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Open data
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Basic information
| Entry | Database: PDB / ID: 5g05 | |||||||||
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| Title | Cryo-EM structure of combined apo phosphorylated APC | |||||||||
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Keywords | CELL CYCLE / PHOSPHORYLATION / MITOSIS / UBIQUITINATION | |||||||||
| Function / homology | Function and homology informationAntigen processing: Ubiquitination & Proteasome degradation / positive regulation of synapse maturation / Conversion from APC/C:Cdc20 to APC/C:Cdh1 in late anaphase / regulation of mitotic cell cycle spindle assembly checkpoint / Inactivation of APC/C via direct inhibition of the APC/C complex / APC/C:Cdc20 mediated degradation of mitotic proteins / positive regulation of synaptic plasticity / anaphase-promoting complex / Aberrant regulation of mitotic exit in cancer due to RB1 defects / regulation of meiotic cell cycle ...Antigen processing: Ubiquitination & Proteasome degradation / positive regulation of synapse maturation / Conversion from APC/C:Cdc20 to APC/C:Cdh1 in late anaphase / regulation of mitotic cell cycle spindle assembly checkpoint / Inactivation of APC/C via direct inhibition of the APC/C complex / APC/C:Cdc20 mediated degradation of mitotic proteins / positive regulation of synaptic plasticity / anaphase-promoting complex / Aberrant regulation of mitotic exit in cancer due to RB1 defects / regulation of meiotic cell cycle / anaphase-promoting complex-dependent catabolic process / metaphase/anaphase transition of mitotic cell cycle / protein branched polyubiquitination / Phosphorylation of the APC/C / regulation of exit from mitosis / positive regulation of dendrite morphogenesis / positive regulation of mitotic metaphase/anaphase transition / protein K11-linked ubiquitination / regulation of mitotic metaphase/anaphase transition / ubiquitin-ubiquitin ligase activity / mitotic metaphase chromosome alignment / Regulation of APC/C activators between G1/S and early anaphase / cullin family protein binding / Transcriptional Regulation by VENTX / enzyme-substrate adaptor activity / positive regulation of axon extension / protein K48-linked ubiquitination / heterochromatin / intercellular bridge / APC/C:Cdc20 mediated degradation of Cyclin B / APC-Cdc20 mediated degradation of Nek2A / nuclear periphery / regulation of mitotic cell cycle / Autodegradation of Cdh1 by Cdh1:APC/C / APC/C:Cdc20 mediated degradation of Securin / Assembly of the pre-replicative complex / Cdc20:Phospho-APC/C mediated degradation of Cyclin A / APC/C:Cdh1 mediated degradation of Cdc20 and other APC/C:Cdh1 targeted proteins in late mitosis/early G1 / G protein-coupled receptor binding / brain development / kinetochore / CDK-mediated phosphorylation and removal of Cdc6 / spindle / neuron projection development / ubiquitin-protein transferase activity / mitotic spindle / Separation of Sister Chromatids / ubiquitin protein ligase activity / Antigen processing: Ubiquitination & Proteasome degradation / nervous system development / mitotic cell cycle / microtubule cytoskeleton / Senescence-Associated Secretory Phenotype (SASP) / ubiquitin-dependent protein catabolic process / protein phosphatase binding / molecular adaptor activity / cell differentiation / protein ubiquitination / negative regulation of gene expression / cell division / intracellular membrane-bounded organelle / ubiquitin protein ligase binding / centrosome / nucleolus / zinc ion binding / nucleoplasm / nucleus / cytoplasm / cytosol Similarity search - Function | |||||||||
| Biological species | HOMO SAPIENS (human)![]() UNIDENTIFIED (others) | |||||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.4 Å | |||||||||
Authors | Zhang, S. / Chang, L. / Alfieri, C. / Zhang, Z. / Yang, J. / Maslen, S. / Skehel, M. / Barford, D. | |||||||||
