasome regulatory particle, lid subcomplex / proteasome regulatory particle, base subcomplex / metal-dependent deubiquitinase activity / protein K63-linked deubiquitination / negative regulation of programmed cell death / Regulation of ornithine decarboxylase (ODC) / Proteasome assembly / Cross-presentation of soluble exogenous antigens (endosomes) / proteasome core complex / Somitogenesis / K63-linked deubiquitinase activity / proteasome binding / transcription factor binding / myofibril / general transcription initiation factor binding / blastocyst development / positive regulation of RNA polymerase II transcription preinitiation complex assembly / protein deubiquitination / immune system process / NF-kappaB binding / endopeptidase activator activity / proteasome core complex, alpha-subunit complex / SARS-CoV-1 targets host intracellular signalling and regulatory pathways / regulation of proteasomal protein catabolic process / ERAD pathway / inclusion body / proteasome complex / TBP-class protein binding / proteolysis involved in protein catabolic process / sarcomere / Regulation of activated PAK-2p34 by proteasome mediated degradation / Autodegradation of Cdh1 by Cdh1:APC/C / APC/C:Cdc20 mediated degradation of Securin / N-glycan trimming in the ER and Calnexin/Calreticulin cycle / Asymmetric localization of PCP proteins / Ubiquitin-dependent degradation of Cyclin D / SCF-beta-TrCP mediated degradation of Emi1 / NIK-->noncanonical NF-kB signaling / TNFR2 non-canonical NF-kB pathway / AUF1 (hnRNP D0) binds and destabilizes mRNA / Vpu mediated degradation of CD4 / Assembly of the pre-replicative complex / Ubiquitin-Mediated Degradation of Phosphorylated Cdc25A / Degradation of DVL / Dectin-1 mediated noncanonical NF-kB signaling / Cdc20:Phospho-APC/C mediated degradation of Cyclin A / negative regulation of inflammatory response to antigenic stimulus / Degradation of AXIN / P-body / Hh mutants are degraded by ERAD / lipopolysaccharide binding / Activation of NF-kappaB in B cells / Degradation of GLI1 by the proteasome / G2/M Checkpoints / Hedgehog ligand biogenesis / GSK3B and BTRC:CUL1-mediated-degradation of NFE2L2 / Defective CFTR causes cystic fibrosis / Autodegradation of the E3 ubiquitin ligase COP1 / Negative regulation of NOTCH4 signaling / Regulation of RUNX3 expression and activity / Vif-mediated degradation of APOBEC3G / Hedgehog 'on' state / FBXL7 down-regulates AURKA during mitotic entry and in early mitosis / Degradation of GLI2 by the proteasome / GLI3 is processed to GLI3R by the proteasome / APC/C:Cdh1 mediated degradation of Cdc20 and other APC/C:Cdh1 targeted proteins in late mitosis/early G1 / MAPK6/MAPK4 signaling / double-strand break repair via homologous recombination / Degradation of beta-catenin by the destruction complex / Oxygen-dependent proline hydroxylation of Hypoxia-inducible Factor Alpha / ABC-family proteins mediated transport / double-strand break repair via nonhomologous end joining / CDK-mediated phosphorylation and removal of Cdc6 / CLEC7A (Dectin-1) signaling / SCF(Skp2)-mediated degradation of p27/p21 / response to virus / FCERI mediated NF-kB activation / Regulation of expression of SLITs and ROBOs / Metalloprotease DUBs / Regulation of PTEN stability and activity / nuclear matrix / Interleukin-1 signaling / cytoplasmic ribonucleoprotein granule / Orc1 removal from chromatin / metallopeptidase activity / Regulation of RAS by GAPs / Regulation of RUNX2 expression and activity / osteoblast differentiation / The role of GTSE1 in G2/M progression after G2 checkpoint / Separation of Sister Chromatids Similarity search - Function | ||||||
| Biological species | Homo sapiens (human) | ||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.98 Å | ||||||
Authors | Arkinson, C. / Gee, C.L. / Martin, A. | ||||||
| Funding support | United States, 1items
