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Open data
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Basic information
Entry | Database: PDB / ID: 8jal | ||||||
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Title | Structure of CRL2APPBP2 bound with RxxGP degron (dimer) | ||||||
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![]() | PROTEIN BINDING / E3 Ubiquitination ligase | ||||||
Function / homology | ![]() ubiquitin-dependent protein catabolic process via the C-end degron rule pathway / target-directed miRNA degradation / elongin complex / VCB complex / Cul5-RING ubiquitin ligase complex / microtubule associated complex / SCF ubiquitin ligase complex / Cul2-RING ubiquitin ligase complex / microtubule motor activity / ubiquitin ligase complex scaffold activity ...ubiquitin-dependent protein catabolic process via the C-end degron rule pathway / target-directed miRNA degradation / elongin complex / VCB complex / Cul5-RING ubiquitin ligase complex / microtubule associated complex / SCF ubiquitin ligase complex / Cul2-RING ubiquitin ligase complex / microtubule motor activity / ubiquitin ligase complex scaffold activity / SCF-dependent proteasomal ubiquitin-dependent protein catabolic process / Pausing and recovery of Tat-mediated HIV elongation / Tat-mediated HIV elongation arrest and recovery / HIV elongation arrest and recovery / Pausing and recovery of HIV elongation / ubiquitin-like ligase-substrate adaptor activity / intracellular transport / Tat-mediated elongation of the HIV-1 transcript / Formation of HIV-1 elongation complex containing HIV-1 Tat / Formation of HIV elongation complex in the absence of HIV Tat / RNA Polymerase II Transcription Elongation / Formation of RNA Pol II elongation complex / RNA Polymerase II Pre-transcription Events / intrinsic apoptotic signaling pathway / transcription corepressor binding / transcription initiation at RNA polymerase II promoter / TP53 Regulates Transcription of DNA Repair Genes / transcription elongation by RNA polymerase II / intracellular protein transport / Vif-mediated degradation of APOBEC3G / cytoplasmic vesicle membrane / Oxygen-dependent proline hydroxylation of Hypoxia-inducible Factor Alpha / Inactivation of CSF3 (G-CSF) signaling / Evasion by RSV of host interferon responses / Regulation of expression of SLITs and ROBOs / G1/S transition of mitotic cell cycle / ubiquitin-protein transferase activity / positive regulation of proteasomal ubiquitin-dependent protein catabolic process / Antigen processing: Ubiquitination & Proteasome degradation / Neddylation / protein-macromolecule adaptor activity / ubiquitin-dependent protein catabolic process / protein-containing complex assembly / proteasome-mediated ubiquitin-dependent protein catabolic process / microtubule / protein ubiquitination / ubiquitin protein ligase binding / protein-containing complex binding / regulation of transcription by RNA polymerase II / nucleolus / nucleoplasm / nucleus / cytosol / cytoplasm Similarity search - Function | ||||||
Biological species | ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.3 Å | ||||||
![]() | Zhao, S. / Zhang, K. / Xu, C. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Molecular basis for C-degron recognition by CRL2 ubiquitin ligase. Authors: Shidong Zhao / Diana Olmayev-Yaakobov / Wenwen Ru / Shanshan Li / Xinyan Chen / Jiahai Zhang / Xuebiao Yao / Itay Koren / Kaiming Zhang / Chao Xu / ![]() ![]() Abstract: E3 ubiquitin ligases determine the specificity of eukaryotic protein degradation by selective binding to destabilizing protein motifs, termed degrons, in substrates for ubiquitin-mediated proteolysis. ...E3 ubiquitin ligases determine the specificity of eukaryotic protein degradation by selective binding to destabilizing protein motifs, termed degrons, in substrates for ubiquitin-mediated proteolysis. The exposed C-terminal residues of proteins can act as C-degrons that are recognized by distinct substrate receptors (SRs) as part of dedicated cullin-RING E3 ubiquitin ligase (CRL) complexes. APPBP2, an SR of Cullin 2-RING ligase (CRL2), has been shown to recognize R-x-x-G/C-degron; however, the molecular mechanism of recognition remains elusive. By solving several cryogenic electron microscopy structures of active CRL2 bound with different R-x-x-G/C-degrons, we unveiled the molecular mechanisms underlying the assembly of the CRL2 dimer and tetramer, as well as C-degron recognition. The structural study, complemented by binding experiments and cell-based assays, demonstrates that APPBP2 specifically recognizes the R-x-x-G/C-degron via a bipartite mechanism; arginine and glycine, which play critical roles in C-degron recognition, accommodate distinct pockets that are spaced by two residues. In addition, the binding pocket is deep enough to enable the interaction of APPBP2 with the motif placed at or up to three residues upstream of the C-end. Overall, our study not only provides structural insight into CRL2-mediated protein turnover but also serves as the basis for future structure-based chemical probe design. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 474.6 KB | Display | ![]() |
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PDB format | ![]() | Display | ![]() | |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 36129MC ![]() 8jaqC ![]() 8jarC ![]() 8jasC ![]() 8jauC ![]() 8javC M: map data used to model this data C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Assembly
Deposited unit | ![]()
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Components
-Protein , 4 types, 8 molecules ABEICGDH
#1: Protein | Mass: 66945.258 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() #2: Protein | Mass: 87068.836 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() #3: Protein | Mass: 13147.781 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() #4: Protein | Mass: 12485.135 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() |
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-Protein/peptide / Non-polymers , 2 types, 3 molecules SF![](data/chem/img/ZN.gif)
![](data/chem/img/ZN.gif)
#5: Protein/peptide | Mass: 1259.463 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() #6: Chemical | ChemComp-ZN / | |
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-Details
Has ligand of interest | Y |
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-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: CRL2APPBP2 E3 liganse / Type: COMPLEX / Entity ID: #1-#5 / Source: MULTIPLE SOURCES |
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Molecular weight | Value: 400 kDa/nm / Experimental value: NO |
Source (natural) | Organism: ![]() |
Source (recombinant) | Organism: ![]() ![]() |
Buffer solution | pH: 7.5 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Cryogen name: ETHANE |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 2000 nm / Nominal defocus min: 800 nm |
Image recording | Electron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) |
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Processing
Software | Name: PHENIX / Version: 1.20.1_4487: / Classification: refinement | ||||||||||||||||||||||||
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
3D reconstruction | Resolution: 3.3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 273296 / Symmetry type: POINT | ||||||||||||||||||||||||
Refine LS restraints |
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