X-ray crystallographic structure of the NS3 helicase domain from Tick-borne encephalitis virus
X-RAY DIFFRACTION
Starting Model(s)
| Initial Refinement Model(s) | |||
|---|---|---|---|
| Type | Source | Accession Code | Details |
| experimental model | PDB | 5GJC | |
Crystallization
| Crystalization Experiments | ||||
|---|---|---|---|---|
| ID | Method | pH | Temperature | Details |
| 1 | VAPOR DIFFUSION, SITTING DROP | 293 | Crystals were initially identified in the Morpheus II screen condition G5 (15% PEG 3K, 20% 1,2,4 butanetriol, 1% NDSB-256, 20 mM arginine, 20 mM threonine, 20 mM histidine, 20 mM hydroxylysine, 20 mM trans-4-hydroxy-L-proline, and buffered by 50 mM BES and 50 mM triethanolamine at pH 7.5). Seeds were generated from this condition and used for random microseed matrix screening (rMMS) using a protein concentration of 10-12 mg/ml. Final crystals were identified in the Index HT screen condition H2 (0.2 M Potassium sodium tartrate tetrahydrate, 20% w/v Polyethylene glycol 3,350). Crystals were cryoprotected by transfer to a drop containing a 4:1 ratio of precipitant ethylene glycol | |
| Crystal Properties | |
|---|---|
| Matthews coefficient | Solvent content |
| 2.24 | 44.97 |
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) |
| a = 42.787 | α = 90 |
| b = 55.442 | β = 93.75 |
| c = 91.267 | γ = 90 |
| Symmetry | |
|---|---|
| Space Group | P 1 21 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 | 2019-09-06 | M | SINGLE WAVELENGTH | ||||||
| Radiation Source | |||||
|---|---|---|---|---|---|
| ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
| 1 | SYNCHROTRON | NSLS-II BEAMLINE 17-ID-1 | 0.920089 | NSLS-II | 17-ID-1 |
Data Collection
| Overall | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Resolution (High) | Resolution (Low) | Percent Possible (Observed) | R Merge 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 | 1.95 | 45.55 | 99.5 | 0.123 | 0.135 | 0.053 | 0.986 | 7.7 | 6.1 | 31169 | |||||||||
| Highest Resolution Shell | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Resolution (High) | Resolution (Low) | Percent Possible (All) | Percent Possible (Observed) | R Merge I (Observed) | Rrim I (All) | Rpim I (All) | CC (Half) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) | ||||||||
| 1 | 1.95 | 2 | 93.7 | 0.28 | 0.327 | 0.162 | 0.453 | 4.2 | |||||||||||
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 (Depositor) | R-Work (DCC) | R-Free (Depositor) | R-Free (DCC) | R-Free Selection Details | Mean Isotropic B | ||||
| X-RAY DIFFRACTION | MOLECULAR REPLACEMENT | THROUGHOUT | 5GJC | 1.95 | 45.55 | 29614 | 1523 | 99.45 | 0.1841 | 0.1821 | 0.19 | 0.2237 | 0.23 | RANDOM | 26.02 | ||||
| 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] | |
| 1.16 | 1.36 | -2.97 | 1.62 | |||
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| r_dihedral_angle_2_deg | 28.36 |
| r_dihedral_angle_4_deg | 17.739 |
| r_dihedral_angle_3_deg | 13.281 |
| r_dihedral_angle_1_deg | 6.751 |
| r_angle_refined_deg | 1.632 |
| r_angle_other_deg | 1.371 |
| r_chiral_restr | 0.079 |
| r_bond_refined_d | 0.01 |
| r_gen_planes_refined | 0.009 |
| r_bond_other_d | 0.001 |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number |
| Protein Atoms | 3346 |
| Nucleic Acid Atoms | |
| Solvent Atoms | 184 |
| Heterogen Atoms | |
Software
| Software | |
|---|---|
| Software Name | Purpose |
| REFMAC | refinement |
| Aimless | data scaling |
| PHASER | phasing |
| PDB_EXTRACT | data extraction |
| xia2 | data reduction |
