F420-nitrite reductase from Methanocaldococcus infernus at 1.58 A resolution
X-RAY DIFFRACTION
Starting Model(s)
| Initial Refinement Model(s) | |||
|---|---|---|---|
| Type | Source | Accession Code | Details |
| experimental model | PDB | 7NP8 | |
| in silico model | AlphaFold | ||
Crystallization
| Crystalization Experiments | ||||
|---|---|---|---|---|
| ID | Method | pH | Temperature | Details |
| 1 | VAPOR DIFFUSION, SITTING DROP | 6.5 | 293.15 | Prior to crystallisation, fresh sample was centrifuged at 13 000 g for 3 min to remove macro-aggregates and dust. The sample was crystallised in an anaerobic chamber filled with a N2/H2 (97:3%) atmosphere, 20 degrees Celsius. The crystallisation was done in 96-Well MRC 2-Drop polystyrene plates (SWISSCI) containing 90 uL of crystallisation solution in the reservoir. 0.7 uL of enzyme 6.5 mg/ml + 1 mM FAD was mixed with 0.7 uL of the crystallisation solution. The crystallisation solution contained 45 % w/v Pentaerythritol Propoxylate (5/4 PO/OH), 100 mM MES pH 6.5, and 400 mM Potassium chloride. The crystals appeared in 7 to 12 days. |
| Crystal Properties | |
|---|---|
| Matthews coefficient | Solvent content |
| 2.86 | 57.07 |
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) |
| a = 102.2 | α = 90 |
| b = 114.11 | β = 90 |
| c = 136.71 | γ = 90 |
| Symmetry | |
|---|---|
| Space Group | I 2 2 2 |
Diffraction
| Diffraction Experiment | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Crystal ID | Scattering Type | Data Collection Temperature | Detector | Detector Type | Details | Collection Date | Monochromator | Protocol | |||||
| 1 | 1 | x-ray | 100 | PIXEL | DECTRIS EIGER X 16M | 2024-05-18 | M | SINGLE WAVELENGTH | ||||||
| Radiation Source | |||||
|---|---|---|---|---|---|
| ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
| 1 | SYNCHROTRON | SOLEIL BEAMLINE PROXIMA 1 | 1.0332 | SOLEIL | PROXIMA 1 |
Data Collection
| Overall | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Resolution (High) | Resolution (Low) | Percent Possible (Observed) | R Merge I (Observed) | Rrim I (All) | Rpim I (All) | CC (Half) | 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 | 1.58 | 87.6 | 94.8 | 0.124 | 0.129 | 0.035 | 0.998 | 11.4 | 13.5 | 89629 | |||||||||
| Highest Resolution Shell | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Resolution (High) | Resolution (Low) | Percent Possible (All) | Percent Possible (Observed) | R Merge I (Observed) | Rrim I (All) | Rpim I (All) | CC (Half) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) | ||||||||
| 1 | 1.58 | 1.71 | 52.6 | 1.957 | 2.032 | 0.544 | 0.558 | 1.5 | 13.8 | ||||||||||
Refinement
| Statistics | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Diffraction ID | Structure Solution Method | Cross Validation 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-Free (Depositor) | Mean Isotropic B | |||||||
| X-RAY DIFFRACTION | MOLECULAR REPLACEMENT | FREE R-VALUE | 1.58 | 42.32 | 1.34 | 89621 | 4514 | 81.8 | 0.1394 | 0.138 | 0.1672 | 33.15 | |||||||
| 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 | 15.42 |
| f_angle_d | 1.314 |
| f_chiral_restr | 0.071 |
| f_plane_restr | 0.014 |
| f_bond_d | 0.011 |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number |
| Protein Atoms | 4894 |
| Nucleic Acid Atoms | |
| Solvent Atoms | 617 |
| Heterogen Atoms | 233 |
Software
| Software | |
|---|---|
| Software Name | Purpose |
| PHENIX | refinement |
| PDB_EXTRACT | data extraction |
| autoPROC | data reduction |
| autoPROC | data scaling |
| PHENIX | phasing |














