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Yorodumi- PDB-3tpz: 2.1 Angstrom crystal structure of the L114P mutant of E. Coli KsgA -
+Open data
-Basic information
Entry | Database: PDB / ID: 3tpz | ||||||
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Title | 2.1 Angstrom crystal structure of the L114P mutant of E. Coli KsgA | ||||||
Components | Ribosomal RNA small subunit methyltransferase A | ||||||
Keywords | TRANSFERASE / rRNA adenine dimethyltransferase / ribogenesis | ||||||
Function / homology | Function and homology information 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase / 16S rRNA (adenine(1518)-N(6)/adenine(1519)-N(6))-dimethyltransferase activity / rRNA (adenine-N6,N6-)-dimethyltransferase activity / rRNA base methylation / rRNA methylation / ribosomal small subunit binding / maturation of SSU-rRNA / ribosomal small subunit assembly / rRNA processing / double-stranded DNA binding ...16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase / 16S rRNA (adenine(1518)-N(6)/adenine(1519)-N(6))-dimethyltransferase activity / rRNA (adenine-N6,N6-)-dimethyltransferase activity / rRNA base methylation / rRNA methylation / ribosomal small subunit binding / maturation of SSU-rRNA / ribosomal small subunit assembly / rRNA processing / double-stranded DNA binding / response to antibiotic / mRNA binding / cytosol Similarity search - Function | ||||||
Biological species | Escherichia coli (E. coli) | ||||||
Method | X-RAY DIFFRACTION / MOLECULAR REPLACEMENT / Resolution: 2.1 Å | ||||||
Authors | Scarsdale, J.N. / Musayev, F.N. / Rife, J.P. | ||||||
Citation | Journal: Biochemistry / Year: 2012 Title: Control of Substrate Specificity by a Single Active Site Residue of the KsgA Methyltransferase. Authors: O'Farrell, H.C. / Musayev, F.N. / Scarsdale, J.N. / Rife, J.P. #1: Journal: Biochemistry / Year: 2010 Title: Binding of adenosine-based ligands to the MjDim1 rRNA methyltransferase: implications for reaction mechanism and drug design. Authors: O'Farrell, H.C. / Musayev, F.N. / Scarsdale, J.N. / Rife, J.P. #2: Journal: J.Mol.Biol. / Year: 2009 Title: Structural and functional divergence within the Dim1/KsgA family of rRNA methyltransferases. Authors: Pulicherla, N. / Pogorzala, L.A. / Xu, Z. / O Farrell, H.C. / Musayev, F.N. / Scarsdale, J.N. / Sia, E.A. / Culver, G.M. / Rife, J.P. #3: Journal: J.Mol.Biol. / Year: 2004 Title: Crystal structure of KsgA, a universally conserved rRNA adenine dimethyltransferase in Escherichia coli. Authors: O'Farrell, H.C. / Scarsdale, J.N. / Rife, J.P. | ||||||
History |
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-Structure visualization
Structure viewer | Molecule: MolmilJmol/JSmol |
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-Downloads & links
-Download
PDBx/mmCIF format | 3tpz.cif.gz | 216.1 KB | Display | PDBx/mmCIF format |
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PDB format | pdb3tpz.ent.gz | 173 KB | Display | PDB format |
PDBx/mmJSON format | 3tpz.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/tp/3tpz ftp://data.pdbj.org/pub/pdb/validation_reports/tp/3tpz | HTTPS FTP |
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-Related structure data
Related structure data | 1qyrS S: Starting model for refinement |
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Similar structure data |
-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
#1: Protein | Mass: 30436.049 Da / Num. of mol.: 2 / Mutation: L114P Source method: isolated from a genetically manipulated source Source: (gene. exp.) Escherichia coli (E. coli) / Strain: K12 / Gene: b0051, JW0050, ksgA, rsmA / Plasmid: pET15b / Production host: Escherichia coli (E. coli) / Strain (production host): BL21(DE3) References: UniProt: P06992, 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase #2: Chemical | #3: Chemical | ChemComp-PO4 / | #4: 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: 2.43 Å3/Da / Density % sol: 49.47 % |
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Crystal grow | Temperature: 293 K / Method: vapor diffusion, hanging drop / pH: 7.4 Details: protein solution: 10 mg/mL ecKsgA, 50 mM Tris, pH 7.4, 50 mM ammonium chloride, 6 mM BME, reservoir solution: 80 mM MES/sodium, pH 6.5, 25% PEG5000 MME, 0.15 M ammonium sulfate , VAPOR ...Details: protein solution: 10 mg/mL ecKsgA, 50 mM Tris, pH 7.4, 50 mM ammonium chloride, 6 mM BME, reservoir solution: 80 mM MES/sodium, pH 6.5, 25% PEG5000 MME, 0.15 M ammonium sulfate , VAPOR DIFFUSION, HANGING DROP, temperature 293K |
-Data collection
Diffraction | Mean temperature: 100 K |
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Diffraction source | Source: ROTATING ANODE / Type: RIGAKU MICROMAX-007 / Wavelength: 1.5418 Å |
Detector | Type: RIGAKU RAXIS IV++ / Detector: IMAGE PLATE / Date: Nov 28, 2008 / Details: Rigaku Varimax Confocal Optics |
Radiation | Monochromator: Rigaku varimax confocal optics / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray |
Radiation wavelength | Wavelength: 1.5418 Å / Relative weight: 1 |
Reflection | Resolution: 2.1→34.65 Å / Num. all: 34870 / Num. obs: 33415 / % possible obs: 95 % / Redundancy: 3.98 % / Biso Wilson estimate: 37.8 Å2 / Rmerge(I) obs: 0.064 / Net I/σ(I): 12.7 |
Reflection shell | Resolution: 2.1→2.18 Å / Redundancy: 3.95 % / Rmerge(I) obs: 0.335 / Mean I/σ(I) obs: 4 / Num. unique all: 3446 / % possible all: 93.9 |
-Processing
Software |
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Refinement | Method to determine structure: MOLECULAR REPLACEMENT Starting model: PDB ENTRY 1QYR Resolution: 2.1→28 Å / Cor.coef. Fo:Fc: 0.954 / Cor.coef. Fo:Fc free: 0.913 / SU B: 16.323 / SU ML: 0.19 / Cross valid method: THROUGHOUT / σ(F): 0 / ESU R: 0.262 / ESU R Free: 0.227 / Stereochemistry target values: MAXIMUM LIKELIHOOD / Details: U VALUES : WITH TLS ADDED
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Solvent computation | Ion probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.4 Å / Solvent model: BABINET MODEL WITH MASK | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Displacement parameters | Biso mean: 40.461 Å2
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Refine analyze | Luzzati coordinate error obs: 0.348 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Refinement step | Cycle: LAST / Resolution: 2.1→28 Å
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Refine LS restraints |
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LS refinement shell | Resolution: 2.1→2.154 Å / Total num. of bins used: 20
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Refinement TLS params. | Method: refined / Refine-ID: X-RAY DIFFRACTION
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Refinement TLS group |
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