3AW1

Structure of SARS 3CL protease auto-proteolysis resistant mutant in the absent of inhibitor

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2ZU5

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6	277	9-11%(w/v) PEG20000, 100mM MES pH 6.0, 5mM DTT , VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
3.23	61.87

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 52.13	α = 71.23
b = 67.454	β = 77.46
c = 67.384	γ = 81.74

Symmetry
Space Group	P 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	95	CCD	ADSC QUANTUM 315r		2009-03-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	PHOTON FACTORY BEAMLINE BL-5A	1.000	Photon Factory	BL-5A

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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	30	97.2	0.038	0.038	24.3	3.8	55659	55659		-3

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2	2.03	95.8		0.175	0.175	6.1	3.8

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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	2ZU5	2	29.95	55659	51940	2779	95.23	0.22572	0.22371	0.26266	RANDOM	37.774

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]
-0.21	0.13	0.11	-0.06	0.11	0.1

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.615
r_dihedral_angle_4_deg	17.9
r_dihedral_angle_3_deg	16.89
r_dihedral_angle_1_deg	7.164
r_scangle_it	4.865
r_scbond_it	3.327
r_mcangle_it	2.198
r_angle_refined_deg	2.007
r_mcbond_it	1.272
r_chiral_restr	0.164
r_bond_refined_d	0.023
r_gen_planes_refined	0.011
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
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_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4652
Nucleic Acid Atoms
Solvent Atoms	140
Heterogen Atoms

Software

Software
Software Name	Purpose
HKL-2000	data collection
MOLREP	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling