1EN2

UDA TETRASACCHARIDE COMPLEX. CRYSTAL STRUCTURE OF URTICA DIOICA AGGLUTININ, A SUPERANTIGEN PRESENTED BY MHC MOLECULES OF CLASS I AND CLASS II

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6	290	PEG 6000, sodium acetate, sodium chloride, pH 6.0, VAPOR DIFFUSION, SITTING DROP, temperature 290.0K

Crystal Properties
Matthews coefficient	Solvent content
2.13	42.25

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 31.82	α = 90
b = 39.6	β = 90
c = 63.64	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	298	IMAGE PLATE	MARRESEARCH		1999-07-06	M	SINGLE WAVELENGTH
2	1	298	IMAGE PLATE	MARRESEARCH		1999-07-16

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	LURE BEAMLINE D41A		LURE	D41A
2	SYNCHROTRON	LURE BEAMLINE DW32		LURE	DW32

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	1.4	25	96.5	0.049	25.5	9.4	15524	15524			22.3

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	1.4	1.45	94.2		0.328		7.3	1473

Refinement

Statistics
Diffraction ID	Structure Solution 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	1EIS	1.4	25	15499	15499	766	96.2	0.198	0.198	0.189	0.203	RANDOM

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
p_transverse_tor	27.8
p_staggered_tor	16.7
p_planar_tor	4.9
p_scangle_it	3.555
p_scbond_it	2.387
p_mcangle_it	2.291
p_mcbond_it	1.466
p_multtor_nbd	0.21
p_singtor_nbd	0.152
p_chiral_restr	0.132
p_planar_d	0.017
p_angle_d	0.015
p_bond_d	0.014
p_hb_or_metal_coord
p_plane_restr
p_xhyhbond_nbd
p_xyhbond_nbd
p_special_tor
p_orthonormal_tor

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	660
Nucleic Acid Atoms
Solvent Atoms	76
Heterogen Atoms	56

Software

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