2BG7
Bacillus cereus metallo-beta-lactamase (BcII) Arg (121) Cys mutant. Solved at pH4.5 using 20 Micromolar ZnSO4 in the buffer. 1mM DTT was used as a reducing agent. Cys221 is oxidized.
X-RAY DIFFRACTION
Starting Model(s)
Initial Refinement Model(s) | |||
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Type | Source | Accession Code | Details |
experimental model | PDB | 1BC2 | PDB ENTRY 1BC2 |
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, HANGING DROP | 4.5 | 291 | PROTEIN WAS CRYSTALLISED USING HANGING DROP VAPOR DIFFUSION. RESERVOIR SOLUTION CONTAINED 100MM TRIS AT PH4.5-5, 70-75% AMMONIUM SULPHATE, 1MM DTT OR 1MM DTT AND 1MM TCEP-HCL, 2MM ZNSO4 AND 0.1% AZIDE. PROTEIN CONCENTRATION OF 2.7MG/ML. DROPS WERE KEPT AT 291K AND WERE STREAK SEEDED FROM A WILD TYPE CRYSTAL AFTER 1 DAY., PH 4.50 |
Crystal Properties | |
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Matthews coefficient | Solvent content |
2.36 | 47.9 |
Crystal Data
Unit Cell | |
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Length ( ? ) | Angle ( ? ) |
a = 67.578 | ¦Á = 90 |
b = 67.578 | ¦Â = 90 |
c = 178.769 | ¦Ã = 120 |
Symmetry | |
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Space Group | P 31 2 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 | MARRESEARCH | 2001-03-30 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
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ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | ESRF BEAMLINE ID13 | ESRF | ID13 |
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 | 2.1 | 59.76 | 98.9 | 0.06 | 9.4 | 4.9 | 28092 | 2 | 19.7 |
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 | 2.1 | 2.15 | 92.2 | 0.18 | 4 | 3.8 |
Refinement
Statistics | |||||||||||||||||||
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Diffraction ID | Structure Solution Method | Cross Validation method | Starting model | 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 | MOLECULAR REPLACEMENT | THROUGHOUT | PDB ENTRY 1BC2 | 2.1 | 6 | 28092 | 1354 | 98.6 | 0.1904 | 0.1904 | 0.222 | RANDOM | 22.91 |
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 | |
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Key | Refinement Restraint Deviation |
c_dihedral_angle_d | 23.95 |
c_angle_deg | 1.34 |
c_improper_angle_d | 0.84 |
c_bond_d | 0.008 |
c_bond_d_na | |
c_bond_d_prot | |
c_angle_d | |
c_angle_d_na | |
c_angle_d_prot | |
c_angle_deg_na |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 3356 |
Nucleic Acid Atoms | |
Solvent Atoms | 348 |
Heterogen Atoms | 94 |
Software
Software | |
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Software Name | Purpose |
CNS | refinement |
DENZO | data reduction |
SCALA | data scaling |
CNS | phasing |