1HK9

Crystal structure of the Hfq protein from Escherichia coli


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 1KQ1PDB ENTRY 1KQ1

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, SITTING DROP4.6293CRYSTALS WERE OBTAINED BY VAPOR DIFFUSION IN 2UL SITTING DROPS. THE RESERVOIR CONTAINED 25% PEG 4000, 0.2 M NH4-ACETATE AND 0.2 M NA-ACETATE PH 4.6. CRYSTALLIZATION WERE CARRIED OUT AT 20C.
Crystal Properties
Matthews coefficientSolvent content
1.8333

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 61.35α = 90
b = 61.35β = 90
c = 166.1γ = 120
Symmetry
Space GroupP 61

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray110CCDMARRESEARCH2002-07-15MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONELETTRA BEAMLINE 5.2RELETTRA5.2R

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Merge I (Observed)Net I Over Average Sigma (I)RedundancyNumber Reflections (All)Number Reflections (Observed)Observed Criterion Sigma (F)Observed Criterion Sigma (I)B (Isotropic) From Wilson Plot
12.15471000.09812.97.21921118.5
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)R Merge I (Observed)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
12.152.2196.50.274.5

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodStarting modelResolution (High)Resolution (Low)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTTHROUGHOUTPDB ENTRY 1KQ12.152019131161599.80.2080.2080.262RANDOM20.7
Temperature Factor Modeling
Anisotropic B[1][1]Anisotropic B[1][2]Anisotropic B[1][3]Anisotropic B[2][2]Anisotropic B[2][3]Anisotropic B[3][3]
-4.571.7-4.579.14
RMS Deviations
KeyRefinement Restraint Deviation
c_dihedral_angle_d25.4
c_scangle_it4.55
c_scbond_it3.11
c_mcangle_it2.79
c_mcbond_it1.85
c_angle_deg1.6
c_improper_angle_d1.02
c_bond_d0.01
c_bond_d_na
c_bond_d_prot
RMS Deviations
KeyRefinement Restraint Deviation
c_dihedral_angle_d25.4
c_scangle_it4.55
c_scbond_it3.11
c_mcangle_it2.79
c_mcbond_it1.85
c_angle_deg1.6
c_improper_angle_d1.02
c_bond_d0.01
c_bond_d_na
c_bond_d_prot
c_angle_d
c_angle_d_na
c_angle_d_prot
c_angle_deg_na
c_angle_deg_prot
c_dihedral_angle_d_na
c_dihedral_angle_d_prot
c_improper_angle_d_na
c_improper_angle_d_prot
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms3104
Nucleic Acid Atoms
Solvent Atoms136
Heterogen Atoms

Software

Software
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing