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- PDB-8jau: Structure of CRL2APPBP2 bound with the C-degron of MRPL28 (dimer) -

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Basic information

Entry
Database: PDB / ID: 8jau
TitleStructure of CRL2APPBP2 bound with the C-degron of MRPL28 (dimer)
Components
  • Amyloid protein-binding protein 2
  • Cullin-2
  • Elongin-B
  • Elongin-C
  • MRPL28 C-degron
KeywordsPROTEIN BINDING / E3 Ubiquitination ligase
Function / homology
Function and homology information


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 elongation by RNA polymerase II / TP53 Regulates Transcription of DNA Repair Genes / transcription initiation at RNA polymerase II promoter / Vif-mediated degradation of APOBEC3G / intracellular protein transport / 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 / Antigen processing: Ubiquitination & Proteasome degradation / positive regulation of proteasomal ubiquitin-dependent protein catabolic process / protein-macromolecule adaptor activity / Neddylation / 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 / nucleolus / regulation of transcription by RNA polymerase II / nucleoplasm / nucleus / cytoplasm / cytosol
Similarity search - Function
Amyloid protein-binding protein 2 / Tetratricopeptide repeat / Tetratricopeptide repeat / Cullin protein neddylation domain / Cullin, conserved site / Cullin family signature. / Elongin B / Cullin / Elongin-C / Cullin repeat-like-containing domain superfamily ...Amyloid protein-binding protein 2 / Tetratricopeptide repeat / Tetratricopeptide repeat / Cullin protein neddylation domain / Cullin, conserved site / Cullin family signature. / Elongin B / Cullin / Elongin-C / Cullin repeat-like-containing domain superfamily / Cullin protein, neddylation domain / Cullin protein neddylation domain / Cullin / Cullin, N-terminal / Cullin homology domain / Cullin homology domain superfamily / Cullin family / Cullin family profile. / S-phase kinase-associated protein 1-like / SKP1 component, POZ domain / Skp1 family, tetramerisation domain / Found in Skp1 protein family / TPR repeat region circular profile. / TPR repeat profile. / SKP1/BTB/POZ domain superfamily / Tetratricopeptide repeats / Tetratricopeptide repeat / Ubiquitin family / Ubiquitin homologues / Tetratricopeptide-like helical domain superfamily / Ubiquitin domain profile. / Ubiquitin-like domain / Ubiquitin-like domain superfamily / Winged helix DNA-binding domain superfamily / Winged helix-like DNA-binding domain superfamily
Similarity search - Domain/homology
Cullin-2 / Elongin-C / Elongin-B / Amyloid protein-binding protein 2
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.22 Å
AuthorsZhao, S. / Zhang, K. / Xu, C.
Funding support China, 1items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC) China
CitationJournal: Proc Natl Acad Sci U S A / Year: 2023
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
DepositionMay 7, 2023Deposition site: PDBJ / Processing site: PDBC
Revision 1.0Oct 18, 2023Provider: repository / Type: Initial release
Revision 1.1Oct 25, 2023Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Amyloid protein-binding protein 2
E: Cullin-2
C: Elongin-B
D: Elongin-C
S: MRPL28 C-degron
B: Amyloid protein-binding protein 2
F: MRPL28 C-degron
G: Elongin-B
H: Elongin-C
I: Cullin-2
hetero molecules


Theoretical massNumber of molelcules
Total (without water)359,41811
Polymers359,35210
Non-polymers651
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: light scattering
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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Protein , 4 types, 8 molecules ABEICGDH

#1: Protein Amyloid protein-binding protein 2 / Amyloid beta precursor protein-binding protein 2 / APP-BP2 / Protein interacting with APP tail 1


Mass: 66945.258 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: APPBP2, KIAA0228, PAT1 / Production host: Escherichia coli (E. coli) / References: UniProt: Q92624
#2: Protein Cullin-2 / CUL-2


Mass: 87068.836 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: CUL2 / Production host: Escherichia coli (E. coli) / References: UniProt: Q13617
#3: Protein Elongin-B / EloB / Elongin 18 kDa subunit / RNA polymerase II transcription factor SIII subunit B / SIII p18 / ...EloB / Elongin 18 kDa subunit / RNA polymerase II transcription factor SIII subunit B / SIII p18 / Transcription elongation factor B polypeptide 2


Mass: 13147.781 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: ELOB, TCEB2 / Production host: Escherichia coli (E. coli) / References: UniProt: Q15370
#4: Protein Elongin-C / EloC / Elongin 15 kDa subunit / RNA polymerase II transcription factor SIII subunit C / SIII p15 / ...EloC / Elongin 15 kDa subunit / RNA polymerase II transcription factor SIII subunit C / SIII p15 / Transcription elongation factor B polypeptide 1


Mass: 10843.420 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: ELOC, TCEB1 / Production host: Escherichia coli (E. coli) / References: UniProt: Q15369

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Protein/peptide / Non-polymers , 2 types, 3 molecules SF

#5: Protein/peptide MRPL28 C-degron


Mass: 1670.864 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Escherichia coli (E. coli)
#6: Chemical ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Zn / Feature type: SUBJECT OF INVESTIGATION

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Details

Has ligand of interestY

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: CRL2APPBP2 E3 liganse / Type: COMPLEX / Entity ID: #1-#5 / Source: MULTIPLE SOURCES
Molecular weightValue: 400 kDa/nm / Experimental value: YES
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 7.5
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: OTHER
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2000 nm / Nominal defocus min: 800 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.20.1_4487: / Classification: refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.22 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 156258 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00417432
ELECTRON MICROSCOPYf_angle_d0.51723519
ELECTRON MICROSCOPYf_dihedral_angle_d4.2362311
ELECTRON MICROSCOPYf_chiral_restr0.0382558
ELECTRON MICROSCOPYf_plane_restr0.0043010

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