Citation | Journal: Nature / Year: 2016Title: Molecular mechanism of APC/C activation by mitotic phosphorylation. Authors: Suyang Zhang / Leifu Chang / Claudio Alfieri / Ziguo Zhang / Jing Yang / Sarah Maslen / Mark Skehel / David Barford / ![]() Abstract: In eukaryotes, the anaphase-promoting complex (APC/C, also known as the cyclosome) regulates the ubiquitin-dependent proteolysis of specific cell-cycle proteins to coordinate chromosome segregation ...In eukaryotes, the anaphase-promoting complex (APC/C, also known as the cyclosome) regulates the ubiquitin-dependent proteolysis of specific cell-cycle proteins to coordinate chromosome segregation in mitosis and entry into the G1 phase. The catalytic activity of the APC/C and its ability to specify the destruction of particular proteins at different phases of the cell cycle are controlled by its interaction with two structurally related coactivator subunits, Cdc20 and Cdh1. Coactivators recognize substrate degrons, and enhance the affinity of the APC/C for its cognate E2 (refs 4-6). During mitosis, cyclin-dependent kinase (Cdk) and polo-like kinase (Plk) control Cdc20- and Cdh1-mediated activation of the APC/C. Hyperphosphorylation of APC/C subunits, notably Apc1 and Apc3, is required for Cdc20 to activate the APC/C, whereas phosphorylation of Cdh1 prevents its association with the APC/C. Since both coactivators associate with the APC/C through their common C-box and Ile-Arg tail motifs, the mechanism underlying this differential regulation is unclear, as is the role of specific APC/C phosphorylation sites. Here, using cryo-electron microscopy and biochemical analysis, we define the molecular basis of how phosphorylation of human APC/C allows for its control by Cdc20. An auto-inhibitory segment of Apc1 acts as a molecular switch that in apo unphosphorylated APC/C interacts with the C-box binding site and obstructs engagement of Cdc20. Phosphorylation of the auto-inhibitory segment displaces it from the C-box-binding site. Efficient phosphorylation of the auto-inhibitory segment, and thus relief of auto-inhibition, requires the recruitment of Cdk-cyclin in complex with a Cdk regulatory subunit (Cks) to a hyperphosphorylated loop of Apc3. We also find that the small-molecule inhibitor, tosyl-l-arginine methyl ester, preferentially suppresses APC/C(Cdc20) rather than APC/C(Cdh1), and interacts with the binding sites of both the C-box and Ile-Arg tail motifs. Our results reveal the mechanism for the regulation of mitotic APC/C by phosphorylation and provide a rationale for the development of selective inhibitors of this state. | |||||||||
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Structure visualization
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| Structure viewer | Molecule: Molmil Jmol/JSmol |
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Downloads & links
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Download
| PDBx/mmCIF format | 5g05.cif.gz | 1.6 MB | Display | PDBx/mmCIF format |
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| PDB format | pdb5g05.ent.gz | 1.3 MB | Display | PDB format |
| PDBx/mmJSON format | 5g05.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Summary document | 5g05_validation.pdf.gz | 1017.8 KB | Display | wwPDB validaton report |
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| Full document | 5g05_full_validation.pdf.gz | 1.6 MB | Display | |
| Data in XML | 5g05_validation.xml.gz | 284.1 KB | Display | |
| Data in CIF | 5g05_validation.cif.gz | 411.2 KB | Display | |
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/g0/5g05 ftp://data.pdbj.org/pub/pdb/validation_reports/g0/5g05 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 3388MC ![]() 3385C ![]() 3386C ![]() 3387C ![]() 3389C ![]() 3390C ![]() 5g04C C: citing same article ( M: map data used to model this data |
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| Similar structure data |
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Links
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Assembly
| Deposited unit | ![]()
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Components
-ANAPHASE-PROMOTING COMPLEX SUBUNIT ... , 11 types, 13 molecules ABDEGWILMNOXY
| #1: Protein | Mass: 216725.469 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) HOMO SAPIENS (human) / Gene: ANAPC1, TSG24 / Plasmid: PF1, PU1 / Production host: ![]() | ||||||||||||
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| #2: Protein | Mass: 9854.647 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) HOMO SAPIENS (human) / Gene: ANAPC11, HSPC214 / Plasmid: PF1, PU1 / Production host: ![]() | ||||||||||||
