3G60

Structure of P-glycoprotein Reveals a Molecular Basis for Poly-Specific Drug Binding


X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
Method Vapor Diffusion Sitting Drop
pH 7.8
Temperature 278.0
Details 20-23% PEG400, 0.05M TRIS, 0.04% sodium cholate, pH 7.8, VAPOR DIFFUSION, SITTING DROP, temperature 278K

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 96.63 α = 90
b = 115.09 β = 90
c = 374.2 γ = 90
Symmetry
Space Group P 21 21 21

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 100
Diffraction Detector
Detector Diffraction Type Details Collection Date
CCD MARRESEARCH -- 2008-04-20
Diffraction Radiation
Monochromator Protocol
-- SINGLE WAVELENGTH
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
SYNCHROTRON APS BEAMLINE 23-ID-D 0.97942 APS 23-ID-D

Data Collection

Overall
Resolution (High) Resolution (Low) Percent Possible (Observed) R Merge I (Observed) R Sym I (Observed) Net I Over Average Sigma (I) Redundancy Number Reflections (All) Number Reflections (Observed) Observed Criterion Sigma (F) Observed Criterion Sigma (I) B (Isotropic) From Wilson Plot
4.4 20 94.7 -- 0.073 -- -- 27007 25576 0.0 0.0 121.9
High Resolution Shell
Resolution (High) Resolution (Low) Percent Possible (All) R Merge I (Observed) R-Sym I (Observed) Mean I Over Sigma (Observed) Redundancy Number Unique Reflections (All)
4.4 4.67 90.1 -- -- -- -- --

Refinement

Statistics
Structure Solution Method Refinement High Resolution Refinement Low Resolution Cut-off Sigma (I) Cut-off Sigma (F) Number of Reflections (All) Number of Reflections (Observed) Number of Reflections (R-Free) Percent Reflections (Observed) R-Factor (All) R-Factor (Observed) R-Work R-Free R-Free Selection Details
MOLECULAR REPLACEMENT 4.4 19.99 -- 0.0 27007 25576 2562 94.7 0.314 0.314 0.314 0.365 RANDOM
High Resolution Shell
Refinement method Shell Resolution (High) Shell Resolution (Low) # of Reflections (Observed) # of Reflections (R-Free) # of Reflections (R-Work) R-Factor (R-Work) R-Factor (R-Free) R-Factor (R-Free Error) Percent Reflections (Observed)
X Ray Diffraction 4.4 4.67 -- 402 3554 0.421 0.472 0.024 90.1
Temperature Factor Modeling
Temperature Factor Value
Isotropic Thermal Model RESTRAINED
Mean Isotropic B 198.8
Anisotropic B[1][1] -14.79
Anisotropic B[1][2] 0.0
Anisotropic B[1][3] 0.0
Anisotropic B[2][2] 50.27
Anisotropic B[2][3] 0.0
Anisotropic B[3][3] -35.48
RMS Deviations
Key Refinement Restraint Deviation
c_angle_deg 1.5
c_mcangle_it 31.79
c_scbond_it 20.79
c_mcbond_it 20.52
c_improper_angle_d 0.89
c_dihedral_angle_d 18.4
c_bond_d 0.008
c_scangle_it 30.53
Coordinate Error
Parameter Value
Luzzati ESD (Observed) 0.92
Luzzati Sigma A (Observed) 0.76
Luzzati Resolution Cutoff (Low) 20.0
Luzzati ESD (R-Free Set) 1.23
Luzzati Sigma A (R-Free Set) 1.2
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 18342
Nucleic Acid Atoms 0
Heterogen Atoms 72
Solvent Atoms 0

Software

Software
Software Name Purpose
HKL-2000 data collection
CNS refinement
HKL-2000 data reduction
HKL-2000 data scaling
CNS phasing