2BEZ

Structure of a proteolitically resistant core from the severe acute respiratory syndrome coronavirus S2 fusion protein

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		7.5		0.1M TRIS-HCL, PH 7.0, 1.8M AMMONIUM SULPHATE, 0.1M NACL

Crystal Properties
Matthews coefficient	Solvent content
2.43	40

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 37.345	α = 90
b = 37.345	β = 90
c = 469.823	γ = 120

Symmetry
Space Group	H 3 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	CCD	ADSC CCD		2004-02-07	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID14-1		ESRF	ID14-1

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	1.6	30	99.5	0.08		10.6		16726		-2

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	1.6	1.66	97.9		0.5		7.8

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	SIRAS	THROUGHOUT	1.6	20	16713	868	99.5	0.208	0.206	0.244	RANDOM	33.65

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]
1.03	0.51		1.03		-1.54

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	5.232
r_scangle_it	5.154
r_scbond_it	3.243
r_mcangle_it	2.114
r_angle_refined_deg	1.589
r_mcbond_it	1.195
r_angle_other_deg	0.915
r_nbd_refined	0.502
r_symmetry_hbond_refined	0.416
r_symmetry_vdw_other	0.264
r_symmetry_vdw_refined	0.263
r_nbd_other	0.244
r_xyhbond_nbd_refined	0.229
r_chiral_restr	0.106
r_nbtor_other	0.091
r_bond_refined_d	0.018
r_gen_planes_refined	0.006
r_bond_other_d	0.002
r_gen_planes_other	0.001
r_dihedral_angle_2_deg
r_dihedral_angle_3_deg
r_dihedral_angle_4_deg
r_nbtor_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_mcangle_other
r_scbond_other
r_scangle_other
r_long_range_B_refined
r_long_range_B_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	849
Nucleic Acid Atoms
Solvent Atoms	78
Heterogen Atoms	6

Software

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