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Citation | Journal: Nat Struct Mol Biol / Year: 2025Title: Structural landscape of the degrading 26S proteasome reveals conformation-specific binding of TXNL1. Authors: Connor Arkinson / Christine L Gee / Zeyuan Zhang / Ken C Dong / Andreas Martin / ![]() Abstract: The 26S proteasome targets many cellular proteins for degradation during homeostasis and quality control. Proteasome-interacting cofactors modulate these functions and aid in substrate degradation. ...The 26S proteasome targets many cellular proteins for degradation during homeostasis and quality control. Proteasome-interacting cofactors modulate these functions and aid in substrate degradation. Here we solve high-resolution structures of the redox active cofactor TXNL1 bound to the human 26S proteasome at saturating and substoichiometric concentrations by time-resolved cryo-electron microscopy (cryo-EM). We identify distinct binding modes of TXNL1 that depend on the proteasome conformation and ATPase motor states. Together with biophysical and biochemical experiments, we show that the resting-state proteasome binds TXNL1 with low affinity and in variable positions on top of the Rpn11 deubiquitinase. In contrast, in the actively degrading proteasome, TXNL1 uses additional interactions for high-affinity binding, whereby its C-terminal tail covers the catalytic groove of Rpn11 and coordinates the active-site Zn. Furthermore, these cryo-EM structures of the degrading proteasome capture the ATPase hexamer in several spiral-staircase arrangements that indicate temporally asymmetric hydrolysis and conformational changes in bursts during mechanical substrate unfolding and translocation. Remarkably, we catch the proteasome in the act of unfolding the β-barrel mEos3.2 substrate while the ATPase hexamer is in a particular staircase register. Our findings advance current models for protein translocation through hexameric AAA+ motors and reveal how the proteasome uses its distinct conformational states to coordinate cofactor binding and substrate processing. | ||||||
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Structure visualization
| Structure viewer | Molecule: Molmil Jmol/JSmol |
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Downloads & links
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Download
| PDBx/mmCIF format | 9pdi.cif.gz | 848.9 KB | Display | PDBx/mmCIF format |
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| PDB format | pdb9pdi.ent.gz | Display | PDB format | |
| PDBx/mmJSON format | 9pdi.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Summary document | 9pdi_validation.pdf.gz | 2.2 MB | Display | wwPDB validaton report |
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| Full document | 9pdi_full_validation.pdf.gz | 2.3 MB | Display | |
| Data in XML | 9pdi_validation.xml.gz | 133.7 KB | Display | |
| Data in CIF | 9pdi_validation.cif.gz | 201.8 KB | Display | |
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/pd/9pdi ftp://data.pdbj.org/pub/pdb/validation_reports/pd/9pdi | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 71534MC ![]() 9e8gC ![]() 9e8hC ![]() 9e8iC ![]() 9e8jC ![]() 9e8kC ![]() 9e8lC ![]() 9e8nC ![]() 9e8oC ![]() 9e8qC ![]() 9pdlC ![]() 9pdnC ![]() 9pf1C C: citing same article ( M: map data used to model this data |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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Links
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Assembly
| Deposited unit | ![]()
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Components
-26S protease regulatory subunit ... , 2 types, 2 molecules CE
| #1: Protein | Mass: 45694.047 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: PSMC5, SUG1 / Cell line (production host): HEK293 / Production host: Homo sapiens (human) / References: UniProt: P62195 |
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| #3: Protein | Mass: 44241.008 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: PSMC6, SUG2 / Cell line (production host): HEK293 / Production host: Homo sapiens (human) / References: UniProt: P62333 |
-26S proteasome regulatory subunit ... , 4 types, 4 molecules DABF
| #2: Protein | Mass: 47426.141 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: PSMC4, MIP224, TBP7 / Cell line (production host): HEK293 / Production host: Homo sapiens (human) / References: UniProt: P43686 |
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| #12: Protein | Mass: 48700.805 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: PSMC2, MSS1 / Cell line (production host): HEK293 / Production host: Homo sapiens (human) / References: UniProt: P35998 |
| #13: Protein | Mass: 49260.504 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: PSMC1 / Cell line (production host): HEK293 / Production host: Homo sapiens (human) / References: UniProt: P62191 |
