3MRQ

Crystal Structure of MHC class I HLA-A2 molecule complexed with Melan-A MART1 decapeptide variant

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.5	293	17% PEG 6000, 0.1M NaCitrate, 0.1M NaCl, 2.61mg/ml protein conc., pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.87	57.19

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 60.874	α = 90
b = 80.044	β = 90
c = 110.571	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 315r		2007-05-04	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID23-1	0.9500	ESRF	ID23-1

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	2.2	50	100	0.129	12.17	7.12		28175		-3	28.072

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	2.2	2.28	100		0.449	4.5

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 3MRP	2.2	14.84	28009	2801	100	0.193	0.192	0.235	RANDOM	31.322

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]

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	31.627
r_dihedral_angle_4_deg	19.761
r_dihedral_angle_3_deg	15.598
r_dihedral_angle_1_deg	6.131
r_scangle_it	2.687
r_scbond_it	1.715
r_angle_refined_deg	1.219
r_mcangle_it	1.118
r_mcbond_it	0.703
r_nbtor_refined	0.296

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	31.627
r_dihedral_angle_4_deg	19.761
r_dihedral_angle_3_deg	15.598
r_dihedral_angle_1_deg	6.131
r_scangle_it	2.687
r_scbond_it	1.715
r_angle_refined_deg	1.219
r_mcangle_it	1.118
r_mcbond_it	0.703
r_nbtor_refined	0.296
r_nbd_refined	0.189
r_symmetry_vdw_refined	0.147
r_symmetry_hbond_refined	0.136
r_xyhbond_nbd_refined	0.124
r_chiral_restr	0.087
r_bond_refined_d	0.01
r_gen_planes_refined	0.004

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3145
Nucleic Acid Atoms
Solvent Atoms	117
Heterogen Atoms

Software

Software
Software Name	Purpose
XSCALE	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
XDS	data reduction
AMoRE	phasing

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.