3EZH

Crystal Structure of the E. coli Histidine Kinase NarX Sensor Domain in Complex with Nitrate


X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION8.5277ammonium phosphate, pH 8.5, vapor diffusion, temperature 277K
Crystal Properties
Matthews coefficientSolvent content
2.2946.22

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 55.76α = 90
b = 55.76β = 90
c = 155.257γ = 90
Symmetry
Space GroupP 43 21 2

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCD2000-09-22MMAD
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONNSLS BEAMLINE X4A0.9673, 0.9786, 0.9794, 0.9904NSLSX4A

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
11.72598.40.04620.127197
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)
1.71.76990.252648

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodResolution (High)Resolution (Low)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMADTHROUGHOUT1.724.9427155135597.90.2170.258RANDOM32.3
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]
5.235.23-10.45
RMS Deviations
KeyRefinement Restraint Deviation
c_dihedral_angle_d18.9
c_scangle_it6.7
c_scbond_it4.78
c_mcangle_it3.22
c_mcbond_it2.52
c_angle_deg1.7
c_improper_angle_d1.23
c_bond_d0.017
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms1819
Nucleic Acid Atoms
Solvent Atoms255
Heterogen Atoms4

Software

Software
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
SOLVEphasing
DMphasing
CNSrefinement
PDB_EXTRACTdata extraction