2YCT
Tyrosine phenol-lyase from Citrobacter freundii in complex with pyridine N-oxide and the quinonoid intermediate formed with L-alanine
X-RAY DIFFRACTION
Starting Model(s)
Initial Refinement Model(s) | |||
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Type | Source | Accession Code | Details |
experimental model | PDB | 2EZ2 | PDB ENTRY 2EZ2 |
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, HANGING DROP | 8 | 293 | CRYSTALS OF THE C. FREUNDII TPL WERE GROWN AT 277 AND 293 K USING THE HANGING DROP VAPOR DIFFUSION METHOD. THE BEST CRYSTALS WERE OBTAINED BY MIXING 2 UL OF THE PROTEIN SOLUTION (18-20 MG/ML) CONTAINING 50MM K-PHOSPHATE PH 8.0, 0.5 MM PLP, 1MM DDT WITH AN EQUAL VOLUME OF THE RESERVOIR SOLUTION CONTAINING 50 MM TRIETHANOLAMINE BUFFER (PH 8.0), 0.5 MM PLP, 2 MM DDT, 0.4 M KCL, AND 35-38% (W/V) POLY(ETHYLENE GLYCOL) 5000 MONOMETHYL ETHER. THE ALANINE QUINONOID COMPLEX WITH PYRIDINE N-OXIDE (9PO) WAS PREPARED BY SOAKING WILD TYPE TPL CRYSTALS IN THE STABILIZATION SOLUTION CONTAINING 40% (W/V) POLY(ETHYLENE GLYCOL) 5000 MONOMETHYL ETHER (PEG 5000 MME), 50 MM TRIETHANOLAMINE PH 8.0, 0.25 M KCL, 0.2 MM PYRIDOXAL 5-PHOSPHATE (PLP), 0.5 MM DITHIOTHREITOL (DTT), WITH ADDITION OF 100 MM L- ALANINE AND A SATURATING CONCENTRATION OF PYRIDINE N-OXIDE. SINCE THE CRYSTALS QUALITY DETERIORATED RAPIDLY, THE SOAKING TIME WAS RESTRICTED TO ABOUT 20 S. |
Crystal Properties | |
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Matthews coefficient | Solvent content |
2.8 | 56.5 |
Crystal Data
Unit Cell | |
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Length ( ? ) | Angle ( ? ) |
a = 133.993 | ¦Á = 90 |
b = 143.77 | ¦Â = 90 |
c = 60.081 | ¦Ã = 90 |
Symmetry | |
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Space Group | P 21 21 2 |
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 | IMAGE PLATE | MARRESEARCH | 1999-09-21 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
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ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | ROTATING ANODE | RIGAKU RU200 |
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 | 2.25 | 20 | 99 | 0.05 | 13.8 | 3.4 | 55230 | -3 |
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 | 2.25 | 2.29 | 94 | 0.17 | 4.5 | 2.8 |
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 2EZ2 | 2.25 | 20 | 54235 | 995 | 98.68 | 0.14003 | 0.13926 | 0.1811 | RANDOM | 28.85 |
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] | |
-0.44 | -0.53 | 0.97 |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
r_dihedral_angle_2_deg | 32.773 |
r_dihedral_angle_3_deg | 14.479 |
r_dihedral_angle_4_deg | 13.947 |
r_dihedral_angle_1_deg | 6.087 |
r_scangle_it | 5.656 |
r_scbond_it | 4.133 |
r_mcangle_it | 2.104 |
r_angle_refined_deg | 1.335 |
r_mcbond_it | 1.25 |
r_chiral_restr | 0.093 |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 7208 |
Nucleic Acid Atoms | |
Solvent Atoms | 791 |
Heterogen Atoms | 101 |
Software
Software | |
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Software Name | Purpose |
REFMAC | refinement |
DENZO | data reduction |
SCALEPACK | data scaling |
AMoRE | phasing |