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Open data
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Basic information
Entry | Database: PDB / ID: 1k8p | ||||||||||||||||||
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Title | Structure of the Human G-quadruplex reveals a novel topology | ||||||||||||||||||
![]() | 5'-D(*![]() DNA / quadruplex DNA / double chain reversal loop / dimeric quadruplex / Human telomere sequence / G(anti).G(anti).G(anti).G(anti) / parallel stranded | Function / homology | : / DNA / DNA (> 10) | ![]() Method | ![]() ![]() ![]() Parkinson, G.N. / Lee, M.P.H. / Neidle, S. | ![]() ![]() Title: Crystal structure of parallel quadruplexes from human telomeric DNA. Authors: Parkinson, G.N. / Lee, M.P. / Neidle, S. #1: ![]() Title: Crystal Structure of G-quadruplex Authors: Parkinson, G.N. / Lee, M.P.H. / Neidle, S. History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 25.2 KB | Display | ![]() |
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PDB format | ![]() | 16.9 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 358.2 KB | Display | ![]() |
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Full document | ![]() | 360.2 KB | Display | |
Data in XML | ![]() | 2.9 KB | Display | |
Data in CIF | ![]() | 3.6 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related 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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Components
#1: DNA chain | Mass: 3903.201 Da / Num. of mol.: 2 / Source method: obtained synthetically / Details: This sequence occurs naturally in humans #2: Chemical | #3: Chemical | ChemComp-NA / | #4: Water | ChemComp-HOH / | |
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-Experimental details
-Experiment
Experiment | Method: ![]() |
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Sample preparation
Crystal | Density Matthews: 2.4 Å3/Da / Density % sol: 48.77 % | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Crystal grow | Temperature: 286 K / Method: vapor diffusion, hanging drop / pH: 7 Details: MPD, KCl, LiCl, MgCl2, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 286K | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Components of the solutions |
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Crystal grow | *PLUS Temperature: 285 K / pH: 6.5 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Components of the solutions | *PLUS
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-Data collection
Diffraction | Mean temperature: 103 K |
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Diffraction source | Source: ![]() |
Detector | Type: RIGAKU RAXIS IV / Detector: IMAGE PLATE / Date: May 1, 2001 / Details: Osmic mirror |
Radiation | Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray |
Radiation wavelength | Wavelength: 1.5418 Å / Relative weight: 1 |
Reflection | Resolution: 2.4→26 Å / Num. all: 3130 / Num. obs: 2870 / % possible obs: 90.9 % / Observed criterion σ(I): 2 / Redundancy: 10 % / Rmerge(I) obs: 0.068 / Net I/σ(I): 15 |
Reflection shell | Resolution: 2.4→2.49 Å / Redundancy: 10 % / Rmerge(I) obs: 0.28 / Mean I/σ(I) obs: 9.6 / Num. unique all: 294 / % possible all: 99.7 |
Reflection | *PLUS Highest resolution: 2.4 Å / Num. obs: 3130 / % possible obs: 99.2 % / Num. measured all: 64877 |
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Processing
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Refinement | Method to determine structure: ![]()
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Refinement step | Cycle: LAST / Resolution: 2.4→10 Å
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Refine LS restraints |
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Software | *PLUS Name: SHELXL / Version: 97 / Classification: refinement | ||||||||||||||||||||
Refinement | *PLUS Lowest resolution: 10 Å / % reflection Rfree: 5 % / Rfactor obs: 0.186 / Rfactor Rfree: 0.261 / Rfactor Rwork: 0.186 | ||||||||||||||||||||
Solvent computation | *PLUS | ||||||||||||||||||||
Displacement parameters | *PLUS |