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- PDB-3em2: A bimolecular anti-parallel-stranded Oxytricha nova telomeric qua... -

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Basic information

Entry
Database: PDB / ID: 3em2
TitleA bimolecular anti-parallel-stranded Oxytricha nova telomeric quadruplex in complex with a 3,6-disubstituted acridine BSU-6038
Components5'-D(*DGP*DGP*DGP*DGP*DTP*DTP*DTP*DTP*DGP*DGP*DGP*DG)-3'
KeywordsDNA / quadruplex / Oxytricha nova / BSU-6038 / BSU6038 / anti-parallel / bimolecular / macromolecule / G-quadruplex
Function / homology: / 3,6-Bis[(3-morpholinopropionamido)] acridine / DNA / DNA (> 10)
Function and homology information
MethodX-RAY DIFFRACTION / MOLECULAR REPLACEMENT / Resolution: 2.3 Å
AuthorsCampbell, N.H. / Parkinson, G. / Neidle, S.
CitationJournal: Biochemistry / Year: 2009
Title: Selectivity in Ligand Recognition of G-Quadruplex Loops.
Authors: Campbell, N.H. / Patel, M. / Tofa, A.B. / Ghosh, R. / Parkinson, G.N. / Neidle, S.
History
DepositionSep 23, 2008Deposition site: RCSB / Processing site: RCSB
Revision 1.0Oct 14, 2008Provider: repository / Type: Initial release
Revision 1.1Jul 13, 2011Group: Version format compliance
Revision 1.2Sep 6, 2023Group: Data collection / Database references ...Data collection / Database references / Derived calculations / Refinement description
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_initial_refinement_model / struct_conn / struct_site
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _struct_conn.pdbx_dist_value / _struct_conn.ptnr1_auth_asym_id / _struct_conn.ptnr1_auth_comp_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr1_label_atom_id / _struct_conn.ptnr1_label_comp_id / _struct_conn.ptnr1_label_seq_id / _struct_conn.ptnr2_auth_asym_id / _struct_conn.ptnr2_auth_comp_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id / _struct_conn.ptnr2_label_atom_id / _struct_conn.ptnr2_label_comp_id / _struct_conn.ptnr2_label_seq_id / _struct_site.pdbx_auth_asym_id / _struct_site.pdbx_auth_comp_id / _struct_site.pdbx_auth_seq_id

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: 5'-D(*DGP*DGP*DGP*DGP*DTP*DTP*DTP*DTP*DGP*DGP*DGP*DG)-3'
B: 5'-D(*DGP*DGP*DGP*DGP*DTP*DTP*DTP*DTP*DGP*DGP*DGP*DG)-3'
hetero molecules


Theoretical massNumber of molelcules
Total (without water)8,2597
Polymers7,6112
Non-polymers6485
Water1,15364
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area1780 Å2
ΔGint5.5 kcal/mol
Surface area4150 Å2
MethodPISA
Unit cell
Length a, b, c (Å)55.231, 42.709, 26.844
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number18
Space group name H-MP21212

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Components

#1: DNA chain 5'-D(*DGP*DGP*DGP*DGP*DTP*DTP*DTP*DTP*DGP*DGP*DGP*DG)-3'


Mass: 3805.460 Da / Num. of mol.: 2 / Source method: obtained synthetically / Details: The sequence occurs naturally in Oxytricha nova
#2: Chemical
ChemComp-K / POTASSIUM ION


Mass: 39.098 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: K
#3: Chemical ChemComp-NCE / 3,6-Bis[(3-morpholinopropionamido)] acridine / N,N'-acridine-3,6-diylbis(3-morpholin-4-ylpropanamide)


Mass: 491.582 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C27H33N5O4
#4: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 64 / Source method: isolated from a natural source / Formula: H2O

