1FQ2
CRYSTAL STRUCTURE ANALYSIS OF THE POTASSIUM FORM OF B-DNA DODECAMER CGCGAATTCGCG
X-RAY DIFFRACTION
Crystallization
Crystalization Experiments | ||||
---|---|---|---|---|
ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, SITTING DROP | 6.5 | 295 | MgCl2, Potassium Cacodylate, Spermine, MPD, DNA. pH 6.5, VAPOR DIFFUSION, SITTING DROP at 295K, VAPOR DIFFUSION, SITTING DROP |
Crystal Properties | |
---|---|
Matthews coefficient | Solvent content |
2.28 | 45.97 |
Crystal Data
Unit Cell | |
---|---|
Length ( Å ) | Angle ( ˚ ) |
a = 25.588 | α = 90 |
b = 40.818 | β = 90 |
c = 66.673 | γ = 90 |
Symmetry | |
---|---|
Space Group | P 21 21 21 |
Diffraction
Diffraction Experiment | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
ID # | Crystal ID | Scattering Type | Data Collection Temperature | Detector | Detector Type | Details | Collection Date | Monochromator | Protocol | |||||
1 | 1 | x-ray | 100 | AREA DETECTOR | M | SINGLE WAVELENGTH |
Radiation Source | |||||
---|---|---|---|---|---|
ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | NSLS BEAMLINE X26C | NSLS | X26C |
Data Collection
Overall | |||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
ID # | Resolution (High) | Resolution (Low) | Percent Possible (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 | 1.2 | 10 | 19368 |
Refinement
Statistics | |||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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 | AB INITIO | FREE R | 1.2 | 10 | 19368 | 19368 | 1933 | 86 | 0.1392 | 0.141 | 0.215 | RANDOM |
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] | |
Coordinate Error | ||
---|---|---|
Structure Solution Method | Refinement High Resolution | Refinement Low Resolution |
272 | 678 |
RMS Deviations | |
---|---|
Key | Refinement Restraint Deviation |
s_angle_d | 0.037 |
s_from_restr_planes | 0.0232 |
s_bond_d | 0.016 |
s_non_zero_chiral_vol | 0.015 |
s_similar_dist | |
s_zero_chiral_vol | |
s_anti_bump_dis_restr | |
s_rigid_bond_adp_cmpnt | |
s_similar_adp_cmpnt | |
s_approx_iso_adps |
Non-Hydrogen Atoms Used in Refinement | |
---|---|
Non-Hydrogen Atoms | Number |
Protein Atoms | |
Nucleic Acid Atoms | 486 |
Solvent Atoms | 181 |
Heterogen Atoms | 14 |
Software
Software | |
---|---|
Software Name | Purpose |
SHELXS | phasing |
SHELXL-97 | refinement |
DENZO | data reduction |
SCALEPACK | data scaling |