4QOK

Structural basis for ineffective T-cell responses to MHC anchor residue improved heteroclitic peptides

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3HG1

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6.5	291	0.1 M Sodium Cacodylate, pH 6.5, 15% PEG 4000, 15% Glycerol, VAPOR DIFFUSION, SITTING DROP, temperature 291K

Crystal Properties
Matthews coefficient	Solvent content
3.2	61.55

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 120.69	α = 90
b = 120.69	β = 90
c = 82.06	γ = 90

Symmetry
Space Group	P 43

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	PSI PILATUS 6M	Mirrors	2011-05-28	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	DIAMOND BEAMLINE I24	0.9778	Diamond	I24

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Sym 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	3	41.03	99.9	0.122	12.8	7.5	23795	23795		2

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	3	3.08	99.9		0.82	0.82	0.9	7.9	1726

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 (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	3HG1	3	40.23	23775	23775	1219	99.9	0.206	0.2062	0.2032	0.2616	RANDOM	56.256

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]
0.84			0.84		-1.69

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	21.831
r_dihedral_angle_4_deg	11.082
r_dihedral_angle_3_deg	10.366
r_dihedral_angle_1_deg	4.216
r_angle_refined_deg	1.452
r_angle_other_deg	0.879
r_chiral_restr	0.077
r_bond_refined_d	0.013
r_gen_planes_refined	0.007
r_bond_other_d	0.006

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	21.831
r_dihedral_angle_4_deg	11.082
r_dihedral_angle_3_deg	10.366
r_dihedral_angle_1_deg	4.216
r_angle_refined_deg	1.452
r_angle_other_deg	0.879
r_chiral_restr	0.077
r_bond_refined_d	0.013
r_gen_planes_refined	0.007
r_bond_other_d	0.006
r_gen_planes_other	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6580
Nucleic Acid Atoms
Solvent Atoms	21
Heterogen Atoms	16

Software

Software
Software Name	Purpose
SCALA	data scaling
PHASER	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
GDA	data collection

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.