2JK5

Potassium Channel KcsA in complex with Tetrabutylammonium in high K


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 1K4CPDB ENTRY 1K4C WITH SELECTIVITY FILTER AND IONS REMOVED

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
15.418-25%PEG400, 50 MM SODIUM ACETATE, 50 MM MAGNESIUM ACETATE, pH 5.4
Crystal Properties
Matthews coefficientSolvent content
3.7166.8

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 156.145α = 90
b = 156.145β = 90
c = 76.326γ = 90
Symmetry
Space GroupI 4

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCDMARRESEARCH2007-11-19MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONAPS BEAMLINE 22-IDAPS22-ID

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
12.45099.50.0715.273.7535756-3
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)
12.42.5498.90.443.53.75

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 1K4C WITH SELECTIVITY FILTER AND IONS REMOVED2.43033912179099.50.2050.2020.249RANDOM44.2
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]
1.081.08-2.17
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg35.403
r_dihedral_angle_4_deg21.808
r_dihedral_angle_3_deg15.385
r_dihedral_angle_1_deg6.007
r_scangle_it2.442
r_scbond_it1.476
r_angle_refined_deg1.291
r_mcangle_it1.175
r_mcbond_it0.638
r_chiral_restr0.085
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg35.403
r_dihedral_angle_4_deg21.808
r_dihedral_angle_3_deg15.385
r_dihedral_angle_1_deg6.007
r_scangle_it2.442
r_scbond_it1.476
r_angle_refined_deg1.291
r_mcangle_it1.175
r_mcbond_it0.638
r_chiral_restr0.085
r_bond_refined_d0.011
r_gen_planes_refined0.005
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_mcangle_other
r_scbond_other
r_scangle_other
r_long_range_B_refined
r_long_range_B_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms4050
Nucleic Acid Atoms
Solvent Atoms204
Heterogen Atoms70

Software

Software
Software NamePurpose
REFMACrefinement
XDSdata reduction
XSCALEdata scaling
PHASERphasing