| #14: Protein | Mass: 49266.457 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: PSMC3, TBP1 / Cell line (production host): HEK293 / Production host: Homo sapiens (human) / References: UniProt: P17980 |
-Proteasome subunit alpha type- ... , 7 types, 7 molecules GHIJKLM
| #4: Protein | Mass: 27432.459 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: PSMA6, PROS27 / Cell line (production host): HEK293 / Production host: Homo sapiens (human)References: UniProt: P60900, proteasome endopeptidase complex |
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| #5: Protein | Mass: 25927.535 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: PSMA2, HC3, PSC3 / Cell line (production host): HEK293 / Production host: Homo sapiens (human)References: UniProt: P25787, proteasome endopeptidase complex |
| #6: Protein | Mass: 29525.842 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: PSMA4, HC9, PSC9 / Cell line (production host): HEK293 / Production host: Homo sapiens (human)References: UniProt: P25789, proteasome endopeptidase complex |
| #7: Protein | Mass: 27929.891 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: PSMA7, HSPC / Cell line (production host): HEK293 / Production host: Homo sapiens (human) / References: UniProt: O14818 |
| #8: Protein | Mass: 26435.977 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: PSMA5 / Cell line (production host): HEK293 / Production host: Homo sapiens (human) / References: UniProt: P28066 |
| #9: Protein | Mass: 29595.627 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: PSMA1, HC2, NU, PROS30, PSC2 / Cell line (production host): HEK293 / Production host: Homo sapiens (human)References: UniProt: P25786, proteasome endopeptidase complex |
| #10: Protein | Mass: 28469.252 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: PSMA3, HC8, PSC8 / Cell line (production host): HEK293 / Production host: Homo sapiens (human)References: UniProt: P25788, proteasome endopeptidase complex |
-Protein/peptide / Protein , 2 types, 2 molecules vc
| #11: Protein/peptide | Mass: 1890.321 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human) |
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| #15: Protein | Mass: 46940.898 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: PSMD14 / Production host: Homo sapiens (human) / References: UniProt: O00487 |
-Non-polymers , 4 types, 10 molecules 






| #16: Chemical | | #17: Chemical | #18: Chemical | ChemComp-ADP / #19: Chemical | ChemComp-ZN / | |
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-Details
| Has ligand of interest | Y |
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| Has protein modification | N |
-Experimental details
-Experiment
| Experiment | Method: ELECTRON MICROSCOPY |
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| EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
| Component | Name: 26S proteasome degrading FAT10-eos fusion in presence of NUB1 Type: COMPLEX / Entity ID: #1-#15 / Source: RECOMBINANT |
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| Molecular weight | Value: 2.6 MDa / Experimental value: NO |
| Source (natural) | Organism: Homo sapiens (human) |
| Source (recombinant) | Organism: Homo sapiens (human) / Cell: HEK293 |
| Buffer solution | pH: 7.4 |
| Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
| Specimen support | Grid material: GOLD / Grid mesh size: 200 divisions/in. / Grid type: UltrAuFoil R2/2 |
| Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 298 K |
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Electron microscopy imaging
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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| Microscopy | Model: TFS KRIOS |
| Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
| Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 1700 nm / Nominal defocus min: 500 nm / Alignment procedure: BASIC |
| Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
| Image recording | Electron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) |
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Processing
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| CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||
| 3D reconstruction | Resolution: 2.98 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 73136 / Symmetry type: POINT |
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Homo sapiens (human)
United States, 1items
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FIELD EMISSION GUN