3Q4D
Crystal structure of dipeptide epimerase from Cytophaga hutchinsonii complexed with Mg and dipeptide D-Ala-L-Ala
X-RAY DIFFRACTION
Starting Model(s)
Initial Refinement Model(s) | |||
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Type | Source | Accession Code | Details |
experimental model | PDB | 1TKK |
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, HANGING DROP | 4 | 277 | Precipitant contained 10% PEG 4000 and 0.1M Na-citrate. Protein solution contained 0.1M NaCl, 10% glycerol, and 0.02M D-Ala-L-Ala, Protein concentration was 40 mg/mL, pH 4.0, VAPOR DIFFUSION, HANGING DROP, temperature 277K |
Crystal Properties | |
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Matthews coefficient | Solvent content |
3.69 | 66.68 |
Crystal Data
Unit Cell | |
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Length ( ? ) | Angle ( ? ) |
a = 94.56 | ¦Á = 90 |
b = 158.09 | ¦Â = 100.04 |
c = 182.18 | ¦Ã = 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 | RAYONIX MX-225 | 2010-06-03 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
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ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | APS BEAMLINE 21-ID-F | 0.97872 | APS | 21-ID-F |
Data Collection
Overall | |||||||||||||||||||
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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 | 3 | 20 | 99.8 | 0.138 | 11.88 | 10.3 | 105392 |
Highest Resolution Shell | |||||||||||||||||||
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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) | |||||||||||
1 | 3 | 3.11 | 100 | 0.716 | 2.4 | 10779 |
Refinement
Statistics | |||||||||||||||||||
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Diffraction ID | Structure Solution Method | Cross Validation method | Starting model | 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 | MOLECULAR REPLACEMENT | THROUGHOUT | 1TKK | 3 | 20 | 105134 | 99878 | 5256 | 99.98 | 0.274 | 0.23106 | 0.22988 | 0.25388 | RANDOM | 66.3 |
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] | |
0.01 | -0.19 | 0.15 | -0.24 |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
r_dihedral_angle_2_deg | 35.082 |
r_dihedral_angle_4_deg | 26.178 |
r_dihedral_angle_3_deg | 16.4 |
r_scangle_it | 11.768 |
r_scbond_it | 9.031 |
r_mcangle_it | 7.808 |
r_mcbond_it | 5.745 |
r_dihedral_angle_1_deg | 4.878 |
r_angle_refined_deg | 1.009 |
r_chiral_restr | 0.069 |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 25434 |
Nucleic Acid Atoms | |
Solvent Atoms | 131 |
Heterogen Atoms | 108 |
Software
Software | |
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Software Name | Purpose |
HKL-2000 | data collection |
PHASER | phasing |
REFMAC | refinement |
XDS | data reduction |
XDS | data scaling |