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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: 2.08 Å3/Da / Density % sol: 40.86 %
Crystal growTemperature: 285.15 K / Method: vapor diffusion, hanging drop / pH: 7
Details: 2 microliter drops containing 5% v/v MPD, 0.50 mM DNA, 0.25 mM Ligand, 40 mM Potassium chloride, 5 mM Magnesium chloride, 4.1 mM Spermine equilibrated against 35% v/v MPD, pH 7.0, VAPOR ...Details: 2 microliter drops containing 5% v/v MPD, 0.50 mM DNA, 0.25 mM Ligand, 40 mM Potassium chloride, 5 mM Magnesium chloride, 4.1 mM Spermine equilibrated against 35% v/v MPD, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 285.15K
Components of the solutions
IDNameCrystal-IDSol-ID
1MPD11
2Potassium chloride11
3Magnesium chloride11
4Spermine11
5MPD12

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Data collection

DiffractionMean temperature: 105 K
Diffraction sourceSource: ROTATING ANODE / Type: RIGAKU RU200 / Wavelength: 1.5418 Å
DetectorType: RIGAKU RAXIS IV / Detector: IMAGE PLATE / Date: May 31, 2006 / Details: mirrors
RadiationMonochromator: Osmic mirrors / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.5418 Å / Relative weight: 1
ReflectionResolution: 2.3→33.79 Å / Num. all: 3093 / Num. obs: 3000 / % possible obs: 97 % / Observed criterion σ(I): 3 / Redundancy: 3.71 % / Biso Wilson estimate: 33.502 Å2 / Rmerge(I) obs: 0.057 / Net I/σ(I): 17.9
Reflection shellResolution: 2.3→2.38 Å / Redundancy: 3.59 % / Rmerge(I) obs: 0.173 / Mean I/σ(I) obs: 6.1 / Num. unique all: 303 / % possible all: 99.7

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Processing

Software
NameVersionClassification
CrystalCleardata collection
PHASERphasing
REFMAC5.2.0019refinement
d*TREKdata reduction
d*TREKdata scaling
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDB entry 1L1H

1l1h


Resolution: 2.3→27.62 Å / Cor.coef. Fo:Fc: 0.938 / Cor.coef. Fo:Fc free: 0.907 / SU B: 7.267 / SU ML: 0.176 / Isotropic thermal model: overall / Cross valid method: THROUGHOUT / ESU R: 0.369 / ESU R Free: 0.32 / Stereochemistry target values: MAXIMUM LIKELIHOOD
RfactorNum. reflection% reflectionSelection details
Rfree0.29342 144 4.8 %RANDOM
Rwork0.20255 ---
obs0.20706 3000 96.96 %-
Solvent computationIon probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.2 Å / Solvent model: BABINET MODEL WITH MASK
Displacement parametersBiso mean: 16.976 Å2
Baniso -1Baniso -2Baniso -3
1--1.05 Å20 Å20 Å2
2---1.04 Å20 Å2
3---2.09 Å2
Refinement stepCycle: LAST / Resolution: 2.3→27.62 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms0 506 40 64 610
Refine LS restraints
Refine-IDTypeDev idealDev ideal targetNumber
X-RAY DIFFRACTIONr_bond_refined_d0.0080.021608
X-RAY DIFFRACTIONr_angle_refined_deg2.1523.173934
X-RAY DIFFRACTIONr_chiral_restr0.0570.294
X-RAY DIFFRACTIONr_gen_planes_refined0.0060.02298
X-RAY DIFFRACTIONr_nbd_refined0.3260.2207
X-RAY DIFFRACTIONr_nbtor_refined0.2910.2337
X-RAY DIFFRACTIONr_xyhbond_nbd_refined0.1660.245
X-RAY DIFFRACTIONr_metal_ion_refined0.0910.28
X-RAY DIFFRACTIONr_symmetry_vdw_refined0.1620.221
X-RAY DIFFRACTIONr_symmetry_hbond_refined0.2110.210
LS refinement shellResolution: 2.3→2.359 Å / Total num. of bins used: 20
RfactorNum. reflection% reflection
Rfree0.378 12 -
Rwork0.254 205 -
obs--99.54 %

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