3REW

Crystal structure of an lmp2a-derived peptide bound to human class i mhc hla-a2

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP		298	22% PEG 3350, 0.2M AMMONIUM IODIDE, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 298K

Crystal Properties
Matthews coefficient	Solvent content
2.8	56.07

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 49.75	α = 90
b = 141.44	β = 90
c = 141.67	γ = 90

Symmetry
Space Group	P 21 21 21

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		2005-08-29	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID29		ESRF	ID29

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	1.9	100	99.8	0.095	5.803	4.4		79598

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	1.9	2			0.485	1.5	4.2

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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	MOLECULAR REPLACEMENT	THROUGHOUT	pdb entry 1BD2	1.9	39.11	79533	4014	99.7	0.209	0.208	0.239	RANDOM	22.06

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]
-0.75			-0.22		0.97

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.585
r_dihedral_angle_4_deg	17.415
r_dihedral_angle_3_deg	11.934
r_dihedral_angle_1_deg	4.996
r_scangle_it	3.957
r_scbond_it	2.523
r_mcangle_it	1.76
r_angle_refined_deg	1.337
r_mcbond_it	1.055
r_symmetry_hbond_refined	0.322
r_nbtor_refined	0.301
r_symmetry_vdw_refined	0.275
r_nbd_refined	0.218
r_xyhbond_nbd_refined	0.128
r_chiral_restr	0.099
r_bond_refined_d	0.014
r_gen_planes_refined	0.006
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_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6212
Nucleic Acid Atoms
Solvent Atoms	440
Heterogen Atoms	21

Software

Software
Software Name	Purpose
REFMAC	refinement
CNS	refinement
CrystalClear	data collection
MOSFLM	data reduction
SCALA	data scaling
CNS	phasing