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Yorodumi- PDB-8uk9: Structure of T4 Bacteriophage clamp loader mutant D110C bound to ... -
+Open data
-Basic information
Entry | Database: PDB / ID: 8uk9 | ||||||
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Title | Structure of T4 Bacteriophage clamp loader mutant D110C bound to the T4 clamp, primer-template DNA, and ATP analog | ||||||
Components |
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Keywords | DNA BINDING PROTEIN/DNA / DNA Replication / AAA+ ATPase / Bacteriophage / Complex / DNA / DNA BINDING PROTEIN / DNA BINDING PROTEIN-DNA complex | ||||||
Function / homology | Function and homology information DNA clamp loader activity / bidirectional double-stranded viral DNA replication / viral DNA genome replication / DNA polymerase processivity factor activity / viral transcription / Hydrolases; Acting on acid anhydrides; Acting on acid anhydrides to facilitate cellular and subcellular movement / DNA replication / ATP hydrolysis activity / DNA binding / ATP binding Similarity search - Function | ||||||
Biological species | Tequatrovirus T4 | ||||||
Method | X-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 3.1 Å | ||||||
Authors | Marcus, K. / Ghaffari-Kashani, S. / Gee, C.L. | ||||||
Funding support | United States, 1items
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Citation | Journal: Nat Struct Mol Biol / Year: 2024 Title: Autoinhibition of a clamp-loader ATPase revealed by deep mutagenesis and cryo-EM. Authors: Kendra Marcus / Yongjian Huang / Subu Subramanian / Christine L Gee / Kent Gorday / Sam Ghaffari-Kashani / Xiao Ran Luo / Lisa Zheng / Michael O'Donnell / Sriram Subramaniam / John Kuriyan / Abstract: Clamp loaders are AAA+ ATPases that facilitate high-speed DNA replication. In eukaryotic and bacteriophage clamp loaders, ATP hydrolysis requires interactions between aspartate residues in one ...Clamp loaders are AAA+ ATPases that facilitate high-speed DNA replication. In eukaryotic and bacteriophage clamp loaders, ATP hydrolysis requires interactions between aspartate residues in one protomer, present in conserved 'DEAD-box' motifs, and arginine residues in adjacent protomers. We show that functional defects resulting from a DEAD-box mutation in the T4 bacteriophage clamp loader can be compensated by widely distributed single mutations in the ATPase domain. Using cryo-EM, we discovered an unsuspected inactive conformation of the clamp loader, in which DNA binding is blocked and the catalytic sites are disassembled. Mutations that restore function map to regions of conformational change upon activation, suggesting that these mutations may increase DNA affinity by altering the energetic balance between inactive and active states. Our results show that there are extensive opportunities for evolution to improve catalytic efficiency when an inactive intermediate is involved. | ||||||
History |
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-Structure visualization
Structure viewer | Molecule: MolmilJmol/JSmol |
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-Downloads & links
-Download
PDBx/mmCIF format | 8uk9.cif.gz | 1.8 MB | Display | PDBx/mmCIF format |
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PDB format | pdb8uk9.ent.gz | 1.5 MB | Display | PDB format |
PDBx/mmJSON format | 8uk9.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/uk/8uk9 ftp://data.pdbj.org/pub/pdb/validation_reports/uk/8uk9 | HTTPS FTP |
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-Related structure data
Related structure data | 8uh7C 8unfC 8unhC C: citing same article (ref.) |
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Similar structure data | Similarity search - Function & homologyF&H Search |
-Links
-Assembly
Deposited unit |
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1 |
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2 |
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Unit cell |
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-Components
-Sliding-clamp-loader ... , 2 types, 10 molecules AQBCDEKLMN
#1: Protein | Mass: 21391.703 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Tequatrovirus T4 / Gene: 62 / Production host: Escherichia coli (E. coli) / References: UniProt: P04527 #2: Protein | Mass: 35909.387 Da / Num. of mol.: 8 / Mutation: D110C Source method: isolated from a genetically manipulated source Source: (gene. exp.) Tequatrovirus T4 / Gene: 44 / Production host: Escherichia coli (E. coli) / References: UniProt: P04526 |
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-Protein , 1 types, 6 molecules FGHRST
#3: Protein | Mass: 24881.223 Da / Num. of mol.: 6 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Tequatrovirus T4 / Gene: 45 / Production host: Escherichia coli (E. coli) / References: UniProt: P04525 |
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-DNA chain , 2 types, 4 molecules IOJP
#4: DNA chain | Mass: 7347.733 Da / Num. of mol.: 2 / Source method: obtained synthetically / Source: (synth.) Tequatrovirus T4 #5: DNA chain | Mass: 6136.008 Da / Num. of mol.: 2 / Source method: obtained synthetically / Source: (synth.) Tequatrovirus T4 |
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-Non-polymers , 3 types, 22 molecules
#6: Chemical | ChemComp-AF3 / #7: Chemical | ChemComp-ADP / #8: Chemical | ChemComp-MG / |
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-Details
Has ligand of interest | Y |
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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: 2.82 Å3/Da / Density % sol: 56.31 % / Description: Rods |
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Crystal grow | Temperature: 298 K / Method: evaporation / pH: 6.5 / Details: 0.1M MES pH 6.5, 9% PEG MME 5000, 6% 1-Propanol |
-Data collection
Diffraction | Mean temperature: 100 K / Serial crystal experiment: N |
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Diffraction source | Source: SYNCHROTRON / Site: ALS / Beamline: 5.0.2 / Wavelength: 0.9794 Å |
Detector | Type: DECTRIS PILATUS3 6M / Detector: PIXEL / Date: Oct 31, 2021 |
Radiation | Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray |
Radiation wavelength | Wavelength: 0.9794 Å / Relative weight: 1 |
Reflection | Resolution: 3.1→48.13 Å / Num. obs: 106987 / % possible obs: 71.39 % / Redundancy: 2 % / CC1/2: 0.999 / CC star: 1 / Rmerge(I) obs: 0.05745 / Rpim(I) all: 0.05745 / Rrim(I) all: 0.08124 / Net I/σ(I): 5.8 |
Reflection shell | Resolution: 3.1→3.211 Å / Redundancy: 2 % / Rmerge(I) obs: 1.571 / Num. unique obs: 470 / CC1/2: 0.169 / Rpim(I) all: 1.571 / Rrim(I) all: 2.222 |
-Processing
Software |
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Refinement | Method to determine structure: MOLECULAR REPLACEMENT / Resolution: 3.1→48.13 Å / SU ML: 0.36 / Cross valid method: FREE R-VALUE / σ(F): 1.33 / Phase error: 31.77 / Stereochemistry target values: ML
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Solvent computation | Shrinkage radii: 0.9 Å / VDW probe radii: 1.11 Å / Solvent model: FLAT BULK SOLVENT MODEL | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Refinement step | Cycle: LAST / Resolution: 3.1→48.13 Å
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Refine LS restraints |
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LS refinement shell |
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