1EAN

THE RUNX1 Runt domain at 1.70A resolution: A structural switch and specifically bound chloride ions modulate DNA binding

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1EAQ	PDB CODE 1EAQ

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6.5		30% MPEG 350, 5-10% PEG 3350, 70 MM NA CACODYLATE, PH 6.5

Crystal Properties
Matthews coefficient	Solvent content
4.46	72

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 110.696	α = 90
b = 110.696	β = 90
c = 117.293	γ = 120

Symmetry
Space Group	H 3 2

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	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID14-4		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	1.7	19.7	99.7	0.04	11.3	5.7		28866

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	1.7	1.74	99		0.58	1.5	4

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB CODE 1EAQ	1.7	20	28868	1519	99.7	0.204	0.21	0.222	0.23	RANDOM	21.44

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]
1.56	0.78		1.56		-2.34

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_3_deg	18.478
r_dihedral_angle_1_deg	5.017
r_scangle_it	1.854
r_angle_refined_deg	1.586
r_angle_other_deg	1.501
r_scbond_it	1.13
r_symmetry_hbond_refined	0.812
r_mcangle_it	0.809
r_mcbond_it	0.433
r_symmetry_vdw_other	0.217
r_nbd_refined	0.206
r_nbd_other	0.204
r_xyhbond_nbd_refined	0.141
r_symmetry_vdw_refined	0.113
r_chiral_restr	0.103
r_gen_planes_refined	0.002
r_bond_other_d	0.001
r_gen_planes_other	0.001
r_bond_refined_d
r_dihedral_angle_2_deg
r_dihedral_angle_4_deg
r_nbtor_refined
r_nbtor_other
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	875
Nucleic Acid Atoms
Solvent Atoms	119
Heterogen Atoms	2

Software

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