3NPN
Structure of the s-adenosylhomocysteine riboswitch at 3.0A
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 | 2009-06-03 |
Detector | ADSC QUANTUM 315 |
Wavelength(s) | 1.1051 |
Spacegroup name | H 3 2 |
Unit cell lengths | 105.360, 105.360, 107.780 |
Unit cell angles | 90.00, 90.00, 120.00 |
Refinement procedure
Resolution | 29.059 - 2.792 |
R-factor | 0.256 |
Rwork | 0.252 |
R-free | 0.29200 |
Structure solution method | SAD |
RMSD bond length | 0.005 |
RMSD bond angle | 0.970 |
Data reduction software | DENZO |
Data scaling software | SCALA (3.3.12) |
Phasing software | PHASER |
Refinement software | REFMAC (refmac_5.5.0102) |
Data quality characteristics
Overall | Inner shell | Outer shell | |
Low resolution limit [Å] | 29.059 | 29.680 | 2.940 |
High resolution limit [Å] | 2.775 | 8.830 | 2.775 |
Rmerge | 0.010 | 0.010 | |
Total number of observations | 1048 | 4868 | |
Number of reflections | 5854 | ||
<I/σ(I)> | 4.058 | 11 | 0.7 |
Completeness [%] | 99.8 | 94.9 | 99.9 |
Redundancy | 5.6 | 5.4 | 5.7 |
Crystallization Conditions
crystal ID | method | pH | temperature | details |
1 | hanging drop | 7 | 298 | 2.25 mM Spermine, 9 mM magnesium chloride, 0.9 mM spermidine, 1.8 mM Cobalt(III)hexammine chloride, 0.05 M sodium cacodylate pH 7.0, 5% (v/v) PEG 400, 20 mM iridium (III) hexammine chloride, hanging drop, temperature 298K |