1KFF
An engineered streptavidin with improved affinity for the strep-tag II peptide: apo-SAM1
Experimental procedure
Experimental method | SINGLE WAVELENGTH |
Source type | ROTATING ANODE |
Source details | RIGAKU RU300 |
Temperature [K] | 298 |
Detector technology | IMAGE PLATE |
Collection date | 2001-01-10 |
Detector | MARRESEARCH |
Wavelength(s) | 1.5418 |
Spacegroup name | P 1 21 1 |
Unit cell lengths | 58.419, 86.916, 47.196 |
Unit cell angles | 90.00, 98.90, 90.00 |
Refinement procedure
Resolution | 41.100 - 1.900 |
R-factor | 0.17 * |
Rwork | 0.170 |
R-free | 0.22900 * |
Structure solution method | FOURIER SYNTHESIS |
Starting model (for MR) | 1swu |
RMSD bond length | 0.016 |
RMSD bond angle | 2.868 |
Data reduction software | DENZO |
Data scaling software | SCALEPACK |
Phasing software | CNS |
Refinement software | CNS |
Data quality characteristics
Overall | Outer shell | |
Low resolution limit [Å] | 99.000 * | 1.970 |
High resolution limit [Å] | 1.900 | 1.900 |
Rmerge | 0.050 * | |
Total number of observations | 52768 * | |
Number of reflections | 33067 * | |
<I/σ(I)> | 13.2 | 1.9 |
Completeness [%] | 89.2 | 85.5 |
Redundancy | 1.6 | 1.5 |
Crystallization Conditions
crystal ID | method | pH | temperature | details |
1 | VAPOR DIFFUSION, HANGING DROP | 8 * | 20 * | 100 mM Na2HPO4, 1.2-M (NH4)2SO4, pH 7.3, VAPOR DIFFUSION, HANGING DROP, temperature 293K |
Crystallization Reagents in Literatures
ID | crystal ID | solution | reagent name | concentration (unit) | details |
1 | 1 | drop | protein | 22 (mg/ml) | |
2 | 1 | drop | Tris-HCl | 5 (mM) | pH8.0 |