3MJ5

Severe Acute Respiratory Syndrome-Coronavirus Papain-Like Protease Inhibitors: Design, Synthesis, Protein-Ligand X-ray Structure and Biological Evaluation

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2FE8	PDB entry 2FE8

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6.5	298	Diffraction-quality crystals grew from a sitting drop containing 5 mg/mL PLpro, 1 mM inhibitor, 1 M (NH4)2SO4, 50 mM MES, pH 6.5, and 2.5% PEG 400., VAPOR DIFFUSION, SITTING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.92	57.82

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 118.397	α = 90
b = 74.129	β = 103.02
c = 96.895	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	MARMOSAIC 225 mm CCD		2009-02-16	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 22-BM	1.000	APS	22-BM

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	2.65	50	97.5	0.127	11.6	3.37	24417	23605		2	61.6

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)
	2.65	2.74	85.1		0.419	2.18	2.6	2025

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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	MOLECULAR REPLACEMENT	THROUGHOUT	PDB entry 2FE8	2.63	94.42	22215	1184	95.83	0.21061	0.2085	0.24816	RANDOM	49.977

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]
2.21		-6.32	10.74		-12.95

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	39.131
r_dihedral_angle_3_deg	17.141
r_dihedral_angle_4_deg	16.355
r_dihedral_angle_1_deg	5.745
r_scangle_it	3.03
r_scbond_it	1.803
r_angle_refined_deg	1.406
r_mcangle_it	1.361
r_mcbond_it	0.714
r_chiral_restr	0.082

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	39.131
r_dihedral_angle_3_deg	17.141
r_dihedral_angle_4_deg	16.355
r_dihedral_angle_1_deg	5.745
r_scangle_it	3.03
r_scbond_it	1.803
r_angle_refined_deg	1.406
r_mcangle_it	1.361
r_mcbond_it	0.714
r_chiral_restr	0.082
r_bond_refined_d	0.012
r_gen_planes_refined	0.006

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4523
Nucleic Acid Atoms
Solvent Atoms	119
Heterogen Atoms	64

Software

Software
Software Name	Purpose
HKL-2000	data collection
PHASER	phasing
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.