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- PDB-1p51: Anabaena HU-DNA cocrystal structure (AHU6) -

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Basic information

Entry
Database: PDB / ID: 1p51
TitleAnabaena HU-DNA cocrystal structure (AHU6)
Components
  • 5'-D(*GP*CP*AP*TP*AP*TP*CP*AP*AP*TP*TP*TP*GP*TP*TP*GP*CP*AP*T)-3'
  • DNA-binding protein HU
KeywordsDNA Binding Protein/DNA / protein-DNA complex / DNA bending / HU / DNA Binding Protein-DNA COMPLEX
Function / homology
Function and homology information


heterocyst development / chromosome condensation / structural constituent of chromatin / DNA binding / cytosol
Similarity search - Function
HU Protein; Chain A / IHF-like DNA-binding proteins / Histone-like DNA-binding protein, conserved site / Bacterial histone-like DNA-binding proteins signature. / Histone-like DNA-binding protein / Bacterial DNA-binding protein / bacterial (prokaryotic) histone like domain / Integration host factor (IHF)-like DNA-binding domain superfamily / Few Secondary Structures / Irregular
Similarity search - Domain/homology
DNA / DNA (> 10) / DNA-binding protein HU
Similarity search - Component
Biological speciesAnabaena sp. (bacteria)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 2.5 Å
AuthorsSwinger, K.K. / Lemberg, K.M. / Zhang, Y. / Rice, P.A.
CitationJournal: Embo J. / Year: 2003
Title: Flexible DNA bending in HU-DNA cocrystal structures
Authors: Swinger, K.K. / Lemberg, K.M. / Zhang, Y. / Rice, P.A.
History
DepositionApr 24, 2003Deposition site: RCSB / Processing site: RCSB
Revision 1.0May 13, 2003Provider: repository / Type: Initial release
Revision 1.1Apr 29, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Advisory / Version format compliance
Revision 1.3Aug 16, 2023Group: Data collection / Database references / Refinement description
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_initial_refinement_model
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
E: 5'-D(*GP*CP*AP*TP*AP*TP*CP*AP*AP*TP*TP*TP*GP*TP*TP*GP*CP*AP*T)-3'
F: 5'-D(*GP*CP*AP*TP*AP*TP*CP*AP*AP*TP*TP*TP*GP*TP*TP*GP*CP*AP*T)-3'
I: 5'-D(*GP*CP*AP*TP*AP*TP*CP*AP*AP*TP*TP*TP*GP*TP*TP*GP*CP*AP*T)-3'
H: 5'-D(*GP*CP*AP*TP*AP*TP*CP*AP*AP*TP*TP*TP*GP*TP*TP*GP*CP*AP*T)-3'
A: DNA-binding protein HU
B: DNA-binding protein HU
C: DNA-binding protein HU
D: DNA-binding protein HU


Theoretical massNumber of molelcules
Total (without water)63,5978
Polymers63,5978
Non-polymers00
Water1,29772
1
E: 5'-D(*GP*CP*AP*TP*AP*TP*CP*AP*AP*TP*TP*TP*GP*TP*TP*GP*CP*AP*T)-3'
F: 5'-D(*GP*CP*AP*TP*AP*TP*CP*AP*AP*TP*TP*TP*GP*TP*TP*GP*CP*AP*T)-3'
A: DNA-binding protein HU
B: DNA-binding protein HU


Theoretical massNumber of molelcules
Total (without water)31,7994
Polymers31,7994
Non-polymers00
Water724
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
2
I: 5'-D(*GP*CP*AP*TP*AP*TP*CP*AP*AP*TP*TP*TP*GP*TP*TP*GP*CP*AP*T)-3'
H: 5'-D(*GP*CP*AP*TP*AP*TP*CP*AP*AP*TP*TP*TP*GP*TP*TP*GP*CP*AP*T)-3'
C: DNA-binding protein HU
D: DNA-binding protein HU


Theoretical massNumber of molelcules
Total (without water)31,7994
Polymers31,7994
Non-polymers00
Water724
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)37.646, 107.836, 83.464
Angle α, β, γ (deg.)90.00, 92.25, 90.00
Int Tables number4
Space group name H-MP1211
DetailsThe functional complex is a protein homodimer bound to a DNA duplex. The assymetric unit contains two copies of the functional complex.

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Components

#1: DNA chain
5'-D(*GP*CP*AP*TP*AP*TP*CP*AP*AP*TP*TP*TP*GP*TP*TP*GP*CP*AP*T)-3'


Mass: 5809.782 Da / Num. of mol.: 4 / Source method: obtained synthetically
Details: chemically synthesized DNA with a 5' phosphate modification
#2: Protein
DNA-binding protein HU


Mass: 10089.584 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Anabaena sp. (bacteria) / Gene: HUP OR HANA OR ASR3935 / Plasmid: pET21a (pETAHU) / Production host: Escherichia coli (E. coli) / Strain (production host): RJ1878 lacks functional HU genes / References: UniProt: P05514
#3: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 72 / 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: 2.75 Å3/Da / Density % sol: 54.94 %
Crystal growTemperature: 292 K / Method: vapor diffusion, hanging drop / pH: 8
Details: Peg 5000 monomethyl ether, glycerol, tris, jeffamine, potassium chloride, calcium chloride, sodium azide, pH 8.0, VAPOR DIFFUSION, HANGING DROP, temperature 292K
Components of the solutions
IDNameCrystal-IDSol-ID
1Peg 500011
2monomethyl ether11
3glycerol11
4tris11
5jeffamine11
6potassium chloride11
7calcium chloride11
8sodium azide11
9H2O11
10Peg 500012
11glycerol12
12potassium chloride12
13calcium chloride12
14sodium azide12
15H2O12
Crystal grow
*PLUS
pH: 7.5
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-IDChemical formulaDetails
150 mM1reservoirKCl
210 %glycerol1reservoir
350 mMTris1reservoirpH7.5 or pH8.0
40.02 %1reservoirNaN3
51 %Jaffamine1reservoirpH7.0
612-22.5 %PEG5000 MME1reservoir
710 mM1reservoirCaCl2
81
91
101
111
121
131
141
151

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: APS / Beamline: 14-BM-C / Wavelength: 0.9 Å
DetectorType: ADSC QUANTUM 4 / Detector: CCD / Date: Mar 29, 2002
RadiationMonochromator: Ge 111 / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.9 Å / Relative weight: 1
ReflectionResolution: 2.48→99 Å / Num. all: 23324 / Num. obs: 23324 / % possible obs: 93.3 % / Observed criterion σ(I): -3 / Redundancy: 3 % / Rmerge(I) obs: 0.107
Reflection shellResolution: 2.48→2.57 Å / Redundancy: 2.2 % / Rmerge(I) obs: 0.359 / % possible all: 46.5
Reflection
*PLUS
Lowest resolution: 99 Å / Rmerge(I) obs: 0.11

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Processing

Software
NameVersionClassification
REFMAC5.1.24refinement
DENZOdata reduction
SCALEPACKdata scaling
EPMRphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDB ENTRY 1P71 with nonidentical sidechains pruned back to a common atom
Resolution: 2.5→25 Å / Cor.coef. Fo:Fc: 0.821 / Cor.coef. Fo:Fc free: 0.751 / SU B: 18.487 / SU ML: 0.417 / TLS residual ADP flag: LIKELY RESIDUAL
Isotropic thermal model: restrained individual isotropic (after TLS refinement)
Cross valid method: THROUGHOUT / σ(F): 0 / ESU R Free: 0.477
Details: Data is anisotropic with limits 2.5 x 2.5 x 2.8. Data were truncated to an ellipsoid and reflections with an average (I/sigI) ratio less than 2 were removed. The completeness above is ...Details: Data is anisotropic with limits 2.5 x 2.5 x 2.8. Data were truncated to an ellipsoid and reflections with an average (I/sigI) ratio less than 2 were removed. The completeness above is underestimated. When the truncation is factored in, data in refinement are 91% complete.
RfactorNum. reflection% reflectionSelection details
Rfree0.338 1828 9.8 %RANDOM
Rwork0.286 ---
obs0.291 16900 81.39 %-
all-23042 --
Solvent computationIon probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.4 Å / Solvent model: BABINET MODEL WITH MASK
Displacement parametersBiso mean: 28.115 Å2
Baniso -1Baniso -2Baniso -3
1--1.44 Å20 Å20.09 Å2
2---0.62 Å20 Å2
3---2.07 Å2
Refinement stepCycle: LAST / Resolution: 2.5→25 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms2767 1556 0 72 4395
Refine LS restraints
Refine-IDTypeDev idealDev ideal targetNumber
X-RAY DIFFRACTIONr_bond_refined_d0.0050.0224535
X-RAY DIFFRACTIONr_angle_refined_deg0.9272.4046435
X-RAY DIFFRACTIONr_dihedral_angle_1_deg3.5115364
X-RAY DIFFRACTIONr_chiral_restr0.0460.2664
X-RAY DIFFRACTIONr_gen_planes_refined0.0020.022832
X-RAY DIFFRACTIONr_nbd_refined0.1750.21770
X-RAY DIFFRACTIONr_xyhbond_nbd_refined0.1240.2186
X-RAY DIFFRACTIONr_symmetry_vdw_refined0.1570.248
X-RAY DIFFRACTIONr_symmetry_hbond_refined0.1360.28
X-RAY DIFFRACTIONr_mcbond_it0.4311.51831
X-RAY DIFFRACTIONr_mcangle_it0.8122939
X-RAY DIFFRACTIONr_scbond_it0.89432704
X-RAY DIFFRACTIONr_scangle_it1.6684.53496
LS refinement shellResolution: 2.5→2.635 Å / Total num. of bins used: 20 /
RfactorNum. reflection
Rfree0.39 72
Rwork0.31 140
Refinement TLS params.

