2C7U

Conflicting selective forces affect CD8 T-cell receptor contact sites in an HLA-A2 immunodominant HIV epitope.

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6.5		pH 6.50

Crystal Properties
Matthews coefficient	Solvent content
2.7	54.37

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 63.163	α = 90
b = 93.854	β = 89.99
c = 81.497	γ = 90

Symmetry
Space Group	P 1 21 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	CCD	ADSC CCD		2003-10-23	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SRS BEAMLINE PX14.2		SRS	PX14.2

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge 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
1	2.4	20	96.8	0.07		3.7		138420		0.9

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	OTHER	THROUGHOUT	2.38	81.38	35178	1851	97	0.251	0.248	0.314	RANDOM	55.48

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]
-2.6		0.34	1.58		1.02

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.353
r_dihedral_angle_4_deg	19.197
r_dihedral_angle_3_deg	17.935
r_dihedral_angle_1_deg	6.385
r_scangle_it	1.705
r_angle_refined_deg	1.28
r_scbond_it	1.121
r_mcangle_it	0.799
r_mcbond_it	0.462
r_nbtor_refined	0.292
r_nbd_refined	0.211
r_xyhbond_nbd_refined	0.194
r_symmetry_vdw_refined	0.178
r_symmetry_hbond_refined	0.156
r_chiral_restr	0.083
r_bond_refined_d	0.013
r_gen_planes_refined	0.004
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_other
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_mcangle_other
r_scbond_other
r_scangle_other
r_long_range_B_refined
r_long_range_B_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6300
Nucleic Acid Atoms
Solvent Atoms	219
Heterogen Atoms

Software

Software
Software Name	Purpose
REFMAC	refinement