6TDQ

Crystal structure of the disulfide engineered HLA-A0201 molecule in complex with one GM dipeptide in the A pocket and one GM dipeptide in the F pocket.

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	6Q3K

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP		298	0.1 M HEPES pH 7.5, 20% PEG 10 000, 8% ethylene glycol

Crystal Properties
Matthews coefficient	Solvent content
2.34	47.32

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 58.643	α = 90
b = 84.124	β = 90
c = 83.716	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	PIXEL	DECTRIS PILATUS3 6M		2018-12-12	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	EMBL/DESY, HAMBURG BEAMLINE X13	0.987	EMBL/DESY, HAMBURG	X13

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	CC (Half)	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	1.6	84	96.9	0.069	1	9.7	3.4		103544

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.6	1.641			0.62	0.49

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	6Q3K	1.6	83.72	98243	5274	96.66	0.1713	0.169	0.2139	RANDOM	24.315

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]
-10.92		-1.2	22.02		-11.1

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	29.87
r_dihedral_angle_4_deg	16.244
r_dihedral_angle_3_deg	14.599
r_dihedral_angle_1_deg	6.926
r_angle_refined_deg	1.658
r_angle_other_deg	1.022
r_chiral_restr	0.094
r_bond_refined_d	0.013
r_gen_planes_refined	0.01
r_bond_other_d	0.001

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	29.87
r_dihedral_angle_4_deg	16.244
r_dihedral_angle_3_deg	14.599
r_dihedral_angle_1_deg	6.926
r_angle_refined_deg	1.658
r_angle_other_deg	1.022
r_chiral_restr	0.094
r_bond_refined_d	0.013
r_gen_planes_refined	0.01
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6212
Nucleic Acid Atoms
Solvent Atoms	1173
Heterogen Atoms	89

Software

Software
Software Name	Purpose
REFMAC	refinement
PDB_EXTRACT	data extraction
XDS	data reduction
Aimless	data scaling
MOLREP	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 R01GM157729.