RT XFEL structure of the one-flash state of Photosystem II (1F, S2-rich) at 2.26 Angstrom resolution
X-RAY DIFFRACTION
Serial Crystallography (SX)
Starting Model(s)
| Initial Refinement Model(s) | |||
|---|---|---|---|
| Type | Source | Accession Code | Details |
| experimental model | PDB | 6DHE | PDB entry 6DHE |
Crystallization
| Crystalization Experiments | ||||
|---|---|---|---|---|
| ID | Method | pH | Temperature | Details |
| 1 | BATCH MODE | 6.5 | 298 | 0.1 M MES, pH 6.5, 0.1 M ammonium chloride, 35% w/v PEG5000 |
| Crystal Properties | |
|---|---|
| Matthews coefficient | Solvent content |
| 3.16 | 61.1 |
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) |
| a = 116.958 | α = 90 |
| b = 221.639 | β = 90 |
| c = 307.888 | γ = 90 |
| Symmetry | |
|---|---|
| Space Group | P 21 21 21 |
Diffraction
| Diffraction Experiment | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Crystal ID | Scattering Type | Data Collection Temperature | Detector | Detector Type | Details | Collection Date | Monochromator | Protocol | |||||
| 1 | 1 | x-ray | 298 | CCD | RAYONIX MX340-HS | 2018-11-27 | M | SINGLE WAVELENGTH | ||||||
| Radiation Source | |||||
|---|---|---|---|---|---|
| ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
| 1 | FREE ELECTRON LASER | SLAC LCLS BEAMLINE MFX | 1.3022 | SLAC LCLS | MFX |
Serial Crystallography
| Sample delivery method | ||
|---|---|---|
| Diffraction ID | Description | Sample Delivery Method |
| 1 | Drop-on-Tape | injection |
| Measurement | |||||
|---|---|---|---|---|---|
| Diffraction ID | Pulse Duration | Pulse Repetition Rate | Focal Spot Size | Pulse Energy | Photons Per Pulse |
| 1 | 40 (fs) | 20 | 9 | 9.52 (KeV) | |
| Data Reduction | ||||
|---|---|---|---|---|
| Diffraction ID | Frames Indexed | Crystal Hits | Frames Indexed | Latices Merged |
| 1 | ||||
| Injection | |||||||
|---|---|---|---|---|---|---|---|
| Diffraction ID | Description | Flow Rate | Injector Diameter | Injection Power | Injector Nozzle | Filter Size | Carrier Solvent |
| 1 | Acoustic Droplet Ejection | 4 (µl/min) | undefined (µm) | Acoustic Wave | |||
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 | 2.26 | 33.55 | 99.6 | 0.962 | 11.8 | 41.6 | 371007 | 37.83 | |||||||||||
| 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 | 2.26 | 2.3 | 97.47 | 0.091 | 0.9 | ||||||||||||||
Refinement
| Statistics | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Diffraction ID | Structure Solution Method | Cross Validation method | Starting model | Resolution (High) | Resolution (Low) | Cut-off Sigma (F) | 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) | Mean Isotropic B | ||||
| X-RAY DIFFRACTION | MOLECULAR REPLACEMENT | FREE R-VALUE | PDB entry 6DHE | 2.26 | 33.54 | 1.33 | 371006 | 3295 | 99.79 | 0.1787 | 0.1782 | 0.1789 | 0.2379 | 0.2373 | 43.68 | ||||
| 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 | 18.17 |
| f_angle_d | 1.4542 |
| f_chiral_restr | 0.0602 |
| f_bond_d | 0.014 |
| f_plane_restr | 0.0104 |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number |
| Protein Atoms | 41525 |
| Nucleic Acid Atoms | |
| Solvent Atoms | 1573 |
| Heterogen Atoms | 8552 |
Software
| Software | |
|---|---|
| Software Name | Purpose |
| PHENIX | refinement |
| PDB_EXTRACT | data extraction |
| cctbx.xfel | data reduction |
| PHASER | phasing |
| cxi.merge | data scaling |














