Joint X-ray/neutron structure of Thermus thermophilus serine hydroxymethyltransferase (TthSHMT) in internal aldimine state
X-RAY DIFFRACTION - NEUTRON DIFFRACTION
Starting Model(s)
| Initial Refinement Model(s) | |||
|---|---|---|---|
| Type | Source | Accession Code | Details |
| experimental model | PDB | 2DKJ | |
Crystallization
| Crystalization Experiments | ||||
|---|---|---|---|---|
| ID | Method | pH | Temperature | Details |
| 1 | VAPOR DIFFUSION, SITTING DROP | 5.5 | 289 | 40 mM NaOAc pH 5.5, 1.0 M (NH4)2SO4, and 0.5 M Li2SO4 |
| Crystal Properties | |
|---|---|
| Matthews coefficient | Solvent content |
| 2.62 | 53.04 |
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) |
| a = 58.807 | α = 90 |
| b = 83.334 | β = 91.68 |
| c = 95.568 | 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 | elliptical mirrors | 2022-03-29 | L | LAUE | |||||
| 2 | 1 | x-ray | 293 | PIXEL | DECTRIS EIGER R 4M | Osmic VariMax | 2022-05-23 | 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 | 1.54 | ||
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 | 2.3 | 47.78 | 85.4 | 0.161 | 0.08 | 0.943 | 4.3 | 4.1 | 32586 | ||||||||||
| 2 | 2 | 95.54 | 99.9 | 0.091 | 0.044 | 0.993 | 17.3 | 5.4 | 62364 | ||||||||||
| 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 | 2.3 | 2.42 | 0.281 | 0.145 | 0.637 | 2.9 | 3.8 | ||||||||||||
| 2 | 2 | 2.07 | 0.364 | 0.1177 | 0.882 | 3.9 | 5.2 | ||||||||||||
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 | 2.3 | 40 | 2.5 | 31065 | 1553 | 75.5 | 0.21 | 0.239 | random | 18.35 | ||||||||
| X-RAY DIFFRACTION | MOLECULAR REPLACEMENT | 2 | 40 | 2.5 | 58902 | 2954 | 94.4 | 0.164 | 0.3363 | 0.177 | 0.3361 | random | 18.35 | ||||||
| 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 | 18 |
| x_torsion_deg | 18 |
| x_angle_deg | 1 |
| x_angle_deg | 1 |
| x_torsion_impr_deg | 0.79 |
| x_torsion_impr_deg | 0.79 |
| x_bond_d | 0.008 |
| x_bond_d | 0.008 |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number |
| Protein Atoms | 6250 |
| Nucleic Acid Atoms | |
| Solvent Atoms | 429 |
| Heterogen Atoms | 10 |
Software
| Software | |
|---|---|
| Software Name | Purpose |
| nCNS | refinement |
| CrysalisPro | data reduction |
| CrysalisPro | data scaling |
| PHASER | phasing |
| SCALA | data scaling |
| LAUEGEN | data reduction |














