3QK4

Crystal structure of d(CGCGGGTACCCGCG)2 as A-DNA duplex

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
in silico model	Other		A-DNA fiber Model

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.99	300	The drop consist of 1mM DNA, 50mM buffer, 10mM BaCl2, 1mM Spermine equilibriated against 50% MPD, pH 6.99, VAPOR DIFFUSION, HANGING DROP, temperature 300K

Crystal Properties
Matthews coefficient	Solvent content
2.15	42.79

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 28.988	α = 90
b = 28.988	β = 90
c = 87.662	γ = 90

Symmetry
Space Group	P 43

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	IMAGE PLATE	MARRESEARCH	mirrors	2008-12-17	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	BRUKER AXS MICROSTAR	1.54179

Data Collection

Overall
ID #	Resolution (High)	Resolution (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	2.6	20	96.2	0.077	0.0714	4.5	3.67	2256	2171	1	1	57.76

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.6	2.69	95.4		0.4184	0.3936	1.2	3.71

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	A-DNA fiber Model	2.6	19.96	2168	2042	126	97.18	0.24734	0.2458	0.2744	RANDOM	43.531

Temperature Factor Modeling
Anisotropic B[1][1]	Anisotropic B[1][2]	Anisotropic B[1][3]	Anisotropic B[2][2]	Anisotropic B[2][3]	Anisotropic B[3][3]
18.22			18.22		-36.44

RMS Deviations
Key	Refinement Restraint Deviation
r_angle_refined_deg	3.975
r_chiral_restr	0.152
r_bond_refined_d	0.023
r_gen_planes_refined	0.01
r_bond_other_d
r_angle_other_deg
r_dihedral_angle_1_deg
r_dihedral_angle_2_deg
r_dihedral_angle_3_deg
r_dihedral_angle_4_deg
r_gen_planes_other
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_it
r_mcbond_other
r_mcangle_it
r_scbond_it
r_scangle_it
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms
Nucleic Acid Atoms	568
Solvent Atoms	46
Heterogen Atoms

Software

Software
Software Name	Purpose
MAR345dtb	data collection
AMoRE	phasing
REFMAC	refinement
AUTOMAR	data reduction