3SYQ

Crystal structure of the G protein-gated inward rectifier K+ channel GIRK2 (Kir3.2) R201A mutant in complex with PIP2


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 2E4FPDB ENTRY 2E4F

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, HANGING DROP7.25293.1550 mM HEPES sodium, pH 7.25, 0.5 M sodium chloride, 25% PEG400, VAPOR DIFFUSION, HANGING DROP, temperature 293.15K
Crystal Properties
Matthews coefficientSolvent content
3.4464.22

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 87.605α = 90
b = 208.491β = 90
c = 117.376γ = 90
Symmetry
Space GroupC 2 2 21

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCDMARMOSAIC 300 mm CCD2011-04-24MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONAPS BEAMLINE 23-ID-B1.034APS23-ID-B

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
13.43249.391000.0639.17.914690
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
13.453.571007.41461

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 2E4F3.4449.391181457580.490.30060.29950.3227RANDOM138.3704
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]
-0.1-0.090.18
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg36.317
r_dihedral_angle_4_deg18.003
r_dihedral_angle_3_deg17.508
r_dihedral_angle_1_deg5.281
r_angle_refined_deg1.019
r_scangle_it0.82
r_mcangle_it0.477
r_scbond_it0.452
r_mcbond_it0.257
r_chiral_restr0.066
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg36.317
r_dihedral_angle_4_deg18.003
r_dihedral_angle_3_deg17.508
r_dihedral_angle_1_deg5.281
r_angle_refined_deg1.019
r_scangle_it0.82
r_mcangle_it0.477
r_scbond_it0.452
r_mcbond_it0.257
r_chiral_restr0.066
r_bond_refined_d0.007
r_gen_planes_refined0.004
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms4490
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms35

Software

Software
Software NamePurpose
SCALEPACKdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction
Blu-Icedata collection
DENZOdata reduction
MOLREPphasing