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- PDB-4r47: Racemic crystal structure of a bimolecular DNA G-quadruplex (P21/n) -

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Entry
Database: PDB / ID: 4r47
TitleRacemic crystal structure of a bimolecular DNA G-quadruplex (P21/n)
Components5'-D(*GP*GP*GP*GP*TP*TP*TP*TP*GP*GP*GP*G)-3'
KeywordsDNA / racemic DNA / racemates
Biological speciessynthetic construct (others)
MethodX-RAY DIFFRACTION / MOLECULAR REPLACEMENT / Resolution: 1.85 Å
AuthorsMandal, P.K. / Collie, G.W. / Kauffmann, B. / Huc, I.
CitationJournal: Angew.Chem.Int.Ed.Engl. / Year: 2014
Title: Racemic DNA crystallography.
Authors: Mandal, P.K. / Collie, G.W. / Kauffmann, B. / Huc, I.
Validation Report
SummaryFull reportAbout validation report
DateDeposition: Aug 19, 2014 / Release: Nov 12, 2014
RevisionDateData content typeGroupProviderType
1.0Nov 12, 2014Structure modelrepositoryInitial release
1.1Jan 14, 2015Structure modelDatabase references

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Structure visualization

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Assembly

Deposited unit
A: 5'-D(*GP*GP*GP*GP*TP*TP*TP*TP*GP*GP*GP*G)-3'
B: 5'-D(*GP*GP*GP*GP*TP*TP*TP*TP*GP*GP*GP*G)-3'
hetero molecules


Theoretical massNumber of molelcules
Total (without water)7,87910
Polymers7,6112
Non-polymers2688
Water2,720151
1


TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
γ
α
β
Length a, b, c (Å)28.500, 47.300, 46.800
Angle α, β, γ (deg.)90.00, 97.02, 90.00
Int Tables number14
Space group name H-MP121/n1
Components on special symmetry positions
IDModelComponents
11A-1105-

MG

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Components

#1: DNA chain 5'-D(*GP*GP*GP*GP*TP*TP*TP*TP*GP*GP*GP*G)-3'


Mass: 3805.460 Da / Num. of mol.: 2 / Details: Bimolecular G-Quadruplex / Source method: obtained synthetically / Source: (synth.) synthetic construct (others)
#2: Chemical
ChemComp-K / POTASSIUM ION


Mass: 39.098 Da / Num. of mol.: 5 / Source method: obtained synthetically / Formula: K / Potassium
#3: Chemical ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: Mg / Magnesium
#4: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 151 / Source method: isolated from a natural source / Formula: H2O / Water

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Experimental details

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Experiment

ExperimentMethod: X-RAY DIFFRACTION / Number of used crystals: 1

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Sample preparation

CrystalDensity Matthews: 2.06 Å3/Da / Density % sol: 40.2 %
Crystal growTemperature: 285 K / Method: vapor diffusion, hanging drop / pH: 6.6
Details: 1 mM DNA, 50 mM potassium cacodylate, 40 mM potassium chloride, 75 mM magnesium chloride hexahydrate, 2.5 mM spermine, 5% v/v MPD, pH 6.6, VAPOR DIFFUSION, HANGING DROP, temperature 285K

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: ROTATING ANODE / Type: RIGAKU / Wavelength: 1.5418 Å
DetectorType: DECTRIS PILATUS 200K / Detector: PIXEL / Date: Nov 13, 2013
RadiationMonochromator: graphite / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.5418 Å / Relative weight: 1
ReflectionResolution: 1.85→24.28 Å / Num. all: 10338 / Num. obs: 9676 / % possible obs: 93.6 % / Observed criterion σ(F): 2 / Observed criterion σ(I): 2 / Redundancy: 1.9 % / Rmerge(I) obs: 0.0736 / Net I/σ(I): 10.25
Reflection shellResolution: 1.85→1.91 Å / Redundancy: 1.9 % / Rmerge(I) obs: 0.1591 / Mean I/σ(I) obs: 3.47 / % possible all: 96.52

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Processing

Software
NameVersionClassification
CrystalCleardata collection
PHASERphasing
REFMAC5.8.0049refinement
CrystalCleardata reduction
CrystalCleardata scaling
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDB ENTRY 1JRN
Resolution: 1.85→24.28 Å / Cor.coef. Fo:Fc: 0.915 / Cor.coef. Fo:Fc free: 0.897 / SU B: 2.511 / SU ML: 0.076 / Cross valid method: THROUGHOUT / ESU R: 0.171 / ESU R Free: 0.155 / Stereochemistry target values: MAXIMUM LIKELIHOOD / Details: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
RfactorNum. reflection% reflectionSelection details
Rfree0.30361 522 5.3 %RANDOM
Rwork0.28262 ---
Obs0.28373 9376 95.77 %-
All-9840 --
Solvent computationIon probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.2 Å / Solvent model: MASK
Displacement parametersBiso mean: 12.361 Å2
Baniso -1Baniso -2Baniso -3
1--0.33 Å20 Å2-0.17 Å2
2--0.27 Å20 Å2
3---0.1 Å2
Refinement stepCycle: LAST / Resolution: 1.85→24.28 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms0 506 8 151 665
Refine LS restraints

Refinement-ID: X-RAY DIFFRACTION

TypeDev idealDev ideal targetNumber
r_bond_refined_d0.0090.011568
r_bond_other_d
r_angle_refined_deg1.5251.136880
r_angle_other_deg
r_dihedral_angle_1_deg
r_dihedral_angle_2_deg
r_dihedral_angle_3_deg
r_dihedral_angle_4_deg
r_chiral_restr0.0960.272
r_gen_planes_refined0.0180.02272
r_gen_planes_other0.0020.02108
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_it
r_mcbond_other
r_mcangle_it
r_mcangle_other
r_scbond_it0.9220.932568
r_scbond_other
r_scangle_it
r_scangle_other
r_long_range_B_refined
r_long_range_B_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded
LS refinement shellResolution: 1.85→1.898 Å / Total num. of bins used: 20
RfactorNum. reflection% reflection
Rfree0.273 41 -
Rwork0.325 721 -
Obs--98.07 %

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