2BEQ

Structure of a Proteolytically 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		6.5		30% PEG8K, PH 7.0 100MM SODIUM CACODYLATE PH 6.5, 200MM SODIUM ACETATE

Crystal Properties
Matthews coefficient	Solvent content
2.1	35

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 99.907	α = 90
b = 42.903	β = 116.69
c = 59.826	γ = 90

Symmetry
Space Group	C 1 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	ADSC CCD		2004-02-02	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	99.6	0.04	15	3.5		28450

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	93.5		0.4	3	3.1

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	30	28450	1521	99.7	0.201	0.199	0.241	RANDOM	29.25

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]
-1.76		1.39	1.53		1.49

RMS Deviations
Key	Refinement Restraint Deviation
r_scangle_it	5.586
r_dihedral_angle_1_deg	5.265
r_scbond_it	3.204
r_mcangle_it	2.024
r_angle_refined_deg	1.606
r_angle_other_deg	1.503
r_mcbond_it	1.06
r_nbd_refined	0.293
r_nbd_other	0.244
r_symmetry_vdw_refined	0.24
r_symmetry_vdw_other	0.232
r_xyhbond_nbd_refined	0.212
r_symmetry_hbond_refined	0.159
r_chiral_restr	0.095
r_nbtor_other	0.088
r_bond_refined_d	0.017
r_gen_planes_refined	0.006
r_bond_other_d	0.003
r_gen_planes_other	0.002
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	1904
Nucleic Acid Atoms
Solvent Atoms	202
Heterogen Atoms

Software

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