1HJ4
Cytochrome cd1 Nitrite Reductase, x-ray reduced dioxygen complex
X-RAY DIFFRACTION
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | 7 | 293 | 2.3 M AMMONIUM SULFATE 50MM POTASSIUM PHOSPHATE PH 7.0 CRYSTALS WERE REDUCED USING 20MM SODIUM DITHIONITE. THE CRYSTAL WAS TRANSFERRED TO A SOLUTION CONTAINING 2.3 M AMMONIUM SULFATE, 50 MM PHOSPAHTE BUFFER PH 7 AND 15 % GLYCEROL. O2 WAS INTRODUCED UNDER 15 ATM PRESSURE FOR 2 MINUTES AT -20 DEGREES. THE DIOXYGEN SPECIES FORMED UNDER THESE CONDITIONS WAS REDUCED UPON X-RAY EXPOSURE AND THE RESULTING STRUCTURE REPRESENTS A MIXTURE OF STATES. |
Crystal Properties | |
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Matthews coefficient | Solvent content |
2.52 | 51 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 106.69 | α = 90 |
b = 60.9 | β = 112.08 |
c = 100.59 | γ = 90 |
Symmetry | |
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Space Group | P 1 21 1 |
Diffraction
Diffraction Experiment | ||||||||||||||
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ID # | Crystal ID | Scattering Type | Data Collection Temperature | Detector | Detector Type | Details | Collection Date | Monochromator | Protocol | |||||
1 | 1 | x-ray | 100 | CCD | MARRESEARCH | 1998-12-16 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
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ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | ESRF BEAMLINE ID14-3 | ESRF | ID14-3 |
Data Collection
Overall | |||||||||||||||||||
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ID # | Resolution (High) | Resolution (Low) | Percent Possible (Observed) | R Merge I (Observed) | R Sym I (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 | 1.6 | 30 | 93.9 | 0.041 | 0.041 | 14.2 | 2.2 | 149315 | 18.2 |
Highest Resolution Shell | |||||||||||||||||||
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ID # | Resolution (High) | Resolution (Low) | Percent Possible (All) | Percent Possible (Observed) | R Merge I (Observed) | R-Sym I (Observed) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) | ||||||||||
1 | 1.6 | 1.66 | 95.3 | 0.202 | 0.202 | 2.8 |
Refinement
Statistics | |||||||||||||||||||
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Diffraction ID | Structure Solution Method | Cross Validation method | Starting model | Resolution (High) | Resolution (Low) | Number Reflections (Observed) | Number Reflections (R-Free) | Percent Reflections (Observed) | R-Work | R-Free | R-Free Selection Details | Mean Isotropic B | |||||||
X-RAY DIFFRACTION | MOLECULAR REPLACEMENT | THROUGHOUT | PDB ENTRY 1AOF | 1.6 | 30 | 149315 | 93.9 | 0.202 | 0.226 | RANDOM |
Temperature Factor Modeling | ||||||
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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 | |
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Key | Refinement Restraint Deviation |
p_transverse_tor | 29.3 |
p_special_tor | 15 |
p_staggered_tor | 10.9 |
p_planar_tor | 4.2 |
p_multtor_nbd | 0.24 |
p_singtor_nbd | 0.18 |
p_xyhbond_nbd | 0.152 |
p_chiral_restr | 0.117 |
p_plane_restr | 0.026 |
p_planar_d | 0.024 |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 8497 |
Nucleic Acid Atoms | |
Solvent Atoms | 889 |
Heterogen Atoms | 211 |
Software
Software | |
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Software Name | Purpose |
REFMAC | refinement |
DENZO | data reduction |
SCALEPACK | data scaling |