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Yorodumi- PDB-8ja1: ASFV Topoisomerase ATPase domain in complex with AMP-PNP and Mg2+... -
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Basic information
| Entry | Database: PDB / ID: 8ja1 | ||||||
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| Title | ASFV Topoisomerase ATPase domain in complex with AMP-PNP and Mg2+ (oxidized form) | ||||||
Components | DNA topoisomerase 2 | ||||||
Keywords | ISOMERASE / GHKL NUCLEOTIDE-BINDING FOLD / Topoisomerase / AMP-PNP / ASFV | ||||||
| Function / homology | Function and homology informationsister chromatid segregation / DNA topoisomerase type II (double strand cut, ATP-hydrolyzing) activity / DNA topoisomerase (ATP-hydrolysing) / DNA topological change / host cell cytoplasm / DNA binding / ATP binding / metal ion binding Similarity search - Function | ||||||
| Biological species | ![]() African swine fever virus | ||||||
| Method | X-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 1.14 Å | ||||||
Authors | Chang, C.-W. / Pang, A.H. / Tsai, M.-D. | ||||||
| Funding support | Taiwan, 1items
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Citation | Journal: Commun Chem / Year: 2024Title: A unified view on enzyme catalysis by cryo-EM study of a DNA topoisomerase. Authors: Chiung-Wen Mary Chang / Shun-Chang Wang / Chun-Hsiung Wang / Allan H Pang / Cheng-Han Yang / Yao-Kai Chang / Wen-Jin Wu / Ming-Daw Tsai / ![]() Abstract: The theories for substrate recognition in enzyme catalysis have evolved from lock-key to induced fit, then conformational selection, and conformational selection followed by induced fit. However, the ...The theories for substrate recognition in enzyme catalysis have evolved from lock-key to induced fit, then conformational selection, and conformational selection followed by induced fit. However, the prevalence and consensus of these theories require further examination. Here we use cryogenic electron microscopy and African swine fever virus type 2 topoisomerase (AsfvTop2) to demonstrate substrate binding theories in a joint and ordered manner: catalytic selection by the enzyme, conformational selection by the substrates, then induced fit. The apo-AsfvTop2 pre-exists in six conformers that comply with the two-gate mechanism directing DNA passage and release in the Top2 catalytic cycle. The structures of AsfvTop2-DNA-inhibitor complexes show that substantial induced-fit changes occur locally from the closed apo-conformer that however is too far-fetched for the open apo-conformer. Furthermore, the ATPase domain of AsfvTop2 in the MgAMP-PNP-bound crystal structures coexist in reduced and oxidized forms involving a disulfide bond, which can regulate the AsfvTop2 function. | ||||||
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Structure visualization
| Structure viewer | Molecule: Molmil Jmol/JSmol |
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Downloads & links
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Download
| PDBx/mmCIF format | 8ja1.cif.gz | 107 KB | Display | PDBx/mmCIF format |
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| PDB format | pdb8ja1.ent.gz | 75.5 KB | Display | PDB format |
| PDBx/mmJSON format | 8ja1.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Summary document | 8ja1_validation.pdf.gz | 1.3 MB | Display | wwPDB validaton report |
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| Full document | 8ja1_full_validation.pdf.gz | 1.3 MB | Display | |
| Data in XML | 8ja1_validation.xml.gz | 21.1 KB | Display | |
| Data in CIF | 8ja1_validation.cif.gz | 33.3 KB | Display | |
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/ja/8ja1 ftp://data.pdbj.org/pub/pdb/validation_reports/ja/8ja1 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 8j87C ![]() 8j88C ![]() 8j89C ![]() 8j8aC ![]() 8j8bC ![]() 8j8cC ![]() 8j9vC ![]() 8j9wC ![]() 8j9xC ![]() 8ja2C C: citing same article ( |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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Assembly
| Deposited unit | ![]()
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| 1 | ![]()
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| Components on special symmetry positions |
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Components
| #1: Protein | Mass: 45463.555 Da / Num. of mol.: 1 / Fragment: ATPase domain Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() African swine fever virus / Gene: P1192R / Production host: ![]() |
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| #2: Chemical | ChemComp-MG / |
| #3: Chemical | ChemComp-ANP / |
| #4: Water | ChemComp-HOH / |
| Has ligand of interest | Y |
| Has protein modification | Y |
-Experimental details
-Experiment
| Experiment | Method: X-RAY DIFFRACTION / Number of used crystals: 1 |
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Sample preparation
| Crystal | Density Matthews: 2.61 Å3/Da / Density % sol: 52.88 % |
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| Crystal grow | Temperature: 291.15 K / Method: vapor diffusion, hanging drop / Details: PEG 3350, LiSO4, Tris-HCl |
-Data collection
| Diffraction | Mean temperature: 100 K / Serial crystal experiment: N |
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| Diffraction source | Source: SYNCHROTRON / Site: NSRRC / Beamline: TPS 05A / Wavelength: 0.9998 Å |
| Detector | Type: RAYONIX MX300-HS / Detector: CCD / Date: Apr 27, 2022 |
| Radiation | Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray |
| Radiation wavelength | Wavelength: 0.9998 Å / Relative weight: 1 |
| Reflection | Resolution: 1.14→43.18 Å / Num. obs: 166668 / % possible obs: 99.8 % / Redundancy: 20 % / Biso Wilson estimate: 11.37 Å2 / CC1/2: 0.999 / Rmerge(I) obs: 0.098 / Net I/σ(I): 15.1 |
| Reflection shell | Resolution: 1.14→1.2 Å / Num. unique obs: 23634 / CC1/2: 0.696 |
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Processing
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| Refinement | Method to determine structure: MOLECULAR REPLACEMENT / Resolution: 1.14→37.13 Å / SU ML: 0.1069 / Cross valid method: FREE R-VALUE / σ(F): 1.34 / Phase error: 17.8135 Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2
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| Solvent computation | Shrinkage radii: 0.9 Å / VDW probe radii: 1.11 Å / Solvent model: FLAT BULK SOLVENT MODEL | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Displacement parameters | Biso mean: 16.28 Å2 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Refinement step | Cycle: LAST / Resolution: 1.14→37.13 Å
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| Refine LS restraints |
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| LS refinement shell |
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African swine fever virus
X-RAY DIFFRACTION
Taiwan, 1items
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