1LK2

1.35A crystal structure of H-2Kb complexed with the GNYSFYAL peptide

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6.5	291	K/Na-Phosphate, MPD, pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 291K

Crystal Properties
Matthews coefficient	Solvent content
3.02	59.33

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 135.549	α = 90
b = 87.65	β = 90
c = 45.118	γ = 90

Symmetry
Space Group	P 21 21 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	IMAGE PLATE	MARRESEARCH	Flat mirror (vertical focusing)	2000-02-13	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL9-1	0.970	SSRL	BL9-1

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	1.35	30	98.9	0.053	23.95	3.4		117515			16.5

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.35	1.37	95.3		0.813	1.13	2.5	5606

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	1.35	18.35	109986	104434	5552	93.64	0.15023	0.14949	0.1639	RANDOM	9.96

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]
-0.26			0.44		-0.18

RMS Deviations
Key	Refinement Restraint Deviation
r_sphericity_free	20.989
r_dihedral_angle_2_deg	16.934
r_dihedral_angle_1_deg	5.638
r_scangle_it	4.043
r_sphericity_bonded	3.587
r_scbond_it	2.755
r_mcangle_it	1.691
r_angle_refined_deg	1.608
r_angle_other_deg	1.19
r_rigid_bond_restr	1.163
r_mcbond_it	1.124
r_nbtor_other	0.566
r_symmetry_hbond_refined	0.222
r_nbd_refined	0.218
r_nbd_other	0.201
r_symmetry_vdw_other	0.196
r_symmetry_vdw_refined	0.176
r_xyhbond_nbd_refined	0.17
r_chiral_restr	0.166
r_symmetry_hbond_other	0.128
r_bond_refined_d	0.013
r_gen_planes_refined	0.007
r_gen_planes_other	0.002
r_bond_other_d	0.001
r_xyhbond_nbd_other

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3119
Nucleic Acid Atoms
Solvent Atoms	387
Heterogen Atoms	67

Software

Software
Software Name	Purpose
REFMAC	refinement
SCALEPACK	data scaling
CNS	refinement
DENZO	data reduction
CNS	phasing