2NPK
An unusual twin-His arrangement in the pore of ammonia channels is essential for substrate conductance
Experimental procedure
| Experimental method | SINGLE WAVELENGTH |
| Source type | SYNCHROTRON |
| Source details | SLS BEAMLINE X06SA |
| Synchrotron site | SLS |
| Beamline | X06SA |
| Temperature [K] | 100 |
| Detector technology | CCD |
| Collection date | 2006-03-21 |
| Detector | MARMOSAIC 225 mm CCD |
| Wavelength(s) | 0.97934 |
| Spacegroup name | P 63 |
| Unit cell lengths | 109.917, 109.917, 84.203 |
| Unit cell angles | 90.00, 90.00, 120.00 |
Refinement procedure
| Resolution | 15.000 - 2.000 |
| R-factor | 0.16631 |
| Rwork | 0.165 |
| R-free | 0.19031 |
| Structure solution method | MOLECULAR REPLACEMENT |
| Starting model (for MR) | 1xqf |
| RMSD bond length | 0.011 |
| RMSD bond angle | 1.362 |
| Data reduction software | XDS |
| Data scaling software | XSCALE |
| Phasing software | MOLREP |
| Refinement software | REFMAC (5.2.0019) |
Data quality characteristics
| Overall | Outer shell | |
| Low resolution limit [Å] | 50.000 | 2.100 |
| High resolution limit [Å] | 2.000 | 2.000 |
| Number of reflections | 39048 | |
| <I/σ(I)> | 18.24 | 3.12 |
| Completeness [%] | 99.8 | 99.9 |
Crystallization Conditions
| crystal ID | method | pH | temperature | details |
| 1 | VAPOR DIFFUSION, SITTING DROP | 4.6 | 298 | 30% PEG 400, 0.1M SODIUM ACETATE, 0.2M AMMONIUM SULFATE, PH 4.6, VAPOR DIFFUSION, SITTING DROP, TEMPERATURE 298K, pH 4.60 |
