2QTO

An anisotropic model for potassium channel KcsA


X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
17.5200 MM CACL2, 100 MM HEPES PH 7.5, 48% PEG 400
Crystal Properties
Matthew coefficientSolvent content
4.9975.34

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 128.78α = 90
b = 68.93β = 124.63
c = 112.04γ = 90
Symmetry
Space GroupC 1 2 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100 MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONCHESS BEAMLINE A10.908CHESSA1

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (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
13.2013093.36.1126032

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodStarting modelResolution (High)Resolution (Low)Cut-off Sigma (F)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMIRTHROUGHOUT1BL83.2019.9941091212651000.271640.271620.27181RANDOM121.433
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]
-1.06-1.640.68-1.49
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg47.921
r_dihedral_angle_3_deg20.4
r_dihedral_angle_4_deg8.627
r_dihedral_angle_1_deg5.493
r_angle_refined_deg0.989
r_symmetry_vdw_refined0.469
r_nbtor_refined0.31
r_nbd_refined0.285
r_xyhbond_nbd_refined0.173
r_metal_ion_refined0.108
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg47.921
r_dihedral_angle_3_deg20.4
r_dihedral_angle_4_deg8.627
r_dihedral_angle_1_deg5.493
r_angle_refined_deg0.989
r_symmetry_vdw_refined0.469
r_nbtor_refined0.31
r_nbd_refined0.285
r_xyhbond_nbd_refined0.173
r_metal_ion_refined0.108
r_chiral_restr0.057
r_bond_refined_d0.007
r_gen_planes_refined0.003
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms2849
Nucleic Acid Atoms
Solvent Atoms1
Heterogen Atoms3

Software

Software
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
SHELXSphasing