2HG5
Cs+ complex of a K channel with an amide to ester substitution in the selectivity filter
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 | 2005-07-05 |
| Detector | ADSC QUANTUM 315 |
| Wavelength(s) | 1.1 |
| Spacegroup name | I 4 |
| Unit cell lengths | 156.597, 156.597, 75.706 |
| Unit cell angles | 90.00, 90.00, 90.00 |
Refinement procedure
| Resolution | 26.100 - 2.750 |
| Rwork | 0.239 |
| R-free | 0.27100 |
| Structure solution method | MOLECULAR REPLACEMENT |
| RMSD bond length | 0.008 |
| RMSD bond angle | 1.400 |
| Data reduction software | DENZO |
| Data scaling software | SCALEPACK |
| Phasing software | MOLREP |
| Refinement software | CNS (1.1) |
Data quality characteristics
| Overall | Outer shell | |
| Low resolution limit [Å] | 100.000 | 2.850 |
| High resolution limit [Å] | 2.750 | 2.750 |
| Rmerge | 0.087 | 0.434 |
| Number of reflections | 23274 | |
| <I/σ(I)> | 15.8 | |
| Completeness [%] | 97.0 | 98.5 |
| Redundancy | 3.9 | 3.9 |
Crystallization Conditions
| crystal ID | method | pH | temperature | details |
| 1 | VAPOR DIFFUSION, SITTING DROP | 6.5 | 295 | Crystals of the KcsAester-Fab complex grown in the presence of 300 mM KCl were washed 2X in a similar solution containing 0.3M CsCl, incubated overnight in the presence of 0.3M CsCl and then cryoprotected. 50 mM Magnesium acetate, PEG 400 (20-25%), pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 295K |
