3NK9
Crystal structure of Staphylococcal nuclease variant Delta+PHS V74A at cryogenic temperature
Experimental procedure
| Experimental method | SINGLE WAVELENGTH |
| Source type | SYNCHROTRON |
| Source details | NSLS BEAMLINE X25 |
| Synchrotron site | NSLS |
| Beamline | X25 |
| Temperature [K] | 100 |
| Detector technology | CCD |
| Collection date | 2010-01-25 |
| Detector | ADSC QUANTUM 315 |
| Wavelength(s) | 1.1000 |
| Spacegroup name | P 1 21 1 |
| Unit cell lengths | 31.075, 60.435, 38.129 |
| Unit cell angles | 90.00, 93.30, 90.00 |
Refinement procedure
| Resolution | 30.220 - 1.650 |
| R-factor | 0.1855 |
| Rwork | 0.181 |
| R-free | 0.22430 |
| Structure solution method | MOLECULAR REPLACEMENT |
| Starting model (for MR) | 3BDC with all H2Os Ca2+ and THP removed and the following truncations: H8A T13A Q30A K64A V74A T82A Y113A V114A and Y115A; all b-factors were reset to 20 A^2. |
| RMSD bond length | 0.015 |
| RMSD bond angle | 1.611 |
| Data reduction software | HKL-2000 |
| Data scaling software | SCALEPACK |
| Phasing software | PHASER (2.1.4) |
| Refinement software | REFMAC |
Data quality characteristics
| Overall | Inner shell | Outer shell | |
| Low resolution limit [Å] | 50.000 | 50.000 | 1.680 |
| High resolution limit [Å] | 1.650 | 4.480 | 1.650 |
| Rmerge | 0.046 | 0.038 | 0.183 |
| Number of reflections | 16836 | ||
| <I/σ(I)> | 22.3 | ||
| Completeness [%] | 98.8 | 89.7 | 96 |
| Redundancy | 7.2 | 6.8 | 6.5 |
Crystallization Conditions
| crystal ID | method | pH | temperature | details |
| 1 | VAPOR DIFFUSION, HANGING DROP | 8 | 277 | 22% MPD, 25 mM Potassium Phosphate, Calcium Chloride, pdTp, pH 8.0, vapor diffusion, hanging drop, temperature 277K |
