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- EMDB-37746: Local refinement of FEM1B bound with the C-degron of CUX1 -

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Basic information

Entry
Database: EMDB / ID: EMD-37746
TitleLocal refinement of FEM1B bound with the C-degron of CUX1
Map data
Sample
  • Complex: Local refinement of FEM1B bound with the C-degron of CUX1
    • Protein or peptide: Protein fem-1 homolog B
    • Protein or peptide: Protein CASP
KeywordsE3 ubiquitin ligase / Pro/C-degron / PROTEIN BINDING
Function / homology
Function and homology information


regulation of ubiquitin-protein transferase activity / epithelial cell maturation involved in prostate gland development / Intra-Golgi traffic / branching involved in prostate gland morphogenesis / ubiquitin-dependent protein catabolic process via the C-end degron rule pathway / regulation of DNA damage checkpoint / intra-Golgi vesicle-mediated transport / regulation of extrinsic apoptotic signaling pathway via death domain receptors / death receptor binding / Cul2-RING ubiquitin ligase complex ...regulation of ubiquitin-protein transferase activity / epithelial cell maturation involved in prostate gland development / Intra-Golgi traffic / branching involved in prostate gland morphogenesis / ubiquitin-dependent protein catabolic process via the C-end degron rule pathway / regulation of DNA damage checkpoint / intra-Golgi vesicle-mediated transport / regulation of extrinsic apoptotic signaling pathway via death domain receptors / death receptor binding / Cul2-RING ubiquitin ligase complex / ubiquitin ligase complex / ubiquitin-like ligase-substrate adaptor activity / Neddylation / proteasome-mediated ubiquitin-dependent protein catabolic process / protein ubiquitination / Golgi membrane / apoptotic process / Golgi apparatus / mitochondrion / nucleoplasm / metal ion binding / nucleus / cytoplasm / cytosol
Similarity search - Function
CASP, C-terminal / CASP C terminal / CUX1-like, N-terminal tRNA-binding arm / Ankyrin repeat / Ankyrin repeats (3 copies) / Ankyrin repeat profile. / Ankyrin repeat region circular profile. / ankyrin repeats / Ankyrin repeat / Ankyrin repeat-containing domain superfamily
Similarity search - Domain/homology
Protein CASP / Protein fem-1 homolog B
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.5 Å
AuthorsChen X / Zhang K / Xu C
Funding support China, 1 items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC) China
CitationJournal: Nat Commun / Year: 2024
Title: Mechanism of Ψ-Pro/C-degron recognition by the CRL2 ubiquitin ligase.
Authors: Xinyan Chen / Anat Raiff / Shanshan Li / Qiong Guo / Jiahai Zhang / Hualin Zhou / Richard T Timms / Xuebiao Yao / Stephen J Elledge / Itay Koren / Kaiming Zhang / Chao Xu /
Abstract: The E3 ligase-degron interaction determines the specificity of the ubiquitin‒proteasome system. We recently discovered that FEM1B, a substrate receptor of Cullin 2-RING ligase (CRL2), recognizes C- ...The E3 ligase-degron interaction determines the specificity of the ubiquitin‒proteasome system. We recently discovered that FEM1B, a substrate receptor of Cullin 2-RING ligase (CRL2), recognizes C-degrons containing a C-terminal proline. By solving several cryo-EM structures of CRL2 bound to different C-degrons, we elucidate the dimeric assembly of the complex. Furthermore, we reveal distinct dimerization states of unmodified and neddylated CRL2 to uncover the NEDD8-mediated activation mechanism of CRL2. Our research also indicates that, FEM1B utilizes a bipartite mechanism to recognize both the C-terminal proline and an upstream aromatic residue within the substrate. These structural findings, complemented by in vitro ubiquitination and in vivo cell-based assays, demonstrate that CRL2-mediated polyubiquitination and subsequent protein turnover depend on both FEM1B-degron interactions and the dimerization state of the E3 ligase complex. Overall, this study deepens our molecular understanding of how Cullin-RING E3 ligase substrate selection mediates protein turnover.
History
DepositionOct 11, 2023-
Header (metadata) releaseApr 3, 2024-
Map releaseApr 3, 2024-
UpdateMay 8, 2024-
Current statusMay 8, 2024Processing site: PDBc / Status: Released

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Structure visualization

Supplemental images

emd_37746.png

Downloads & links

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Map

FileDownload / File: emd_37746.map.gz / Format: CCP4 / Size: 512 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
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Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.82 Å/pix.
x 512 pix.
= 419.84 Å		0.82 Å/pix.
x 512 pix.
= 419.84 Å		0.82 Å/pix.
x 512 pix.
= 419.84 Å

Surface

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Images are generated by Spider.

