2X4N

Crystal structure of MHC CLass I HLA-A2.1 bound to residual fragments of a photocleavable peptide that is cleaved upon UV-light treatment


X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
16.5100 MM MES PH 5.5, 20% PEG 1500. CRYSTALS WERE FROZEN IN 100 MM MES, 30% PEG 1500, 10% GLYCEROL
Crystal Properties
Matthews coefficientSolvent content
2.449

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 62.509α = 90
b = 86.523β = 90.34
c = 80.003γ = 90
Symmetry
Space GroupP 1 21 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCDADSC CCDMIRRORS2007-09-06MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONESRF BEAMLINE ID23-1ESRFID23-1

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
12.3480.0692.40.069.021.8833198-3.743.7
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)
12.342.4792.70.312.471.82

Refinement

Statistics
Diffraction IDStructure Solution MethodStarting modelResolution (High)Resolution (Low)Cut-off Sigma (F)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-WorkR-FreeMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTPDB ENTRY 1EEY2.3419.8061.3733140201392.060.20040.19570.273950.18
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]
-1.62631.12345.0402-3.4139
RMS Deviations
KeyRefinement Restraint Deviation
f_dihedral_angle_d19.658
f_angle_d1.317
f_chiral_restr0.129
f_bond_d0.008
f_plane_restr0.004
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms6243
Nucleic Acid Atoms
Solvent Atoms235
Heterogen Atoms84

Software

Software
Software NamePurpose
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling
AMoREphasing