2HP4

Computational design and crystal structure of an enhanced affinity mutant human CD8-alpha-alpha co-receptor

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION	6.5	291	25.5% PEG 8000, 0.085M Sodium Cacodylate, 0.17M Ammonium Sulphate, 15% Glycerol, 3% Ethylene Glycol, pH 6.50, VAPOR DIFFUSION, temperature 291K

Crystal Properties
Matthews coefficient	Solvent content
3.12	60.58

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 99.723	α = 90
b = 99.723	β = 90
c = 55.806	γ = 120

Symmetry
Space Group	P 64

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 QUANTUM 4		2003-10-21	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	2.1	29.185	98.5	0.149	8.95	4.17		19090

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.1	2.21	94.84		0.62	2.04	3.27

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	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	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 1CD8	2.1	29.185	18374	17444	930	98.54	0.18464	0.18217	0.23316	RANDOM	22.827

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]
-0.11	-0.05		-0.11		0.16

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	22.15
r_dihedral_angle_4_deg	12.471
r_dihedral_angle_3_deg	8.331
r_scangle_it	5.333
r_scbond_it	4.078
r_mcangle_it	2.962
r_mcbond_it	2.461
r_dihedral_angle_1_deg	2.077
r_angle_refined_deg	1.253
r_angle_other_deg	0.722
r_mcbond_other	0.584
r_symmetry_vdw_other	0.306
r_symmetry_hbond_refined	0.245
r_nbd_other	0.216
r_xyhbond_nbd_refined	0.214
r_xyhbond_nbd_other	0.208
r_nbd_refined	0.205
r_nbtor_refined	0.189
r_symmetry_vdw_refined	0.179
r_nbtor_other	0.092
r_chiral_restr	0.087
r_bond_refined_d	0.015
r_bond_other_d	0.003
r_gen_planes_refined	0.003
r_gen_planes_other	0.001
r_metal_ion_refined
r_metal_ion_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1816
Nucleic Acid Atoms
Solvent Atoms	282
Heterogen Atoms	49

Software

Software
Software Name	Purpose
SCALA	data scaling
MOLREP	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
MOSFLM	data reduction
CCP4	data scaling