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Yorodumi- PDB-5okd: Crystal structure of bovine Cytochrome bc1 in complex with inhibi... -
+Open data
-Basic information
Entry | Database: PDB / ID: 5okd | |||||||||
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Title | Crystal structure of bovine Cytochrome bc1 in complex with inhibitor SCR0911. | |||||||||
Components |
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Keywords | ELECTRON TRANSPORT / antimalarial inhibitor / Qi site binder | |||||||||
Function / homology | Function and homology information mitochondrial respiratory chain complex III assembly / Respiratory electron transport / mitochondrial respiratory chain complex III / mitochondrial respiratory chain complex IV / quinol-cytochrome-c reductase / ubiquinone binding / ubiquinol-cytochrome-c reductase activity / mitochondrial electron transport, ubiquinol to cytochrome c / respirasome / respiratory electron transport chain ...mitochondrial respiratory chain complex III assembly / Respiratory electron transport / mitochondrial respiratory chain complex III / mitochondrial respiratory chain complex IV / quinol-cytochrome-c reductase / ubiquinone binding / ubiquinol-cytochrome-c reductase activity / mitochondrial electron transport, ubiquinol to cytochrome c / respirasome / respiratory electron transport chain / mitochondrial membrane / 2 iron, 2 sulfur cluster binding / metalloendopeptidase activity / mitochondrial inner membrane / oxidoreductase activity / heme binding / mitochondrion / proteolysis / membrane / metal ion binding Similarity search - Function | |||||||||
Biological species | Bos taurus (cattle) | |||||||||
Method | X-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 3.1 Å | |||||||||
Authors | Amporndanai, K. / O'Neill, P.M. / Hasnain, S.S. / Antonyuk, S.V. | |||||||||
Citation | Journal: IUCrJ / Year: 2018 Title: X-ray and cryo-EM structures of inhibitor-bound cytochrome complexes for structure-based drug discovery. Authors: Kangsa Amporndanai / Rachel M Johnson / Paul M O'Neill / Colin W G Fishwick / Alexander H Jamson / Shaun Rawson / Stephen P Muench / S Samar Hasnain / Svetlana V Antonyuk / Abstract: Cytochrome , a dimeric multi-subunit electron-transport protein embedded in the inner mitochondrial membrane, is a major drug target for the treatment and prevention of malaria and toxoplasmosis. ...Cytochrome , a dimeric multi-subunit electron-transport protein embedded in the inner mitochondrial membrane, is a major drug target for the treatment and prevention of malaria and toxoplasmosis. Structural studies of cytochrome from mammalian homologues co-crystallized with lead compounds have underpinned structure-based drug design to develop compounds with higher potency and selectivity. However, owing to the limited amount of cytochrome that may be available from parasites, all efforts have been focused on homologous cytochrome complexes from mammalian species, which has resulted in the failure of some drug candidates owing to toxicity in the host. Crystallographic studies of the native parasite proteins are not feasible owing to limited availability of the proteins. Here, it is demonstrated that cytochrome is highly amenable to single-particle cryo-EM (which uses significantly less protein) by solving the apo and two inhibitor-bound structures to ∼4.1 Å resolution, revealing clear inhibitor density at the binding site. Therefore, cryo-EM is proposed as a viable alternative method for structure-based drug discovery using both host and parasite enzymes. | |||||||||
History |
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-Structure visualization
Structure viewer | Molecule: MolmilJmol/JSmol |
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-Downloads & links
-Download
PDBx/mmCIF format | 5okd.cif.gz | 861 KB | Display | PDBx/mmCIF format |
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PDB format | pdb5okd.ent.gz | 699.3 KB | Display | PDB format |
PDBx/mmJSON format | 5okd.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/ok/5okd ftp://data.pdbj.org/pub/pdb/validation_reports/ok/5okd | HTTPS FTP |
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-Related structure data
Related structure data | 4286C 4288C 4292C 6fo0C 6fo2C 6fo6C 4d6tS S: Starting model for refinement C: citing same article (ref.) |
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Similar structure data |
-Links
-Assembly
Deposited unit |
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1 |
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Unit cell |
