3QB2

The Crystal Structure of Immunity Factor for SPN (IFS)

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8	293	1.6-2.0 ammonium sulfate, pH 8.0, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.77	55.58

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 108.032	α = 90
b = 108.032	β = 90
c = 147.047	γ = 120

Symmetry
Space Group	P 31 2 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	CCD	NOIR-1	Rosenbaum-Rock Si(111) sagitally focused monochromator	2005-06-01	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 4.2.2	0.97901, 0.97932, 0.99504	ALS	4.2.2

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	2.5	46.8	100	0.069		8.24		34514	2	2

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 (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MAD	THROUGHOUT	2.5	46.78	66456	32775	1739	98.83	0.26042	0.26042	0.25875	0.28986	RANDOM	35.886

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]
0.03	0.01		0.03		-0.04

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.238
r_dihedral_angle_4_deg	26.066
r_dihedral_angle_3_deg	18.2
r_dihedral_angle_1_deg	5.065
r_scangle_it	2.673
r_scbond_it	1.69
r_angle_refined_deg	1.101
r_mcangle_it	1.031
r_angle_other_deg	0.873
r_mcbond_it	0.525
r_mcbond_other	0.074
r_chiral_restr	0.066
r_bond_refined_d	0.009
r_gen_planes_refined	0.004
r_bond_other_d	0.001
r_gen_planes_other	0.001
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4900
Nucleic Acid Atoms
Solvent Atoms	155
Heterogen Atoms	30

Software

Software
Software Name	Purpose
Blu-Ice	data collection
SHARP	phasing
REFMAC	refinement
d*TREK	data reduction
d*TREK	data scaling