397D
A 1.3 A RESOLUTION CRYSTAL STRUCTURE OF THE HIV-1 TRANS-ACTIVATION RESPONSE REGION RNA STEM REVEALS A METAL ION-DEPENDENT BULGE CONFORMATION
X-RAY DIFFRACTION
Crystallization
Crystalization Experiments | ||||
---|---|---|---|---|
ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, HANGING DROP | 6 | 292 | pH 6.00, VAPOR DIFFUSION, HANGING DROP, temperature 292.00K |
Crystal Properties | |
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Matthews coefficient | Solvent content |
2.25 | 45.24 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 27.1 | α = 69.2 |
b = 27.1 | β = 77.5 |
c = 31.6 | γ = 63 |
Symmetry | |
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Space Group | P 1 |
Diffraction
Diffraction Experiment | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
ID # | Crystal ID | Scattering Type | Data Collection Temperature | Detector | Detector Type | Details | Collection Date | Monochromator | Protocol | |||||
1 | 1 | x-ray | 100 | CCD | PRINCETON 2K | 1997-05-01 | ||||||||
2 | 1 | x-ray | IMAGE PLATE | RIGAKU RAXIS IV |
Radiation Source | |||||
---|---|---|---|---|---|
ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | CHESS BEAMLINE A1 | CHESS | A1 | |
2 | ROTATING ANODE | RIGAKU RU300 |
Data Collection
Overall | |||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
ID # | Resolution (High) | Resolution (Low) | Percent Possible (Observed) | R Merge 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 | 1.3 | 20 | 95 | 0.06 | 4.8 | 17465 | -3 |
Refinement
Statistics | |||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Diffraction ID | Structure Solution Method | Cross Validation method | Resolution (High) | Resolution (Low) | Number Reflections (All) | 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 | R FREE | 1.3 | 20 | 17465 | 1731 | 85 | 0.131 | 0.126 | 0.177 | 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] | |
RMS Deviations | |
---|---|
Key | Refinement Restraint Deviation |
s_angle_d | 0.025 |
s_bond_d | 0.009 |
s_similar_dist | |
s_from_restr_planes | |
s_zero_chiral_vol | |
s_non_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 | 567 |
Solvent Atoms | 178 |
Heterogen Atoms | 4 |
Software
Software | |
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Software Name | Purpose |
SHELXL-97 | refinement |
DENZO | data reduction |
SCALEPACK | data scaling |