X-Ray structure of human Aquaporin 2 crystallized on a silicon chip
Serial Crystallography (SX)
Starting Model(s)
| Initial Refinement Model(s) |
|---|
| Type | Source | Accession Code | Details |
|---|
|
experimental model | PDB | 4NEF | |
Crystallization
| Crystalization Experiments |
|---|
| ID | Method | pH | Temperature | Details |
|---|
| 1 | VAPOR DIFFUSION, SITTING DROP | 8 | 295 | 0.1M Tris pH 8.5, 0.1M sodium chloride, 0.1M magnesium chloride, 22-25% PEG 400, cadmium chloride |
| Crystal Properties |
|---|
| Matthews coefficient | Solvent content |
|---|
| 3.48 | 64.67 |
Crystal Data
| Unit Cell |
|---|
| Length ( Å ) | Angle ( ˚ ) |
|---|
| a = 122.2 | α = 90 |
| b = 122.2 | β = 90 |
| c = 94.14 | γ = 90 |
Diffraction
| Diffraction Experiment |
|---|
| ID # | Crystal ID | Scattering Type | Data Collection Temperature | Detector | Detector Type | Details | Collection Date | Monochromator | Protocol |
|---|
| 1 | 1 | x-ray | 298 | PIXEL | CS-PAD XPP | | 2016-11-13 | M | SINGLE WAVELENGTH |
| Radiation Source |
|---|
| ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
|---|
| 1 | FREE ELECTRON LASER | SLAC LCLS BEAMLINE MFX | 1.3670 | SLAC LCLS | MFX |
Serial Crystallography
| Sample delivery method |
|---|
| Diffraction ID | Description | Sample Delivery Method |
|---|
| 1 | | fixed target |
| Fixed Target |
|---|
| Diffraction ID | Description | Sample Holding | Support Base | Motion control | Details | Sample Solvent |
|---|
| 1 | on-chip crystallization | single crystalline silicon chip | aluminum support | Roadrunner II | | none, naked crystals |
| Measurement |
|---|
| Diffraction ID | Pulse Duration | Pulse Repetition Rate | Focal Spot Size | Pulse Energy | Photons Per Pulse |
|---|
| 1 | 60 (fs) | | 1 | 9.07 (KeV) | |
| Data Reduction |
|---|
| Diffraction ID | Frames Indexed | Crystal Hits | Frames Indexed | Latices Merged |
|---|
| 1 | | 3377 | | |
Data Collection
| Overall |
|---|
| ID # | Resolution (High) | Resolution (Low) | Percent Possible (Observed) | 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 | 3.7 | 37.38 | 99.97 | 0.783 | 0.437 | 2.32 | 28.1 | | 14866 | | | 104.8 |
| Highest Resolution Shell |
|---|
| ID # | Resolution (High) | Resolution (Low) | Percent Possible (All) | Percent Possible (Observed) | CC (Half) | R Split (All) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) |
|---|
| 1 | 3.7 | 3.76 | 99.93 | | 0.105 | 1.538 | 0.92 | 17.7 | |
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 | 4NEF | 3.7 | 33.892 | 1.33 | 14805 | 1488 | 99.13 | 0.2873 | 0.2818 | 0.28 | 0.3357 | 0.33 | 105.453 |
| 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 | 13.439 |
| f_angle_d | 0.761 |
| f_chiral_restr | 0.04 |
| f_plane_restr | 0.007 |
| f_bond_d | 0.004 |
| Non-Hydrogen Atoms Used in Refinement |
|---|
| Non-Hydrogen Atoms | Number |
|---|
| Protein Atoms | 6608 |
| Nucleic Acid Atoms | |
| Solvent Atoms | 4 |
| Heterogen Atoms | 3 |
Software
| Software |
|---|
| Software Name | Purpose |
|---|
| PHENIX | refinement |
| Coot | model building |
| PHASER | phasing |
| PDB_EXTRACT | data extraction |
| CrystFEL | data reduction |
| CrystFEL | data scaling |