Crystal structure of transcription factor NtcA from Synechococcus elongatus in complex with its transcriptional co- activator PipX and its target DNA (Crystal I)
X-RAY DIFFRACTION
Starting Model(s)
Initial Refinement Model(s) | |||
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Type | Source | Accession Code | Details |
experimental model | PDB | 9GUJ |
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, SITTING DROP | 294.15 | PipX-NTCA-DNA complex was in 50 mM sodium citrate pH 6.5, 0.5 M NaCl, 5 mM magnesium cloride, 50 mM arginine hydrocloride, 50 mM Na L-glutamate and 10mM 2-oxoglutarate. CRYSTALLIZATION SOLUTION: 0,2M MgSO4 and 20% PEG3350. Cryo protectant: 39% PEG3350 |
Crystal Properties | |
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Matthews coefficient | Solvent content |
2.46 | 49.96 |
Crystal Data
Unit Cell | |
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Length ( ? ) | Angle ( ? ) |
a = 113.26 | ¦Á = 90 |
b = 68.18 | ¦Â = 115.07 |
c = 126.25 | ¦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 | PIXEL | DECTRIS PILATUS 2M | 2012-03-10 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
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ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | DIAMOND BEAMLINE I04-1 | 0.9173 | Diamond | I04-1 |
Data Collection
Overall | |||||||||||||||||||
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ID # | Resolution (High) | Resolution (Low) | Percent Possible (Observed) | R Sym 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 | 3.8 | 114.4 | 92.2 | 0.193 | 3 | 2.8 | 16087 |
Highest Resolution Shell | |||||||||||||||||||
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ID # | Resolution (High) | Resolution (Low) | Percent Possible (All) | Percent Possible (Observed) | R-Sym I (Observed) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) | |||||||||||
1 | 3.8 | 4.01 | 0.398 |
Refinement
Statistics | |||||||||||||||||||
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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 (Depositor) | R-Work (DCC) | R-Free (Depositor) | R-Free (DCC) | R-Free Selection Details | Mean Isotropic B | |||||
X-RAY DIFFRACTION | MOLECULAR REPLACEMENT | THROUGHOUT | 3.8 | 64.14 | 15269 | 811 | 91.62 | 0.31739 | 0.3154 | 0.3085 | 0.35385 | 0.35 | RANDOM | 69.248 |
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] | |
-2.83 | 1.75 | 1.38 | -0.13 |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
r_dihedral_angle_3_deg | 19.204 |
r_dihedral_angle_2_deg | 10.407 |
r_long_range_B_refined | 7.665 |
r_long_range_B_other | 7.665 |
r_dihedral_angle_1_deg | 4.477 |
r_mcangle_it | 4.01 |
r_mcangle_other | 4.01 |
r_scangle_other | 3.316 |
r_mcbond_it | 2.426 |
r_mcbond_other | 2.426 |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 9543 |
Nucleic Acid Atoms | 2460 |
Solvent Atoms | |
Heterogen Atoms | 40 |
Software
Software | |
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Software Name | Purpose |
REFMAC | refinement |
SCALA | data scaling |
MOSFLM | data reduction |
PHASER | phasing |