1S7G
Structural Basis for the Mechanism and Regulation of Sir2 Enzymes
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 | 2003-04-16 |
| Detector | ADSC QUANTUM 4 |
| Wavelength(s) | 1.099997 |
| Spacegroup name | P 21 21 2 |
| Unit cell lengths | 104.850, 181.574, 78.921 |
| Unit cell angles | 90.00, 90.00, 90.00 |
Refinement procedure
| Resolution | 30.000 * - 2.300 |
| R-factor | 0.207 |
| Rwork | 0.207 |
| R-free | 0.25000 * |
| Structure solution method | MOLECULAR REPLACEMENT |
| Starting model (for MR) | 1ma3 |
| RMSD bond length | 0.009 |
| RMSD bond angle | 1.320 * |
| 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] | 500.000 | 2.380 |
| High resolution limit [Å] | 2.300 | 2.300 |
| Rmerge | 0.109 * | 0.462 * |
| Total number of observations | 650116 * | |
| Number of reflections | 67550 | 6662 * |
| <I/σ(I)> | 15.5 | 4.5 |
| Completeness [%] | 99.7 | 99 |
| Redundancy | 9.6 | 8.8 |
Crystallization Conditions
| crystal ID | method | pH | temperature | details |
| 1 | VAPOR DIFFUSION, HANGING DROP | 7.4 | 20 * | ammonium sulfate, PEG400, hepes, pH 7.4, VAPOR DIFFUSION, HANGING DROP, temperature 293K |
Crystallization Reagents in Literatures
| ID | crystal ID | solution | reagent name | concentration (unit) | details |
| 1 | 1 | drop | HEPES | 10 (mM) | pH7.4 |
| 2 | 1 | drop | TCEP | 1 (mM) | |
| 3 | 1 | drop | protein | 20 (mg/ml) | |
| 4 | 1 | reservoir | HEPES | 0.1 (M) | pH7.4 |
| 5 | 1 | reservoir | ammonium sulfate | 1.8 (M) | |
| 6 | 1 | reservoir | PEG400 | 1 (%) |
