3IA7
Crystal Structure of CalG4, the Calicheamicin Glycosyltransferase
X-RAY DIFFRACTION
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, HANGING DROP | 277 | Protein Solution (10 mg/ml CalG4 Protein, 0.05 M NaCl, 0.005 M Tris pH 8) mixed in a 1:1 ratio with the Well Solution (19% PEG4K, 0.08 M CaCl2, 0.1 M CHES pH 9.5) Cryoprotected with 25% ethylene glycol, 19% PEG4K, 0.08 M CaCl2, 0.1 M CHES pH 9.5, vapor diffusion, hanging drop, temperature 277K |
Crystal Properties | |
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Matthews coefficient | Solvent content |
2.76 | 55.45 |
Crystal Data
Unit Cell | |
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Length ( ? ) | Angle ( ? ) |
a = 84.749 | ¦Á = 90 |
b = 66.966 | ¦Â = 93.53 |
c = 86.616 | ¦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 | MARMOSAIC 300 mm CCD | Adjustable focusing mirrors in K-B geometry | 2008-07-31 | M | MAD |
Radiation Source | |||||
---|---|---|---|---|---|
ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | APS BEAMLINE 23-ID-D | 0.97945, 0.96421 | APS | 23-ID-D |
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 | 1.91 | 50 | 98.4 | 0.074 | 11.8 | 7.2 | 74332 |
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) | |||||||||||
1 | 1.91 | 1.98 | 84.6 | 0.451 | 4.4 | 6358 |
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 | MAD | THROUGHOUT | 1.91 | 45.64 | 74257 | 3745 | 98.96 | 0.256 | 0.253 | 0.301 | RANDOM | 21.459 |
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] | |
-0.05 | 0.04 | 0.07 | -0.01 |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
r_dihedral_angle_2_deg | 34.114 |
r_dihedral_angle_4_deg | 19.046 |
r_dihedral_angle_3_deg | 13.357 |
r_dihedral_angle_1_deg | 5.901 |
r_scangle_it | 3.643 |
r_scbond_it | 2.423 |
r_angle_refined_deg | 1.567 |
r_mcangle_it | 1.565 |
r_mcbond_it | 0.947 |
r_chiral_restr | 0.111 |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 6090 |
Nucleic Acid Atoms | |
Solvent Atoms | 437 |
Heterogen Atoms | 3 |
Software
Software | |
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Software Name | Purpose |
DENZO | data reduction |
SCALEPACK | data scaling |
SHARP | phasing |
DM | phasing |
REFMAC | refinement |
PDB_EXTRACT | data extraction |
HKL-2000 | data collection |
HKL-2000 | data reduction |