Light Harvesting Protein Phycocyanin in high resolution using a femtosecond X-Ray laser
X-RAY DIFFRACTION
Crystallization
| Crystalization Experiments | ||||
|---|---|---|---|---|
| ID | Method | pH | Temperature | Details |
| 1 | Batch | 7 | 277 | 10-18 % PEG 3350, 10-100 mM NaCl, 0-100 mM MgCl2, pH 7.0, Batch, temperature 277K |
| Crystal Properties | |
|---|---|
| Matthews coefficient | Solvent content |
| 3.13 | 60.74 |
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) |
| a = 192.8 | α = 90 |
| b = 192.8 | β = 90 |
| c = 62.5 | γ = 120 |
| Symmetry | |
|---|---|
| Space Group | H 3 2 |
Diffraction
| Diffraction Experiment | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Crystal ID | Scattering Type | Data Collection Temperature | Detector | Detector Type | Details | Collection Date | Monochromator | Protocol | |||||
| 1 | 1 | x-ray | 283 | PIXEL | Cornell-SLAC Pixel Array Detector (CSPAD) | 2014-01-25 | M | SINGLE WAVELENGTH | ||||||
| Radiation Source | |||||
|---|---|---|---|---|---|
| ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
| 1 | FREE ELECTRON LASER | SLAC LCLS BEAMLINE CXI | 1.34 | SLAC LCLS | CXI |
Data Collection
| Overall | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Resolution (High) | Resolution (Low) | Percent Possible (Observed) | 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 | 36.436 | 100 | 37798 | 37798 | 1.37 | |||||||||||||
Refinement
| Statistics | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Diffraction ID | Structure Solution Method | 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 | 1.85 | 36.436 | 1.37 | 37798 | 1952 | 100 | 0.2079 | 0.2042 | 0.209 | 0.2746 | 0.2725 | 29.0429 | ||||||
| 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 | 17.703 |
| f_angle_d | 1.425 |
| f_chiral_restr | 0.056 |
| f_bond_d | 0.015 |
| f_plane_restr | 0.005 |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number |
| Protein Atoms | 2497 |
| Nucleic Acid Atoms | |
| Solvent Atoms | 189 |
| Heterogen Atoms | 129 |
Software
| Software | |
|---|---|
| Software Name | Purpose |
| PHASER | phasing |
| PHENIX | refinement |
| PDB_EXTRACT | data extraction |
| Cheetah | data collection |
| CrystFEL | data reduction |
| CrystFEL | data scaling |