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Components on special symmetry positions |
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-Components
-Cytochrome b-c1 complex subunit ... , 8 types, 8 molecules ABEFGHIJ
#1: Protein | Mass: 52840.461 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Bos taurus (cattle) / References: UniProt: P31800 |
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#2: Protein | Mass: 48203.434 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Bos taurus (cattle) / References: UniProt: P23004 |
#5: Protein | Mass: 21640.580 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Bos taurus (cattle) / References: UniProt: P13272, quinol-cytochrome-c reductase |
#6: Protein | Mass: 13502.387 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Bos taurus (cattle) / References: UniProt: P00129 |
#7: Protein | Mass: 9737.223 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Bos taurus (cattle) / References: UniProt: P13271 |
#8: Protein | Mass: 10638.744 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Bos taurus (cattle) / References: UniProt: P00126 |
#9: Protein/peptide | Mass: 4898.645 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Bos taurus (cattle) / References: UniProt: P13272, quinol-cytochrome-c reductase |
#10: Protein | Mass: 7469.621 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Bos taurus (cattle) / References: UniProt: P00130 |
-Protein , 2 types, 2 molecules CD
#3: Protein | Mass: 42620.340 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Bos taurus (cattle) / References: UniProt: P00157 |
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#4: Protein | Mass: 35343.770 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Bos taurus (cattle) / References: UniProt: P00125 |
-Sugars , 1 types, 1 molecules
#16: Sugar | ChemComp-LMT / |
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-Non-polymers , 11 types, 104 molecules
#11: Chemical | #12: Chemical | ChemComp-6PE / | #13: Chemical | ChemComp-CDL / #14: Chemical | #15: Chemical | ChemComp-9XE / | #17: Chemical | #18: Chemical | ChemComp-HEC / | #19: Chemical | ChemComp-PO4 / #20: Chemical | ChemComp-FES / | #21: Chemical | ChemComp-PX4 / | #22: Water | ChemComp-HOH / | |
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-Experimental details
-Experiment
Experiment | Method: X-RAY DIFFRACTION / Number of used crystals: 1 |
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-Sample preparation
Crystal | Density Matthews: 4.41 Å3/Da / Density % sol: 72.08 % / Description: Bipyramidal red |
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Crystal grow | Temperature: 277 K / Method: vapor diffusion, hanging drop Details: Protein 40mg/mL with 1.6% HECAMEG; reservoir solution 50mM KPi pH 6.8, 100mM NaCl, 3mM NaN3, 10-13% PEG4000 |
-Data collection
Diffraction | Mean temperature: 100 K |
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Diffraction source | Source: SYNCHROTRON / Site: Diamond / Beamline: I03 / Wavelength: 1 Å |
Detector | Type: DECTRIS PILATUS 6M / Detector: PIXEL / Date: Feb 27, 2017 / Details: mirrors |
Radiation | Monochromator: Si111 / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray |
Radiation wavelength | Wavelength: 1 Å / Relative weight: 1 |
Reflection | Resolution: 3.1→89 Å / Num. obs: 80268 / % possible obs: 99.5 % / Redundancy: 7.4 % / Biso Wilson estimate: 71.303 Å2 / CC1/2: 0.977 / Rmerge(I) obs: 0.104 / Rpim(I) all: 0.043 / Net I/σ(I): 12.3 |
Reflection shell | Resolution: 3.1→3.16 Å / Redundancy: 7.5 % / Rmerge(I) obs: 1.126 / Mean I/σ(I) obs: 1.8 / Num. unique obs: 4428 / CC1/2: 0.572 / Rpim(I) all: 0.655 / % possible all: 99.9 |
-Processing
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Refinement | Method to determine structure: MOLECULAR REPLACEMENT Starting model: 4d6t Resolution: 3.1→31.76 Å / Cor.coef. Fo:Fc: 0.936 / Cor.coef. Fo:Fc free: 0.915 / SU B: 37.897 / SU ML: 0.295 / Cross valid method: THROUGHOUT / ESU R: 0.821 / ESU R Free: 0.353 / Stereochemistry target values: MAXIMUM LIKELIHOOD / Details: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
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Solvent computation | Ion probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.2 Å / Solvent model: MASK | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Displacement parameters | Biso mean: 101.1 Å2
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Refinement step | Cycle: 1 / Resolution: 3.1→31.76 Å
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