Method: refined / Refine-ID: X-RAY DIFFRACTION

IDL112)L122)L132)L222)L232)L332)S11 (Å °)S12 (Å °)S13 (Å °)S21 (Å °)S22 (Å °)S23 (Å °)S31 (Å °)S32 (Å °)S33 (Å °)T112)T122)T132)T222)T232)T332)Origin x (Å)Origin y (Å)Origin z (Å)
11.3324-0.1824-0.60871.9985-0.79821.1348-0.0561-0.1089-0.136-0.1734-0.05740.03770.11030.02580.11350.28920.0010.02530.2728-0.00040.31857.82985.38217.2572
24.824-0.7030.51861.7330.0590.78360.0714-0.1070.7545-0.0201-0.0559-0.2528-0.0024-0.052-0.01550.2417-0.0113-0.00450.2628-0.03550.43427.777727.039759.9312
30.8123-3.1444-3.16922.02180.6734-3.76090.0759-0.02180.21150.40480.19-0.37980.53750.2416-0.26590.4645-0.0386-0.06580.28070.01830.349821.217930.511128.5245
44.35381.3031-2.052-0.00450.9623.81060.0030.181-0.06-0.30510.02580.0592-0.1621-0.289-0.02880.3408-0.0075-0.02180.3342-0.03610.2477-5.476632.159111.227
55.7687-0.16852.9875-3.5416-2.03050.43490.01570.20330.3075-0.1793-0.01250.4080.17060.7276-0.00320.44730.0507-0.00070.24150.05190.274920.75610.745852.0494
62.40411.88474.15654.7171-0.82024.9840.2123-0.06490.2357-0.07760.0550.12140.47460.1753-0.26730.32110.03990.03230.2886-0.00360.3101-5.7612.030169.3889
71.3820.4081-3.539-0.72630.83528.78360.6462-0.74330.3504-0.0064-0.53710.1724-0.12490.408-0.10910.4957-0.0195-0.03790.14030.22460.413312.496924.877938.4396
80.33731.31611.6508-2.1982-0.542.40370.14490.0625-0.10770.0923-0.0614-0.1468-0.0744-0.0801-0.08350.40240.0566-0.04940.3776-0.0120.29377.754233.000320.1204
9-4.1065-10.9281-4.143510.79073.62794.88410.54680.7105-0.3362-0.1443-0.2493-0.6014-0.1406-0.2549-0.29750.41120.039-0.03490.5318-0.01990.26952.528829.0493-0.6332
1011.3236-10.85786.2548.938-6.016-0.73170.18190.7231-0.1545-0.1361-0.12970.60.2820.4575-0.05210.3858-0.00730.0540.4154-0.0570.193712.06894.65740.6155
11-0.2713-0.1199-1.0482-2.1532-0.28883.08410.2961-0.0450.07850.11460.02030.0326-0.1105-0.0222-0.31640.39930.0130.05430.34480.00090.31187.8106-0.318261.0571
124.99995.68183.40399.729811.5854-4.823-0.49040.5455-0.0204-0.14510.3518-0.06620.326-0.22650.13850.3759-0.05010.06930.47540.15570.34491.12978.716779.4664
Refinement TLS group
IDRefine-IDRefine TLS-IDAuth asym-IDLabel asym-IDAuth seq-IDLabel seq-ID
1X-RAY DIFFRACTION1AE1 - 531 - 53
2X-RAY DIFFRACTION1BF1 - 531 - 53
3X-RAY DIFFRACTION1AE76 - 9276 - 92
4X-RAY DIFFRACTION1BF76 - 9276 - 92
5X-RAY DIFFRACTION2CG1 - 531 - 53
6X-RAY DIFFRACTION2DH1 - 531 - 53
7X-RAY DIFFRACTION2CG76 - 9276 - 92
8X-RAY DIFFRACTION2DH76 - 9276 - 92
9X-RAY DIFFRACTION3AE54 - 7554 - 75
10X-RAY DIFFRACTION4BF54 - 7554 - 75
11X-RAY DIFFRACTION5CG54 - 7554 - 75
12X-RAY DIFFRACTION6DH54 - 7554 - 75
13X-RAY DIFFRACTION7EA2 - 51 - 4
14X-RAY DIFFRACTION7FB16 - 1815 - 17
15X-RAY DIFFRACTION8EA6 - 155 - 14
16X-RAY DIFFRACTION8FB6 - 155 - 14
17X-RAY DIFFRACTION9EA16 - 1815 - 17
18X-RAY DIFFRACTION9FB2 - 51 - 4
19X-RAY DIFFRACTION10IC2 - 51 - 4
20X-RAY DIFFRACTION10HD16 - 1815 - 17
21X-RAY DIFFRACTION11IC6 - 155 - 14
22X-RAY DIFFRACTION11HD6 - 155 - 14
23X-RAY DIFFRACTION12IC16 - 1815 - 17
24X-RAY DIFFRACTION12HD2 - 51 - 4
Refinement
*PLUS
Highest resolution: 2.5 Å / Lowest resolution: 25 Å / % reflection Rfree: 10 %
Solvent computation
*PLUS
Displacement parameters
*PLUS
Refine LS restraints
*PLUS
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONr_bond_d0.005
X-RAY DIFFRACTIONr_angle_d0.927

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