2HVK
crystal structure of the KcsA-Fab-TBA complex in high K+
Experimental procedure
Experimental method | SINGLE WAVELENGTH |
Source type | SYNCHROTRON |
Source details | NSLS BEAMLINE X29A |
Synchrotron site | NSLS |
Beamline | X29A |
Temperature [K] | 100 |
Detector technology | CCD |
Collection date | 2006-05-07 |
Detector | ADSC QUANTUM 315 |
Wavelength(s) | 1.1 |
Spacegroup name | I 4 |
Unit cell lengths | 155.874, 155.874, 76.159 |
Unit cell angles | 90.00, 90.00, 90.00 |
Refinement procedure
Resolution | 27.000 - 1.900 |
R-factor | 0.228 |
Rwork | 0.228 |
R-free | 0.24500 |
Structure solution method | MOLECULAR REPLACEMENT |
Starting model (for MR) | 1k4c |
RMSD bond length | 0.006 |
RMSD bond angle | 1.300 |
Data reduction software | DENZO |
Data scaling software | SCALEPACK |
Phasing software | CNS |
Refinement software | CNS (1.1) |
Data quality characteristics
Overall | Outer shell | |
Low resolution limit [Å] | 30.000 | 1.970 |
High resolution limit [Å] | 1.900 | 1.900 |
Rmerge | 0.058 | 0.413 |
Number of reflections | 71466 | |
<I/σ(I)> | 16.7 | |
Completeness [%] | 99.2 | 92.8 |
Redundancy | 6.5 | 4.1 |
Crystallization Conditions
crystal ID | method | pH | temperature | details |
1 | VAPOR DIFFUSION | 6.5 | 293 | 18-25% PEG 400, 50mM Mg(Ac)2, 50mM NaAc (pH5) or Na Cacodylate (pH6) or Hepes (PH 7), pH 6.5, VAPOR DIFFUSION, temperature 293K |