1EAQ

The RUNX1 Runt domain at 1.25A resolution: A structural switch and specifically bound chloride ions modulate DNA binding

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6.4		25 % PEG 3350, 16% GLYCEROL, 130 MM NA CACODYLATE, PH 6.4

Crystal Properties
Matthews coefficient	Solvent content
2.2	34

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 91.3	α = 90
b = 46.4	β = 92.3
c = 63	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	ADSC CCD	MIRROR	1999-06-06	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID14-4	0.9315,0.9793,0.9795	ESRF	ID14-4

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	1.25	37	97.7	0.06	18.3	8.48		71531

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	1.25	1.27	78		0.245	2	1.5

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	MAD	THROUGHOUT	1.25	25	70348	1047	97.9	0.149	0.149	0.167	RANDOM	16.45

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]
0.23		0.22	0.55		-0.76

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	6.144
r_scangle_it	5.405
r_scbond_it	3.818
r_mcangle_it	3.242
r_angle_other_deg	2.514
r_mcbond_it	2.196
r_angle_refined_deg	2.09
r_symmetry_vdw_refined	0.338
r_symmetry_vdw_other	0.334
r_nbd_other	0.276
r_nbd_refined	0.239
r_xyhbond_nbd_refined	0.185
r_chiral_restr	0.149
r_symmetry_hbond_refined	0.127
r_nbtor_other	0.095
r_bond_refined_d	0.024
r_gen_planes_refined	0.005
r_bond_other_d	0.002
r_gen_planes_other	0.001
r_dihedral_angle_2_deg
r_dihedral_angle_3_deg
r_dihedral_angle_4_deg
r_nbtor_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_mcangle_other
r_scbond_other
r_scangle_other
r_long_range_B_refined
r_long_range_B_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1911
Nucleic Acid Atoms
Solvent Atoms	359
Heterogen Atoms	4

Software

Software
Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
SCALEPACK	data scaling
SOLVE	phasing