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Yorodumi- EMDB-4464: Cryo-EM reconstruction of the APC/C-MCC-Cdk2-cyclinA2-Cks2 comple... -
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Open data
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Basic information
| Entry | Database: EMDB / ID: EMD-4464 | |||||||||
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| Title | Cryo-EM reconstruction of the APC/C-MCC-Cdk2-cyclinA2-Cks2 complex in the closed conformation | |||||||||
Map data | sharpened map with B factor -30 | |||||||||
Sample |
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| Biological species | Homo sapiens (human) | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 3.7 Å | |||||||||
Authors | Zhang S / Barford D | |||||||||
| Funding support | United Kingdom, 2 items
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Citation | Journal: Nat Commun / Year: 2019Title: Cyclin A2 degradation during the spindle assembly checkpoint requires multiple binding modes to the APC/C. Authors: Suyang Zhang / Thomas Tischer / David Barford / ![]() Abstract: The anaphase-promoting complex/cyclosome (APC/C) orchestrates cell cycle progression by controlling the temporal degradation of specific cell cycle regulators. Although cyclin A2 and cyclin B1 are ...The anaphase-promoting complex/cyclosome (APC/C) orchestrates cell cycle progression by controlling the temporal degradation of specific cell cycle regulators. Although cyclin A2 and cyclin B1 are both targeted for degradation by the APC/C, during the spindle assembly checkpoint (SAC), the mitotic checkpoint complex (MCC) represses APC/C's activity towards cyclin B1, but not cyclin A2. Through structural, biochemical and in vivo analysis, we identify a non-canonical D box (D2) that is critical for cyclin A2 ubiquitination in vitro and degradation in vivo. During the SAC, cyclin A2 is ubiquitinated by the repressed APC/C-MCC, mediated by the cooperative engagement of its KEN and D2 boxes, ABBA motif, and the cofactor Cks. Once the SAC is satisfied, cyclin A2 binds APC/C-Cdc20 through two mutually exclusive binding modes, resulting in differential ubiquitination efficiency. Our findings reveal that a single substrate can engage an E3 ligase through multiple binding modes, affecting its degradation timing and efficiency. | |||||||||
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Structure visualization
| Movie |
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| Structure viewer | EM map: SurfView Molmil Jmol/JSmol |
| Supplemental images |
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Downloads & links
-EMDB archive
| Map data | emd_4464.map.gz | 17.4 MB | EMDB map data format | |
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| Header (meta data) | emd-4464-v30.xml emd-4464.xml | 34 KB 34 KB | Display Display | EMDB header |
| FSC (resolution estimation) | emd_4464_fsc.xml | 14.2 KB | Display | FSC data file |
| Images | emd_4464.png | 150.9 KB | ||
| Others | emd_4464_half_map_1.map.gz emd_4464_half_map_2.map.gz | 193.9 MB 193.9 MB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-4464 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-4464 | HTTPS FTP |
-Validation report
| Summary document | emd_4464_validation.pdf.gz | 369.5 KB | Display | EMDB validaton report |
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| Full document | emd_4464_full_validation.pdf.gz | 368.6 KB | Display | |
| Data in XML | emd_4464_validation.xml.gz | 20.5 KB | Display | |
| Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-4464 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-4464 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 4463C ![]() 4465C ![]() 4466C ![]() 4467C ![]() 6q6gC ![]() 6q6hC C: citing same article ( |
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| Similar structure data |
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Links
| EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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Map
| File | Download / File: emd_4464.map.gz / Format: CCP4 / Size: 244.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Annotation | sharpened map with B factor -30 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Voxel size | X=Y=Z: 1.06 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Density |
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Half map: halfmap1
| File | emd_4464_half_map_1.map | ||||||||||||
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| Annotation | halfmap1 | ||||||||||||
| Projections & Slices |
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| Density Histograms |
-Half map: halfmap2
| File | emd_4464_half_map_2.map | ||||||||||||
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| Annotation | halfmap2 | ||||||||||||
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| Density Histograms |
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Sample components
+Entire : Cryo-EM reconstruction of the APC/C-MCC-Cdk2-cyclinA2-Cks2 comple...
+Supramolecule #1: Cryo-EM reconstruction of the APC/C-MCC-Cdk2-cyclinA2-Cks2 comple...
+Macromolecule #1: Apc1
+Macromolecule #2: Apc2
+Macromolecule #3: Apc3
+Macromolecule #4: Apc4
+Macromolecule #5: Apc5
+Macromolecule #6: Apc6
+Macromolecule #7: Apc7
+Macromolecule #8: Apc8
+Macromolecule #9: Apc10
+Macromolecule #10: Apc11
+Macromolecule #11: Apc12
+Macromolecule #12: Apc13
+Macromolecule #13: Apc15
+Macromolecule #14: Apc16
+Macromolecule #15: Cdc20
+Macromolecule #16: Cdk2
+Macromolecule #17: Cyclin A2
+Macromolecule #18: Cks2
+Macromolecule #19: BubR1
+Macromolecule #20: Mad2
+Macromolecule #21: Bub3
-Experimental details
-Structure determination
| Method | cryo EM |
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Processing | single particle reconstruction |
| Aggregation state | particle |
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Sample preparation
| Concentration | 0.15 mg/mL |
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| Buffer | pH: 8 / Details: 20mM Hepes, 150mM NaCl, 0.5mM TCEP |
| Vitrification | Cryogen name: ETHANE |
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Electron microscopy
| Microscope | FEI POLARA 300 |
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| Image recording | Film or detector model: FEI FALCON III (4k x 4k) / Detector mode: INTEGRATING / Average electron dose: 28.0 e/Å2 |
| Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
| Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD |
| Experimental equipment | ![]() Model: Tecnai Polara / Image courtesy: FEI Company |
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About Yorodumi


Homo sapiens (human)
Authors
United Kingdom, 2 items
Citation
UCSF Chimera












Z (Sec.)
Y (Row.)
X (Col.)





































unidentified baculovirus
Processing