| #4: Protein | Mass: 14286.727 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) HOMO SAPIENS (human) / Gene: ANAPC15, C11ORF51, HSPC020 / Plasmid: PF1, PU1 / Production host: ![]() | ||||||||||||
| #5: Protein | Mass: 11677.995 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) HOMO SAPIENS (human) / Gene: ANAPC16, C10ORF104 / Plasmid: PF1, PU1 / Production host: ![]() | ||||||||||||
| #7: Protein | Mass: 9793.999 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) HOMO SAPIENS (human) / Gene: CDC26, ANAPC12, C9ORF17 / Plasmid: PF1, PU1 / Production host: ![]() #8: Protein | | Mass: 92219.227 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) HOMO SAPIENS (human) / Gene: ANAPC4, APC4 / Plasmid: PF1, PU1 / Production host: ![]() #10: Protein | | Mass: 21282.143 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) HOMO SAPIENS (human) / Gene: ANAPC10, APC10 / Plasmid: PF1, PU1 / Production host: ![]() #11: Protein | | Mass: 8528.309 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() #12: Protein | | Mass: 93938.977 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) HOMO SAPIENS (human) / Gene: ANAPC2, APC2, KIAA1406 / Plasmid: PF1, PU1 / Production host: ![]() #13: Protein | | Mass: 85179.766 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) HOMO SAPIENS (human) / Gene: ANAPC5, APC5 / Plasmid: PF1, PU1 / Production host: ![]() #15: Protein | Mass: 66929.367 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) HOMO SAPIENS (human) / Gene: ANAPC7, APC7 / Plasmid: PF1, PU1 / Production host: ![]() |
-CELL DIVISION CYCLE PROTEIN ... , 3 types, 6 molecules CPFHJK
| #3: Protein | Mass: 68921.031 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) HOMO SAPIENS (human) / Gene: CDC23, ANAPC8 / Plasmid: PF1, PU1 / Production host: ![]() #6: Protein | Mass: 91973.125 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) HOMO SAPIENS (human) / Gene: CDC27, ANAPC3, D0S1430E, D17S978E / Plasmid: PF1, PU1 / Production host: ![]() #9: Protein | Mass: 71747.516 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) HOMO SAPIENS (human) / Gene: CDC16, ANAPC6 / Plasmid: PF1, PU1 / Production host: ![]() |
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-Protein/peptide / Non-polymers , 2 types, 4 molecules T

| #14: Protein/peptide | Mass: 1183.313 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) UNIDENTIFIED (others) / Plasmid: PF1, PU1 / Production host: ![]() |
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| #16: Chemical |
-Details
| Has protein modification | 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: RECOMBINANT APO PHOSPHORYLATED APC / Type: COMPLEX |
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| Buffer solution | Name: 20MM HEPES, 150MM NACL, 0. 5MM TCEP / pH: 8 / Details: 20MM HEPES, 150MM NACL, 0. 5MM TCEP |
| Specimen | Conc.: 0.15 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
| Specimen support | Details: CARBON |
| Vitrification | Instrument: FEI VITROBOT MARK III / Cryogen name: ETHANE / Details: LIQUID ETHANE |
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Electron microscopy imaging
| Experimental equipment | ![]() Model: Tecnai Polara / Image courtesy: FEI Company |
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| Microscopy | Model: FEI POLARA 300 / Date: Oct 1, 2015 |
| Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
| Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 78000 X / Nominal defocus max: 4000 nm / Nominal defocus min: 2000 nm / Cs: 2 mm |
| Specimen holder | Temperature: 105 K |
| Image recording | Electron dose: 27 e/Å2 / Film or detector model: FEI FALCON II (4k x 4k) |
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Processing
| Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||
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| 3D reconstruction | Resolution: 3.4 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 921993 / Refinement type: HALF-MAPS REFINED INDEPENDENTLY / Symmetry type: POINT | ||||||||||||
| Refinement | Highest resolution: 3.4 Å | ||||||||||||
| Refinement step | Cycle: LAST / Highest resolution: 3.5 Å
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