ISDA

X-RAY DIFFRACTION

Crystallization Details

Method	pH	Temprature	Details
X-RAY DIFFRACTION	7.5	293	Racemic DNA mixture, HEPES, calcium chloride, PEG400 For crystallization, we used four strands 1) d(CGCTATAATGCG) with L-sugars 2) d(CGCATTATAGCG) with L-sugars and 3) d(CGCTATAATGCG) with D-sugars 4) d(CGCATTATAGCG) with D-sugars Enantio-pure DNA solutions were prepared first by de-naturation followed by slow cooling down process to ensure proper folding of the hetero-duplex formed between the non-self complementary strands. After slow-annealing, the enantiopure solutions were mixed in equimolar ratio and this racemic DNA mixture was used for crystallization.

Unit Cell:

a: 41.736 Å b: 39.329 Å c: 65.713 Å α: 90.00° β: 90.00° γ: 90.00°

Symmetry:

Space Group: P b c a

Crystal Properties:

Matthew's Coefficient: 1.85 Solvent Content: 55

Refinement Statistics

Diffraction ID	Structure Solution Method	Cross Validation Method	Resolution Limit (High)	Resolution Limit (Low)	Number of Reflections (Observed)	Number of Reflections (R-free)	Percent Reflections (Observed)	R-Work	R-Free	Mean Isotropic
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	1.650	32.856	12548	611	99.86	0.2973	0.3167	?

Data Collection

Overall

Resolution Limit (High)	Resolution Limit (Low)	Percent Possible (Observed)	R Merge I (Observed)	R Sym I (Observed)	Net I Over Average Sigma (I)	Redundancy	Number Reflections (All)	Number Reflections (Observed)	Observed Criterion Sigma (F)	Observed Criterion Sigma (I)	B (Isotropic) From Wilson Plot
1.65	32.86	99.86	0.019	?	16.92	1.9	?	12549	?	?	?

Highest Resolution Shell

#	Resolution Limits (Low)	Resolution Limits (High)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.65	1.79	99.76	?	?	2.75	1.9	?

Diffraction

Diffraction experiment

Crystal ID	Scattering Type	Data Collection Temprature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1		100 K			?

Radiation Source

Source	Type	Wavelength List	Synchrotron Site	Beamline
SYNCHROTRON	SOLEIL BEAMLINE PROXIMA 1	0.9785	SOLEIL	PROXIMA 1

Software