From macrocrystals to microcrystals: a strategy for membrane protein serial crystallography
X-RAY DIFFRACTION
Serial Crystallography (SX)
Starting Model(s)
| Initial Refinement Model(s) | |||
|---|---|---|---|
| Type | Source | Accession Code | Details |
| experimental model | PDB | 2I5N | |
Crystallization
| Crystalization Experiments | ||||
|---|---|---|---|---|
| ID | Method | pH | Temperature | Details |
| 1 | VAPOR DIFFUSION, SITTING DROP | 6.8 | 277 | Macrocrystal growth: 10 mg/ml protein 3.6 M ammonium sulphate, 6 % w/v heptane-1,2,3-triol, 20 mM KH203/K2H03 pH 6.8, 0.1 % LDAO 20 ul sitting drop, 10 protein : 10 precipitant Microcrystals 8.5 mg/ml protein 18.5 ul sitting drop, 10 protein : 7.5 precipitant : 1 seed stock |
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) |
| a = 226.5 | α = 90 |
| b = 226.5 | β = 90 |
| c = 113.9 | γ = 90 |
| Symmetry | |
|---|---|
| Space Group | P 43 21 2 |
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 CXI-1 | 2016-06-09 | M | SINGLE WAVELENGTH | ||||||
| Radiation Source | |||||
|---|---|---|---|---|---|
| ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
| 1 | FREE ELECTRON LASER | SLAC LCLS BEAMLINE CXI | 1.307 | SLAC LCLS | CXI |
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 | 2.4 | 35.7 | 100 | 0.997 | 0.0486 | 11.2 | 1529 | 118454 | |||||||||||
| 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 | 2.4 | 2.46 | 100 | 0.438 | 1.06 | 106 | |||||||||||||
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 | 2I5N | 2.4 | 35.7 | 109673 | 5711 | 99.95 | 0.16214 | 0.16086 | 0.1679 | 0.18632 | 0.1901 | RANDOM | 81.496 | ||||
| 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] | |
| 1.21 | 1.21 | -2.42 | ||||
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| r_dihedral_angle_2_deg | 32.56 |
| r_dihedral_angle_4_deg | 14.767 |
| r_dihedral_angle_3_deg | 13.641 |
| r_long_range_B_refined | 7.989 |
| r_long_range_B_other | 7.989 |
| r_scangle_other | 6.065 |
| r_dihedral_angle_1_deg | 5.749 |
| r_mcangle_other | 5.29 |
| r_mcangle_it | 5.289 |
| r_scbond_it | 3.921 |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number |
| Protein Atoms | 9347 |
| Nucleic Acid Atoms | |
| Solvent Atoms | 146 |
| Heterogen Atoms | 909 |
Software
| Software | |
|---|---|
| Software Name | Purpose |
| REFMAC | refinement |
| CrystFEL | data reduction |
| CrystFEL | data scaling |
| PHASER | phasing |














