1Q6F
Crystal Structure of Soybean Beta-Amylase Mutant (E178Y) with Increased pH Optimum at pH 7.1
Experimental procedure
| Experimental method | SINGLE WAVELENGTH |
| Source type | ROTATING ANODE |
| Source details | MACSCIENCE |
| Temperature [K] | 293 |
| Detector technology | AREA DETECTOR |
| Collection date | 1999-01-31 |
| Detector | SIEMENS HI-STAR |
| Wavelength(s) | 1.5418 |
| Spacegroup name | P 31 2 1 |
| Unit cell lengths | 86.818, 86.818, 145.240 |
| Unit cell angles | 90.00, 90.00, 120.00 |
Refinement procedure
| Resolution | 15.000 - 2.100 |
| R-factor | 0.171 |
| Rwork | 0.171 |
| R-free | 0.20900 * |
| Structure solution method | MOLECULAR REPLACEMENT |
| RMSD bond length | 0.006 |
| RMSD bond angle | 1.250 * |
| Data reduction software | SAINT |
| Data scaling software | SAINT |
| Phasing software | CNS |
| Refinement software | CNS (1.0) |
Data quality characteristics
| Overall | Outer shell | |
| Low resolution limit [Å] | 40.650 | 2.060 |
| High resolution limit [Å] | 1.990 | 1.990 |
| Rmerge | 0.084 * | 0.593 * |
| Total number of observations | 203117 * | |
| Number of reflections | 39656 | 2499 * |
| Completeness [%] | 89.4 | 55.9 |
Crystallization Conditions
| crystal ID | method | pH | temperature | details |
| 1 | VAPOR DIFFUSION, HANGING DROP | 5.4 * | 4 * | ammonium sulfate, pH 7.1, VAPOR DIFFUSION, HANGING DROP, temperature 277K |
Crystallization Reagents in Literatures
| ID | crystal ID | solution | reagent name | concentration (unit) | details |
| 1 | 1 | drop | protein | 24 (mg/ml) | |
| 2 | 1 | drop | sodium acetate | 0.1 (M) | pH5.4 |
| 3 | 1 | reservoir | ammonium sulfate | 48 (%) | |
| 4 | 1 | reservoir | sodium acetate | 0.1 (M) | |
| 5 | 1 | reservoir | EDTA | 1 (mM) | |
| 6 | 1 | reservoir | 2-mercaptoethanol | 18 (mM) | pH5.4 |
