8CRK

Crystal structure of N-terminal SARS-CoV-2 nsp1 in complex with fragment hit 7H2 refined against anomalous diffraction data

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	8A55

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP		291.15	0.1 M BIS-TRIS pH 6.5, 0.2 M NaCl and 25%w/v Polyethylene glycol 3,350

Crystal Properties
Matthews coefficient	Solvent content
1.81	31.9

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 36.524	α = 90
b = 36.524	β = 90
c = 141.988	γ = 90

Symmetry
Space Group	P 43 21 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	PIXEL	DECTRIS PILATUS3 2M		2021-07-09	M	SINGLE WAVELENGTH
2	1	x-ray	45	PIXEL	DECTRIS PILATUS 12M		2023-02-01	M	SINGLE WAVELENGTH
3	1	x-ray	45	PIXEL	DECTRIS PILATUS 12M		2023-02-01	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE MASSIF-1	0.96546	ESRF	MASSIF-1
2	SYNCHROTRON	DIAMOND BEAMLINE I23	2.75	Diamond	I23
3	SYNCHROTRON	DIAMOND BEAMLINE I23	4.5	Diamond	I23

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	CC (Half)	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	1.04	36.52	96.9	1	10.18	5.65		85622

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.04	1.1			0.17

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	1.1	35.5	1.35	40247	988	99.88	0.167	0.1675	0.1918

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]

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	6.152
f_angle_d	1.396
f_chiral_restr	0.09
f_bond_d	0.012
f_plane_restr	0.01

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	892
Nucleic Acid Atoms
Solvent Atoms	112
Heterogen Atoms	10

Software

Software
Software Name	Purpose
PHENIX	refinement
xia2	data reduction
xia2	data scaling
autoPROC	data processing

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.