Voxel sizeX=Y=Z: 0.82 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.2
Minimum - Maximum-2.0364757 - 3.473338
Average (Standard dev.)-0.00026778842 (±0.023177765)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions512512512
Spacing512512512
CellA=B=C: 419.84 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #1

Fileemd_37746_half_map_1.map
Projections & Slices
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Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #2

Fileemd_37746_half_map_2.map
Projections & Slices
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Sample components

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Entire : Local refinement of FEM1B bound with the C-degron of CUX1

EntireName: Local refinement of FEM1B bound with the C-degron of CUX1
Components
  • Complex: Local refinement of FEM1B bound with the C-degron of CUX1
    • Protein or peptide: Protein fem-1 homolog B
    • Protein or peptide: Protein CASP

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Supramolecule #1: Local refinement of FEM1B bound with the C-degron of CUX1

SupramoleculeName: Local refinement of FEM1B bound with the C-degron of CUX1
type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Protein fem-1 homolog B

MacromoleculeName: Protein fem-1 homolog B / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 70.355062 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MEGLAGYVYK AASEGKVLTL AALLLNRSES DIRYLLGYVS QQGGQRSTPL IIAARNGHAK VVRLLLEHYR VQTQQTGTVR FDGYVIDGA TALWCAAGAG HFEVVKLLVS HGANVNHTTV TNSTPLRAAC FDGRLDIVKY LVENNANISI ANKYDNTCLM I AAYKGHTD ...String:
MEGLAGYVYK AASEGKVLTL AALLLNRSES DIRYLLGYVS QQGGQRSTPL IIAARNGHAK VVRLLLEHYR VQTQQTGTVR FDGYVIDGA TALWCAAGAG HFEVVKLLVS HGANVNHTTV TNSTPLRAAC FDGRLDIVKY LVENNANISI ANKYDNTCLM I AAYKGHTD VVRYLLEQRA DPNAKAHCGA TALHFAAEAG HIDIVKELIK WRAAIVVNGH GMTPLKVAAE SCKADVVELL LS HADCDRR SRIEALELLG ASFANDRENY DIIKTYHYLY LAMLERFQDG DNILEKEVLP PIHAYGNRTE CRNPQELESI RQD RDALHM EGLIVRERIL GADNIDVSHP IIYRGAVYAD NMEFEQCIKL WLHALHLRQK GNRNTHKDLL RFAQVFSQMI HLNE TVKAP DIECVLRCSV LEIEQSMNRV KNISDADVHN AMDNYECNLY TFLYLVCIST KTQCSEEDQC KINKQIYNLI HLDPR TREG FTLLHLAVNS NTPVDDFHTN DVCSFPNALV TKLLLDCGAE VNAVDNEGNS ALHIIVQYNR PISDFLTLHS IIISLV EAG AHTDMTNKQN KTPLDKSTTG VSEILLKTQM KMSLKCLAAR AVRANDINYQ DQIPRTLEEF VGFH

UniProtKB: Protein fem-1 homolog B

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Macromolecule #2: Protein CASP

MacromoleculeName: Protein CASP / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 3.143281 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString:
GGGSGGGSKF ADHLHKFHEN DNGAAAGDLW Q

UniProtKB: Protein CASP

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration5 mg/mL
BufferpH: 7.5
GridMaterial: COPPER / Support film - Material: CARBON / Support film - topology: HOLEY
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277.15 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Specialist opticsEnergy filter - Name: GIF Bioquantum / Energy filter - Slit width: 20 eV
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Number real images: 8112 / Average electron dose: 57.6 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.9 µm / Nominal defocus min: 1.5 µm
Sample stageCooling holder cryogen: NITROGEN
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: NONE
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.5 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 206765
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

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