7L6T

Crystal Structure of SARS-CoV-2 Nsp16/10 Heterodimer in Complex with (m7GpppA2m)pUpUpApApA (Cap-1), S-Adenosyl-L-homocysteine (SAH) and two Magnesium (Mg) ions.

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	6W4H

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.5	292	Protein: 3.8 mg/ml (nsp10/nsp16 1:1), 0.15M Sodium chloride, 0.01M Tris pH 7.5 , 2mM SAM, 1mM TCEP, 5% Glycerol;Screen: Classics II (B3), 0.5M Magnesium formate, 0.1M HEPES pH 7.5;Soak: 6hours, 0.2mM m7GpppAUUAAA, 5mM SAM, in screen solution;Cryo: 25% Sucrose in screen solution.

Crystal Properties
Matthews coefficient	Solvent content
4.39	72

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 169.351	α = 90
b = 169.351	β = 90
c = 52.629	γ = 120

Symmetry
Space Group	P 31 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	PIXEL	DECTRIS EIGER X 9M	Be	2020-10-05	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 21-ID-D	1.12708	APS	21-ID-D

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	R Sym I (Observed)	Rrim I (All)	Rpim I (All)	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	1.78	30	96.6	0.09	0.09	0.097	0.036	0.996	20.8	6.8		81048		-3	24.4

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Rrim I (All)	Rpim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.78	1.81	84.2		1.156	1.156	1.269	0.513	0.56	2.1	5.8

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	6w4h	1.78	29.33	76229	3950	96.81	0.1418	0.1408	0.1615	RANDOM	33.036

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]
0.75	0.38		0.75		-2.43

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	29.239
r_dihedral_angle_3_deg	8.898
r_dihedral_angle_4_deg	7.69
r_dihedral_angle_1_deg	3.421
r_angle_refined_deg	1.33
r_angle_other_deg	0.379
r_chiral_restr	0.064
r_gen_planes_refined	0.054
r_gen_planes_other	0.048
r_bond_refined_d	0.006

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	29.239
r_dihedral_angle_3_deg	8.898
r_dihedral_angle_4_deg	7.69
r_dihedral_angle_1_deg	3.421
r_angle_refined_deg	1.33
r_angle_other_deg	0.379
r_chiral_restr	0.064
r_gen_planes_refined	0.054
r_gen_planes_other	0.048
r_bond_refined_d	0.006
r_bond_other_d	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3191
Nucleic Acid Atoms	96
Solvent Atoms	531
Heterogen Atoms	70

Software

Software
Software Name	Purpose
REFMAC	refinement
PDB_EXTRACT	data extraction
HKL-3000	data reduction
HKL-3000	data scaling
PHASER	phasing

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.