1GUJ
Insulin at pH 2: structural analysis of the conditions promoting insulin fibre formation.
Experimental procedure
| Experimental method | SINGLE WAVELENGTH |
| Source type | SYNCHROTRON |
| Source details | ESRF BEAMLINE ID14-1 |
| Synchrotron site | ESRF |
| Beamline | ID14-1 |
| Temperature [K] | 120 |
| Detector technology | CCD |
| Detector | MARRESEARCH |
| Spacegroup name | P 21 21 21 |
| Unit cell lengths | 44.046, 46.177, 51.194 |
| Unit cell angles | 90.00, 90.00, 90.00 |
Refinement procedure
| Resolution | 34.300 - 1.620 |
| R-factor | 0.172 |
| Rwork | 0.170 |
| R-free | 0.20700 |
| Structure solution method | MOLECULAR REPLACEMENT |
| Starting model (for MR) | 4ins |
| RMSD bond length | 0.013 |
| RMSD bond angle | 1.359 * |
| Data reduction software | DENZO |
| Data scaling software | SCALEPACK |
| Phasing software | AMoRE |
| Refinement software | REFMAC (5.0) |
Data quality characteristics
| Overall | Outer shell | |
| Low resolution limit [Å] | 20.000 | 1.660 |
| High resolution limit [Å] | 1.630 | 1.630 |
| Rmerge | 0.040 | 0.250 * |
| Number of reflections | 13079 | |
| <I/σ(I)> | 36 | 9 |
| Completeness [%] | 91.0 * | 76.5 * |
| Redundancy | 5.3 * | 5 |
Crystallization Conditions
| crystal ID | method | pH | temperature | details |
| 1 | VAPOR DIFFUSION, HANGING DROP | 2.1 | HANGING DROP VAPOUR DIFFUSION METHOD PROTEIN SOL: 5 MG/ML HUMAN INSULIN IN SULPHURIC ACID PH 2.1 RESERVOIR SOL: SULPHURIC ACID PH 2.1,0.025 M SODIUM SULPHATE |
Crystallization Reagents in Literatures
| ID | crystal ID | solution | reagent name | concentration (unit) | details |
| 1 | 1 | drop | insulin | 5 (mg/ml) | pH2.1 |
| 2 | 1 | reservoir | 0.025 (M) | pH2.1 |
