Room-temperature joint X-ray/Neutron structure of Thermus thermophilus SHMT in complex with PLP-Gly external aldimine and 5-methyl-tetrahydrofolate (5MTHF)
X-RAY DIFFRACTION - NEUTRON DIFFRACTION
Starting Model(s)
| Initial Refinement Model(s) | |||
|---|---|---|---|
| Type | Source | Accession Code | Details |
| experimental model | PDB | 8SUJ | |
Crystallization
| Crystalization Experiments | ||||
|---|---|---|---|---|
| ID | Method | pH | Temperature | Details |
| 1 | VAPOR DIFFUSION, SITTING DROP | 5.5 | 289 | 50mM NaOAc, 0.5M Li2SO4, 1.0M Ammonium SO4 |
| Crystal Properties | |
|---|---|
| Matthews coefficient | Solvent content |
| 2.65 | 53.55 |
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) |
| a = 58.917 | α = 90 |
| b = 83.683 | β = 91.64 |
| c = 95.523 | 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 | neutron | 293 | IMAGE PLATE | LADI III | 2024-04-24 | L | LAUE | ||||||
| 2 | 1 | x-ray | 293 | PIXEL | DECTRIS EIGER R 4M | 2024-08-07 | M | SINGLE WAVELENGTH | ||||||
| Radiation Source | |||||
|---|---|---|---|---|---|
| ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
| 1 | NUCLEAR REACTOR | ILL BEAMLINE LADI III | 2.8-3.75 | ILL | LADI III |
| 2 | ROTATING ANODE | RIGAKU MICROMAX-007 HF | 1.54 | ||
Data Collection
| Overall | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Resolution (High) | Resolution (Low) | Percent Possible (Observed) | R Merge I (Observed) | R Sym I (Observed) | Rrim I (All) | Rpim I (All) | 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 | 2.1 | 50.7 | 76.6 | 0.224 | 0.989 | 6.3 | 5.2 | 40997 | |||||||||||
| 2 | 1.7 | 95.5 | 99.3 | 0.089 | 0.989 | 21.7 | 4.2 | 101159 | |||||||||||
| Highest Resolution Shell | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Resolution (High) | Resolution (Low) | Percent Possible (All) | R Merge I (Observed) | R-Sym I (Observed) | Rrim I (All) | Rpim I (All) | CC (Half) | R Split (All) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) | |||||||
| 1 | 2.1 | 2.21 | 0.495 | 0.718 | 2.5 | 5.5 | |||||||||||||
| 2 | 1.7 | 1.76 | 0.487 | 0.667 | 1.8 | 3 | |||||||||||||
Refinement
| Statistics | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Diffraction ID | Structure Solution Method | Resolution (High) | Resolution (Low) | Cut-off Sigma (I) | Cut-off Sigma (F) | Number Reflections (All) | Number Reflections (Observed) | Number Reflections (R-Free) | Percent Reflections (Observed) | R-Factor (All) | R-Factor (Observed) | R-Work (Depositor) | R-Work (DCC) | R-Free (Depositor) | R-Free (DCC) | R-Free Selection Details | Mean Isotropic B | ||
| NEUTRON DIFFRACTION | MOLECULAR REPLACEMENT | 2.1 | 36.58 | 2.5 | 36440 | 1901 | 67.5 | 0.292 | 0.327 | random | 19.2 | ||||||||
| X-RAY DIFFRACTION | MOLECULAR REPLACEMENT | 1.7 | 29.45 | 2.5 | 91923 | 4528 | 90.2 | 0.181 | 0.3527 | 0.195 | 0.3603 | random | 19.2 | ||||||
| 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 |
| x_torsion_deg | 17.9 |
| x_torsion_deg | 17.9 |
| x_torsion_impr_deg | 1.65 |
| x_torsion_impr_deg | 1.65 |
| x_angle_deg | 1 |
| x_angle_deg | 1 |
| x_bond_d | 0.007 |
| x_bond_d | 0.007 |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number |
| Protein Atoms | 6220 |
| Nucleic Acid Atoms | |
| Solvent Atoms | 397 |
| Heterogen Atoms | 78 |
Software
| Software | |
|---|---|
| Software Name | Purpose |
| CrysalisPro | data reduction |
| LAUEGEN | data reduction |
| CrysalisPro | data scaling |
| LSCALE | data scaling |
| PHASER | phasing |
| nCNS | refinement |














