1KL3
an engineered streptavidin with improved affinity for the strep-tag II peptide : SAm1-StrepII
X-RAY DIFFRACTION
Starting Model(s)
Initial Refinement Model(s) | |||
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Type | Source | Accession Code | Details |
experimental model | PDB | 1SWU |
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, HANGING DROP | 6.9 | 293 | 100 mM Na2HPO4, 1.3-M (NH4)2SO4, pH 6.9, VAPOR DIFFUSION, HANGING DROP, temperature 293K |
Crystal Properties | |
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Matthews coefficient | Solvent content |
2.2 | 44 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 58.699 | α = 90 |
b = 86.339 | β = 98.92 |
c = 47.448 | γ = 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 | 298 | IMAGE PLATE | MARRESEARCH | OSMIC MIRRORS | 2001-07-21 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
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ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | ROTATING ANODE | RIGAKU RU300 |
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 | 1.7 | 36 | 94.8 | 0.04 | 23.8 | 2.6 | 49002 | -3 |
Highest Resolution Shell | |||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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) | |||||||||||
1.7 | 1.76 | 90.3 | 0.348 | 3.2 | 2.38 | 4648 |
Refinement
Statistics | |||||||||||||||||||
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Diffraction ID | Structure Solution 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 | FOURIER SYNTHESIS | 1SWU | 1.7 | 36 | 46287 | 2430 | 94.84 | 0.1768 | 0.1746 | 0.2169 | RANDOM | 25.447 |
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] | |
-0.42 | 0.16 | 0.16 | 0.31 |
RMS Deviations | |
---|---|
Key | Refinement Restraint Deviation |
p_angle_d | 2.773 |
p_bond_d | 0.018 |
p_angle_deg | |
p_planar_d | |
p_hb_or_metal_coord | |
p_mcbond_it | |
p_mcangle_it | |
p_scbond_it | |
p_scangle_it | |
p_plane_restr |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 3816 |
Nucleic Acid Atoms | |
Solvent Atoms | 238 |
Heterogen Atoms |
Software
Software | |
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Software Name | Purpose |
CNS | refinement |
REFMAC | refinement |
DENZO | data reduction |
SCALEPACK | data scaling |
CNS | phasing |