3EAM
An open-pore structure of a bacterial pentameric ligand-gated ion channel
X-RAY DIFFRACTION
Crystallization
Crystalization Experiments | ||||
---|---|---|---|---|
ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, HANGING DROP | 4.6 | 298 | PEG 4000, NH4SCN, NaAc, pH 4.6, vapor diffusion, hanging drop, temperature 298K |
Crystal Properties | |
---|---|
Matthews coefficient | Solvent content |
5.27 | 76.66 |
Crystal Data
Unit Cell | |
---|---|
Length ( Å ) | Angle ( ˚ ) |
a = 183.32 | α = 90 |
b = 133.64 | β = 102.94 |
c = 160.18 | γ = 90 |
Symmetry | |
---|---|
Space Group | C 1 2 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 | MARMOSAIC 225 mm CCD | 2008-03-14 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
---|---|---|---|---|---|
ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | ESRF BEAMLINE ID23-2 | 0.873 | ESRF | ID23-2 |
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 | 2.9 | 25 | 0.101 | 11.34 | 3.9 | 83260 |
Highest Resolution Shell | |||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
ID # | Resolution (High) | Resolution (Low) | Percent Possible (All) | Percent Possible (Observed) | R Merge I (Observed) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) | |||||||||||
2.9 | 3.06 | 0.626 | 2.05 | 3.9 |
Refinement
Statistics | |||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Diffraction ID | Structure Solution Method | Cross Validation method | Resolution (High) | Resolution (Low) | Number Reflections (Observed) | Number Reflections (R-Free) | Percent Reflections (Observed) | R-Factor (Observed) | R-Work | R-Free | R-Free Selection Details | Mean Isotropic B | |||||||
X-RAY DIFFRACTION | THROUGHOUT | 2.9 | 10 | 77236 | 4063 | 99.97 | 0.20046 | 0.19885 | 0.2311 | RANDOM | 52.815 |
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] | |
-0.3 | -6 | 0.43 | -2.83 |
RMS Deviations | |
---|---|
Key | Refinement Restraint Deviation |
r_dihedral_angle_2_deg | 36.548 |
r_dihedral_angle_4_deg | 20.161 |
r_dihedral_angle_3_deg | 19.272 |
r_dihedral_angle_1_deg | 7.107 |
r_scangle_it | 4.996 |
r_scbond_it | 2.765 |
r_angle_refined_deg | 2.034 |
r_mcangle_it | 1.7 |
r_mcbond_it | 0.851 |
r_chiral_restr | 0.118 |
Non-Hydrogen Atoms Used in Refinement | |
---|---|
Non-Hydrogen Atoms | Number |
Protein Atoms | 12625 |
Nucleic Acid Atoms | |
Solvent Atoms | 111 |
Heterogen Atoms | 769 |
Software
Software | |
---|---|
Software Name | Purpose |
REFMAC | refinement |
PDB_EXTRACT | data extraction |