1M5U

CRYSTAL STRUCTURE OF THE RESPONSE REGULATOR DIVK. STRUCTURE AT PH 8.0 IN THE APO-FORM


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelOtherAPO-DIVK SOLVED AT PH6

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, HANGING OR SITTING-DROP8285MES 50mM PH6.0,PEG MME 550 32% At 285K. The Protein was Concentrated At 2 MG/ML In MES-NAOH PH 6.00 (20 mM), DTT (5 mM) And Mixed With An Equal Volume Of The Reservoir Solution Containing PEG MME 550 (32%), MES PH 6.00 (40 mM), DTT (5mM). Crystal Size (300X40X40 microM3) In 20microL Sitting Drops. VAPOR DIFFUSION, HANGING OR SITTING-DROP at 285K. Crystals Were Transferred In Reservoir Solutions Whose Ph Was Increased From 6.0 To 8.0 By Steps Of 0.5 Ph Units (The Soaking Time In Each Solution Was 12 Hours). Crystals Were Frozen In Liquid Propane After Soaking For A Few Seconds In Peg Mme 550 (50%), Tris Ph 8.0 (40 Mm)., pH 8.00
Crystal Properties
Matthews coefficientSolvent content
1.831

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 36.67α = 90
b = 40.71β = 90
c = 66.29γ = 90
Symmetry
Space GroupP 21 21 21

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100IMAGE PLATEMARRESEARCH2000-04-17MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONESRF BEAMLINE BM30A0.980ESRFBM30A

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
11.873597.90.03711.35.18414841416.4
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)
1.871.9794.10.0977.94.45050

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodStarting modelResolution (High)Resolution (Low)Cut-off Sigma (F)Number Reflections (All)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (All)R-Factor (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONFOURIER SYNTHESISTHROUGHOUTAPO-DIVK SOLVED AT PH61.871538414802285493.40.19010.19010.190.206RANDOM22.7
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]
-0.081.45-1.38
RMS Deviations
KeyRefinement Restraint Deviation
c_dihedral_angle_d22.6
c_scangle_it2.41
c_mcangle_it1.78
c_scbond_it1.64
c_angle_deg1.3
c_mcbond_it1.16
c_improper_angle_d0.71
c_bond_d0.005
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms895
Nucleic Acid Atoms
Solvent Atoms64
Heterogen Atoms

Software

Software
Software NamePurpose
CNSrefinement
MOSFLMdata reduction
CCP4data scaling
CNSphasing