4MR8

Crystal structure of the extracellular domain of human GABA(B) receptor bound to the antagonist CGP35348


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 4MQEPDB ENTRY 4MQE

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, HANGING DROP727710% PEG3350, 20% glycerol, 0.12 M sodium acetate, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 277K
Crystal Properties
Matthews coefficientSolvent content
3.0159.12

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 70.98α = 90
b = 112.75β = 97.8
c = 73.45γ = 90
Symmetry
Space GroupP 1 21 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCDADSC QUANTUM 3152011-08-16MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONAPS BEAMLINE 24-ID-C0.97949APS24-ID-C

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Merge I (Observed)R Sym 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
12.15112.74999.20.0370.03718.63.7616846168448.23
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)R Merge I (Observed)R-Sym I (Observed)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
12.152.27970.4620.4621.63.28759

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodStarting modelResolution (High)Resolution (Low)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 DIFFRACTIONMOLECULAR REPLACEMENTTHROUGHOUTPDB ENTRY 4MQE2.1559.676165461654308199.090.20980.20980.20910.2227RANDOM53.2603
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]
3.21863.3894-11.23668.018
RMS Deviations
KeyRefinement Restraint Deviation
t_dihedral_angle_d18.44
t_torsion_other18.44
t_omega_torsion2.53
t_angle_deg1.04
t_it0.944
t_gen_planes0.013
t_bond_d0.009
t_trig_c_planes0.006
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms6485
Nucleic Acid Atoms
Solvent Atoms474
Heterogen Atoms126

Software

Software
Software NamePurpose
SCALAdata scaling
BUSTER-TNTrefinement
PDB_EXTRACTdata extraction
XDSdata scaling
XDSdata reduction
PHASERphasing
BUSTERrefinement