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 |