3OSK

Crystal structure of human CTLA-4 apo homodimer


X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, SITTING DROP5.529525% Polyethylene glycol 3350 (w/v), 100mM bis-Tris pH 5.5, 200mM ammonium acetate, VAPOR DIFFUSION, SITTING DROP, temperature 295K
Crystal Properties
Matthews coefficientSolvent content
2.0840.75

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 43.864α = 90
b = 51.457β = 90
c = 102.849γ = 90
Symmetry
Space GroupP 21 21 21

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCDADSC QUANTUM 315r2007-10-11MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONDIAMOND BEAMLINE I040.98DiamondI04

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
11.830990.11110.33222222222122

Refinement

Statistics
Diffraction IDStructure Solution MethodStarting modelResolution (High)Resolution (Low)Cut-off Sigma (F)Number Reflections (All)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-WorkR-FreeMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTPDB ENTRY 1i8l, chain C1.827.0122.032222222221113399.780.20320.19950.2751
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]
-1.1379-0.92212.06
RMS Deviations
KeyRefinement Restraint Deviation
f_dihedral_angle_d15.761
f_angle_d1.223
f_chiral_restr0.075
f_bond_d0.01
f_plane_restr0.005
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms1822
Nucleic Acid Atoms
Solvent Atoms228
Heterogen Atoms40

Software

Software
Software NamePurpose
HKL-3000data collection
PHASERphasing
PHENIXrefinement
DENZOdata reduction
SCALEPACKdata scaling