1SA3
An asymmetric complex of restriction endonuclease MspI on its palindromic DNA recognition site
X-RAY DIFFRACTION
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, HANGING DROP | 6.5 | MES, ammonium sulfate, calcium chloride, PEG 8000, glycerol, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 100K |
Crystal Properties | |
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Matthews coefficient | Solvent content |
2.67 | 53.58 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 50.193 | α = 90 |
b = 131.601 | β = 109.69 |
c = 59.318 | 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 | BRANDEIS - B4 | double-crystal monochromator Si(111), beam focused by a toroidal mirror | 2000-05-20 | M | SINGLE WAVELENGTH | |||||
2 | 1 | x-ray | M | SINGLE WAVELENGTH | ||||||||||
3 | 1 | x-ray | M | MAD |
Radiation Source | |||||
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ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | NSLS BEAMLINE X12C | 0.9207 | NSLS | X12C |
Data Collection
Overall | |||||||||||||||||||
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ID # | Resolution (High) | Resolution (Low) | Percent Possible (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 | ||||||||
1,2,3 | 1.95 | 100 | 97.4 | 0.043 | 24.5 | 2.93 | 53664 | 52241 | -2.5 | 12.3 |
Highest Resolution Shell | |||||||||||||||||||
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ID # | Resolution (High) | Resolution (Low) | Percent Possible (All) | Percent Possible (Observed) | R-Sym I (Observed) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) | |||||||||||
1.95 | 1.98 | 99.9 | 0.275 | 3.6 | 2.89 | 2671 |
Refinement
Statistics | |||||||||||||||||||
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Diffraction ID | Structure Solution Method | Cross Validation method | Resolution (High) | Resolution (Low) | Number Reflections (All) | Number Reflections (Observed) | Number Reflections (R-Free) | Percent Reflections (Observed) | R-Factor (All) | R-Factor (Observed) | R-Work | R-Free | R-Free Selection Details | Mean Isotropic B | |||||
X-RAY DIFFRACTION | combination of MAD and MIRAS | THROUGHOUT | 1.95 | 42.58 | 51260 | 51260 | 5172 | 97.3 | 0.225 | 0.225 | 0.223 | 0.252 | RANDOM | 28.2 |
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] | |
-2.04 | 2.02 | 5.24 | -3.2 |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
c_dihedral_angle_d | 20.8 |
c_scangle_it | 3.84 |
c_scbond_it | 2.69 |
c_mcangle_it | 2.5 |
c_mcbond_it | 1.83 |
c_angle_deg | 1.2 |
c_improper_angle_d | 0.88 |
c_bond_d | 0.005 |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 4206 |
Nucleic Acid Atoms | 726 |
Solvent Atoms | 331 |
Heterogen Atoms | 2 |
Software
Software | |
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Software Name | Purpose |
CNS | refinement |
DENZO | data reduction |
SCALEPACK | data scaling |
DM | phasing |