6QT4

Radiation damage study on a 16mer DNA segment, structure at 17.7 MGy dose

Experimental procedure

Experimental method	SINGLE WAVELENGTH
Source type	SYNCHROTRON
Source details	DIAMOND BEAMLINE I24
Synchrotron site	Diamond
Beamline	I24
Temperature [K]	100
Detector technology	PIXEL
Collection date	2018-10-22
Detector	DECTRIS PILATUS3 6M
Wavelength(s)	0.9686
Spacegroup name	H 3 2
Unit cell lengths	36.926, 36.926, 162.362
Unit cell angles	90.00, 90.00, 120.00

Refinement procedure

Resolution	31.400 - 1.800
R-factor	0.2352
Rwork	0.232
R-free	0.31040
Structure solution method	FOURIER SYNTHESIS
Starting model (for MR)	6qt1
RMSD bond length	0.008
RMSD bond angle	1.710
Data reduction software	DIALS
Data scaling software	Aimless (0.7.3)
Phasing software	MOLREP
Refinement software	REFMAC (5.8.0238)

Data quality characteristics

	Overall	Inner shell	Outer shell
Low resolution limit [Å]	31.410	31.380	1.850
High resolution limit [Å]	1.800	7.840	1.800
Rmerge	0.081	0.035	4.463
Rmeas	0.099	0.043	5.447
Rpim	0.056	0.024	3.066
Number of reflections	3898	63	188
<I/σ(I)>	3.5
Completeness [%]	92.2	95.6	56.7
Redundancy	3	2.6	2.5
CC(1/2)	0.995	0.998	0.237

Crystallization Conditions

crystal ID	method	pH	temperature	details
1	VAPOR DIFFUSION, HANGING DROP	8.6	292	2 microliter 1.5 mM DNA solution (5mM HEPES pH 6.6) plus 2 microliter 10 mM HEPES pH 6.6 plus 4 microliter reservoir solution, against a reservoir of 1 ml 34% PEG200, 600 mM CaCl2 and 10 mM HEPES pH 8.6.