1NVY

Strontium bound to the Holliday junction sequence d(TCGGTACCGA)4

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7	290	SrCl2, MPD, NaCacodylate , pH 7.0, VAPOR DIFFUSION, SITTING DROP, temperature 290K

Crystal Properties
Matthews coefficient	Solvent content
2.18	43.54

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 63.734	α = 90
b = 25.32	β = 110.11
c = 36.493	γ = 90

Symmetry
Space Group	C 1 2 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	CCD	MARRESEARCH		2002-05-15	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	EMBL/DESY, HAMBURG BEAMLINE BW7A	0.9470, 0.7301, 0.7667, 0.7670	EMBL/DESY, HAMBURG	BW7A

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge 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	1.5	20	99.2	0.075	13.58	1.9	16734	16734	1	1	20.89

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	1.5	1.58	99.2		0.228	4.38	1.88	2509

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	MAD	THROUGHOUT	1.5	34.3	8443	8443	433	98.92	0.20962	0.2069	0.26294	RANDOM	17.039

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]
-1.26		-0.41	1.15		-0.18

RMS Deviations
Key	Refinement Restraint Deviation
r_sphericity_free	6.942
r_sphericity_bonded	5.738
r_scangle_it	3.807
r_scbond_it	2.883
r_angle_refined_deg	2.442
r_rigid_bond_restr	2.042
r_angle_other_deg	1.707
r_symmetry_vdw_other	0.351
r_nbd_other	0.228
r_xyhbond_nbd_refined	0.163
r_nbd_refined	0.13
r_metal_ion_refined	0.107
r_nbtor_other	0.102
r_chiral_restr	0.097
r_symmetry_vdw_refined	0.086
r_symmetry_hbond_refined	0.076
r_gen_planes_refined	0.022
r_bond_refined_d	0.019
r_bond_other_d	0.002
r_gen_planes_other	0.001
r_dihedral_angle_1_deg
r_dihedral_angle_2_deg
r_xyhbond_nbd_other
r_symmetry_hbond_other
r_mcbond_it
r_mcangle_it

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms
Nucleic Acid Atoms	404
Solvent Atoms	107
Heterogen Atoms	5

Software

Software
Software Name	Purpose
REFMAC	refinement
XDS	data reduction
XDS	data scaling
SOLVE	phasing