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- PDB-1l3s: Crystal Structure of Bacillus DNA Polymerase I Fragment complexed... -
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Open data
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Basic information
Entry | Database: PDB / ID: 1l3s | |||||||||
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Title | Crystal Structure of Bacillus DNA Polymerase I Fragment complexed to 9 base pairs of duplex DNA. | |||||||||
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![]() | TRANSFERASE/DNA / DNA Polymerase I / DNA Replication / Klenow Fragment / Protein-DNA Complex / TRANSFERASE-DNA COMPLEX | |||||||||
Function / homology | ![]() 5'-3' exonuclease activity / 3'-5' exonuclease activity / DNA-templated DNA replication / double-strand break repair / DNA-directed DNA polymerase / DNA-directed DNA polymerase activity / DNA binding Similarity search - Function | |||||||||
Biological species | ![]() ![]() | |||||||||
Method | ![]() ![]() ![]() | |||||||||
![]() | Johnson, S.J. / Taylor, J.S. / Beese, L.S. | |||||||||
![]() | ![]() Title: Processive DNA synthesis observed in a polymerase crystal suggests a mechanism for the prevention of frameshift mutations Authors: Johnson, S.J. / Taylor, J.S. / Beese, L.S. #1: ![]() Title: Visualizing DNA Replication in a Catalytically Active Bacillus DNA Polymerase Crystal Authors: Kiefer, J.R. / Mao, C. / Braman, J.C. / Beese, L.S. #2: ![]() Title: Crystal structure of a thermostable Bacillus DNA polymerase I large fragment at 2.1 A resolution Authors: Kiefer, J.R. / Mao, C. / Hansen, C.J. / Basehore, S.L. / Hogrefe, H.H. / Braman, J.C. / Beese, L.S. | |||||||||
History |
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Remark 999 | SEQUENCE The DNA polymerase gene was cloned from an organism that was classified as a thermostable ...SEQUENCE The DNA polymerase gene was cloned from an organism that was classified as a thermostable strain of Bacillus stearothermophilus by ribosomal RNA sequencing. However, this particular gene has much greater homology with the analogous gene from Bacillus caldotenax. The sequence matches residues 297-877 of SwissProt entry, Q04957, whose source is Bacillus caldotenax. There are 6 discrepancies with the Q04957 entry, at residues 456, 505, 512, 550, and 823, as well as a deletion of SwissProt residue number 576. |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 160.9 KB | Display | ![]() |
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PDB format | ![]() | 118.4 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 1.2 MB | Display | ![]() |
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Full document | ![]() | 1.2 MB | Display | |
Data in XML | ![]() | 28.4 KB | Display | |
Data in CIF | ![]() | 43.7 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 1l3tC ![]() 1l3uC ![]() 1l3vC ![]() 1l5uC ![]() 1lv5C ![]() 2bdpS C: citing same article ( S: Starting model for refinement |
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Similar structure data |
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Links
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Assembly
Deposited unit | ![]()
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1 |
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Unit cell |
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Details | Exists as a monomer. One molecule per asymmetric unit. |
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Components
-DNA chain , 2 types, 2 molecules BC
#1: DNA chain | Mass: 2740.812 Da / Num. of mol.: 1 / Source method: obtained synthetically / Details: primer strand |
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#2: DNA chain | Mass: 4923.204 Da / Num. of mol.: 1 / Source method: obtained synthetically / Details: template strand |
-Protein / Sugars , 2 types, 3 molecules A
#3: Protein | Mass: 66172.844 Da / Num. of mol.: 1 Fragment: Bacillus Fragment (analogous to the E. coli Klenow Fragment) Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() Description: This protein was isolated from an as yet unnamed novel strain of Bacillus stearothermophilus (see Ref 2). Production host: ![]() ![]() |
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#4: Polysaccharide |
-Non-polymers , 3 types, 566 molecules 




#5: Chemical | ChemComp-SO4 / #6: Chemical | ChemComp-MG / | #7: Water | ChemComp-HOH / | |
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-Experimental details
-Experiment
Experiment | Method: ![]() |
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Sample preparation
Crystal | Density Matthews: 2.88 Å3/Da / Density % sol: 57.32 % | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Crystal grow | Temperature: 290 K / Method: vapor diffusion, hanging drop / pH: 5.8 Details: Ammonium Sulfate, magnesium chloride, MPD, MES, pH 5.8, VAPOR DIFFUSION, HANGING DROP, temperature 290K | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Components of the solutions |
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Crystal grow | *PLUS | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Components of the solutions | *PLUS
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-Data collection
Diffraction |
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Diffraction source |
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Detector |
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Radiation |
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Radiation wavelength |
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Reflection | Resolution: 1.7→50 Å / Num. all: 92210 / Num. obs: 83559 / % possible obs: 87.8 % / Observed criterion σ(I): -3 / Redundancy: 6.4 % / Biso Wilson estimate: 14.6 Å2 / Rmerge(I) obs: 0.071 / Net I/σ(I): 15.9 | ||||||||||||||||||
Reflection shell | Resolution: 1.7→1.76 Å / Redundancy: 3.5 % / Rmerge(I) obs: 0.282 / Mean I/σ(I) obs: 1.7 / Num. unique all: 7938 / % possible all: 84.4 | ||||||||||||||||||
Reflection | *PLUS Highest resolution: 1.7 Å / Lowest resolution: 50 Å / Num. obs: 92210 / % possible obs: 82.7 % / Num. measured all: 592378 | ||||||||||||||||||
Reflection shell | *PLUS % possible obs: 50.3 % / Rmerge(I) obs: 0.29 |
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Processing
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Refinement | Method to determine structure: ![]() Starting model: PDB ENTRY 2BDP Resolution: 1.7→50 Å / Rfactor Rfree error: 0.004 / Data cutoff high absF: 2043592.89 / Data cutoff low absF: 0 / Isotropic thermal model: RESTRAINED / Cross valid method: THROUGHOUT / σ(F): 2 / Stereochemistry target values: Engh & Huber Details: The Bacillus polymerase was co-crystallized with a DNA containing a 9 base pair duplex and a 6 base 5' template overhang. The last two bases of the overhang are disordered and are not ...Details: The Bacillus polymerase was co-crystallized with a DNA containing a 9 base pair duplex and a 6 base 5' template overhang. The last two bases of the overhang are disordered and are not included in the model. A single base 3' overhang on the template strand (chain C) assured that the DNA duplex was not bound backwards by the polymerase during crystallization. Electron density was observed for all protein side chains except lysine 298, which was modelled to the beta carbon. The magnesium at position 920 was assigned due to the low refined b-factor and comparison with a related Klentaq polymerase structure (3KTQ). However, the resolution of the structure prevents a definitive assignment between water and magnesium.
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Solvent computation | Solvent model: FLAT MODEL / Bsol: 41.9 Å2 / ksol: 0.386 e/Å3 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Displacement parameters | Biso mean: 21.7 Å2
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Refine analyze |
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Refinement step | Cycle: LAST / Resolution: 1.7→50 Å
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Refine LS restraints |
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LS refinement shell | Resolution: 1.7→1.81 Å / Rfactor Rfree error: 0.015 / Total num. of bins used: 6
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Xplor file |
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Refinement | *PLUS Lowest resolution: 50 Å / % reflection Rfree: 5 % / Rfactor Rfree: 0.227 / Rfactor Rwork: 0.197 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Solvent computation | *PLUS | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Displacement parameters | *PLUS | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Refine LS restraints | *PLUS
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