Joint X-ray/neutron structure of SARS-CoV-2 main protease (3CL Mpro) in complex with BBH-1
X-RAY DIFFRACTION - NEUTRON DIFFRACTION
Starting Model(s)
| Initial Refinement Model(s) | |||
|---|---|---|---|
| Type | Source | Accession Code | Details |
| experimental model | PDB | 7N8C | |
Crystallization
| Crystalization Experiments | ||||
|---|---|---|---|---|
| ID | Method | pH | Temperature | Details |
| 1 | VAPOR DIFFUSION, SITTING DROP | 6.6 | 287 | 20% PEG3350, 0.1 M Bis-Tris pH 6.5 |
| Crystal Properties | |
|---|---|
| Matthews coefficient | Solvent content |
| 2.91 | 57.78 |
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) |
| a = 55.02 | α = 90 |
| b = 81.217 | β = 96.72 |
| c = 88.825 | γ = 90 |
| Symmetry | |
|---|---|
| Space Group | I 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 | 293 | PIXEL | DECTRIS EIGER R 4M | OSMIC VARIMAX | 2021-10-11 | M | SINGLE WAVELENGTH | |||||
| 2 | 1 | neutron | 293 | IMAGE PLATE | MAATEL | COLLIMATORS | 2021-10-05 | L | LAUE | |||||
| Radiation Source | |||||
|---|---|---|---|---|---|
| ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
| 1 | ROTATING ANODE | RIGAKU MICROMAX-007 HF | 1.54 | ||
| 2 | NUCLEAR REACTOR | ILL BEAMLINE LADI III | 3.0-4.0 | ILL | LADI III |
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) | R Split (All) | 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 | 1.85 | 59.75 | 96.6 | 0.076 | 13.6 | 5.4 | 32013 | ||||||||||||
| 2 | 2.2 | 44.04 | 78.7 | 0.161 | 0.094 | 0.986 | 7.9 | 3.1 | 15471 | ||||||||||
| Highest Resolution Shell | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Resolution (High) | Resolution (Low) | Percent Possible (All) | R Merge I (Observed) | R-Sym I (Observed) | Rrim I (All) | Rpim I (All) | CC (Half) | R Split (All) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) | |||||||
| 1 | 1.85 | 1.92 | 0.671 | 1.4 | 5.4 | ||||||||||||||
| 2 | 2.2 | 2.32 | 0.367 | 0.223 | 0.825 | 2.1 | 2.9 | ||||||||||||
Refinement
| Statistics | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Diffraction ID | Structure Solution Method | Resolution (High) | Resolution (Low) | Cut-off Sigma (I) | Cut-off Sigma (F) | Number Reflections (All) | Number Reflections (Observed) | Number Reflections (R-Free) | Percent Reflections (Observed) | R-Factor (All) | R-Factor (Observed) | R-Work (Depositor) | R-Work (DCC) | R-Free (Depositor) | R-Free (DCC) | R-Free Selection Details | Mean Isotropic B | ||
| X-RAY DIFFRACTION | MOLECULAR REPLACEMENT | 1.85 | 29.88 | 33147 | 28704 | 1415 | 86.6 | 0.197 | 0.1842 | 0.21 | 0.199 | 33.86 | |||||||
| NEUTRON DIFFRACTION | MOLECULAR REPLACEMENT | 2.2 | 29.9 | 19760 | 13060 | 652 | 66.1 | 0.237 | 0.257 | 33.86 | |||||||||
| 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 |
| x_torsion_deg | 29.4 |
| x_torsion_deg | 29.4 |
| x_angle_deg | 1.2 |
| x_angle_deg | 1.2 |
| x_torsion_impr_deg | 0.88 |
| x_torsion_impr_deg | 0.88 |
| x_bond_d | 0.011 |
| x_bond_d | 0.011 |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number |
| Protein Atoms | 2368 |
| Nucleic Acid Atoms | |
| Solvent Atoms | 147 |
| Heterogen Atoms | 45 |
Software
| Software | |
|---|---|
| Software Name | Purpose |
| nCNS | refinement |
| CrysalisPro | data reduction |
| CrysalisPro | data scaling |
| PHASER | phasing |
| nCNS | phasing |
| LAUEGEN | data reduction |
| LSCALE | data scaling |














