3I5E

Allosteric Modulation of DNA by Small Molecules

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.5	277.15	21% 2-methyl-2,4-pentanediol (MPD), 35 mM calcium acetate, 10 mM Tris pH 7.5 equilibrated in sitting drops against a reservoir of 35% MPD at 4 C., VAPOR DIFFUSION, SITTING DROP, temperature 277.15K

Crystal Properties
Matthews coefficient	Solvent content
2.04	39.83

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 31.827	α = 90
b = 25.636	β = 116.72
c = 34.173	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	MARMOSAIC 325 mm CCD			M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL11-1	0.999	SSRL	BL11-1

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	0.98	15.91		0.05	18.7	2.5		14260

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)
	0.98	2.63	84.8		0.075	8.3	1.4

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	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	AB INITIO PHASING	THROUGHOUT	0.98	15.91	12125	631	89.45	0.11027	0.10849	0.14369	RANDOM	6.245

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]
0.02		0.02	-0.01

RMS Deviations
Key	Refinement Restraint Deviation
r_sphericity_free	13.357
r_sphericity_bonded	4.256
r_scangle_it	3.525
r_angle_refined_deg	3.444
r_scbond_it	2.932
r_rigid_bond_restr	1.992
r_angle_other_deg	1.543
r_nbd_refined	0.544
r_symmetry_vdw_other	0.413
r_symmetry_hbond_refined	0.385
r_xyhbond_nbd_refined	0.361
r_symmetry_vdw_refined	0.272
r_nbd_other	0.261
r_nbtor_refined	0.254
r_chiral_restr	0.15
r_nbtor_other	0.111
r_gen_planes_refined	0.046
r_bond_refined_d	0.033
r_bond_other_d	0.004
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms
Nucleic Acid Atoms	297
Solvent Atoms	137
Heterogen Atoms	3

Software

Software
Software Name	Purpose
SHELX	model building
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling
SHELX	phasing