3P4G
X-ray crystal structure of a hyperactive, Ca2+-dependent, beta-helical antifreeze protein from an Antarctic bacterium
Experimental procedure
| Experimental method | SINGLE WAVELENGTH |
| Source type | SYNCHROTRON |
| Source details | NSLS BEAMLINE X6A |
| Synchrotron site | NSLS |
| Beamline | X6A |
| Temperature [K] | 100 |
| Detector technology | CCD |
| Collection date | 2009-06-12 |
| Detector | ADSC QUANTUM 270 |
| Wavelength(s) | 1.6 |
| Spacegroup name | P 1 |
| Unit cell lengths | 57.500, 70.780, 84.250 |
| Unit cell angles | 99.06, 92.30, 97.47 |
Refinement procedure
| Resolution | 34.600 - 1.700 |
| R-factor | 0.16547 |
| Rwork | 0.164 |
| R-free | 0.20022 |
| Structure solution method | MOLECULAR REPLACEMENT |
| RMSD bond length | 0.025 |
| RMSD bond angle | 1.933 |
| Data reduction software | HKL-2000 |
| Data scaling software | SCALA |
| Phasing software | SHELXS |
| Refinement software | REFMAC (5.5.0072) |
Data quality characteristics
| Overall | Outer shell | |
| Low resolution limit [Å] | 34.600 | 1.790 |
| High resolution limit [Å] | 1.700 | 1.700 |
| Rmerge | 0.088 | 0.461 |
| Number of reflections | 135568 | |
| <I/σ(I)> | 2.7 | |
| Completeness [%] | 94.9 | 89.4 |
| Redundancy | 3.9 |
Crystallization Conditions
| crystal ID | method | pH | temperature | details |
| 1 | VAPOR DIFFUSION, HANGING DROP | 9.5 | 298 | 10% PEG 8000, 400 mM MgAcetate, pH 9.5, VAPOR DIFFUSION, HANGING DROP, temperature 298K |
