Joint X-ray/neutron structure of E53Q mutant of Thermus thermophilus serine hydroxymethyltransferase (TthSHMT)
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 | 40 mM NaOAc, pH 5.5, 1M ammonium sulfate, 0.5 M lithium sulfate |
| Crystal Properties | |
|---|---|
| Matthews coefficient | Solvent content |
| 2.62 | 53.09 |
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) |
| a = 58.819 | α = 90 |
| b = 83.522 | β = 91.64 |
| c = 95.425 | 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 | MAATEL IMAGINE | 2024-10-02 | L | LAUE | ||||||
| 2 | 1 | x-ray | 293 | PIXEL | DECTRIS EIGER R 4M | 2024-10-03 | M | SINGLE WAVELENGTH | ||||||
| Radiation Source | |||||
|---|---|---|---|---|---|
| ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
| 1 | NUCLEAR REACTOR | ORNL High Flux Isotope Reactor BEAMLINE CG4D | 2.8 - 4.5 | ORNL High Flux Isotope Reactor | CG4D |
| 2 | ROTATING ANODE | RIGAKU MICROMAX-007 HF | 1.5406 | ||
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 | 2.4 | 58.8 | 77.3 | 0.183 | 0.101 | 0.957 | 3.8 | 3.5 | 28304 | ||||||||||
| 2 | 1.65 | 95.4 | 99.1 | 0.067 | 0.039 | 0.967 | 19.1 | 3.8 | 109873 | ||||||||||
| 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 | 2.4 | 2.52 | 0.301 | 0.171 | 0.686 | 2.3 | 3.1 | ||||||||||||
| 2 | 1.65 | 1.71 | 0.361 | 0.251 | 0.823 | 2.5 | 2.4 | ||||||||||||
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 | 2.4 | 40 | 2.5 | 23605 | 1120 | 65.1 | 0.236 | 0.263 | random | 19.89 | ||||||||
| X-RAY DIFFRACTION | MOLECULAR REPLACEMENT | 1.65 | 29.4 | 2.5 | 98994 | 5014 | 89.3 | 0.189 | 0.3423 | 0.197 | 0.3421 | random | 19.89 | ||||||
| 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 | 19 |
| x_torsion_deg | 19 |
| x_torsion_impr_deg | 1.12 |
| x_torsion_impr_deg | 1.12 |
| x_angle_deg | 1.1 |
| x_angle_deg | 1.1 |
| x_bond_d | 0.009 |
| x_bond_d | 0.009 |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number |
| Protein Atoms | 6250 |
| Nucleic Acid Atoms | |
| Solvent Atoms | 505 |
| Heterogen Atoms | 10 |
Software
| Software | |
|---|---|
| Software Name | Purpose |
| LAUEGEN | data reduction |
| CrysalisPro | data reduction |
| LSCALE | data scaling |
| SCALA | data scaling |
| Aimless | data scaling |
| PHASER | phasing |
| nCNS | refinement |














