3MGS

Binding of Cesium ions to the Nucleosome Core particle

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION	6	291	85mM MnCl2, 60mM KCl, 40mM K-cacodylate , pH 6.0, VAPOR DIFFUSION, temperature 291K

Crystal Properties
Matthews coefficient	Solvent content
2.7	54.46

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 106.51	α = 90
b = 109.668	β = 90
c = 182.609	γ = 90

Symmetry
Space Group	P 21 21 21

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 225 mm CCD	vertically collimating mirror	2009-06-22	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SLS BEAMLINE X06DA	1.93	SLS	X06DA

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	3.15	94.07	99.8	0.091	17.8	7	37672	36839			75.4

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)
	3.15	3.32	98.5		0.477	3.1	5.7	5343

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-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	1KX5	3.15	94.07	36839	774	99.71	0.21635	0.21591	0.23756	RANDOM	75.97

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]
1.4			-6.24		4.84

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	32.962
r_dihedral_angle_4_deg	20.451
r_dihedral_angle_3_deg	16.6
r_dihedral_angle_1_deg	5.037
r_scangle_it	1.948
r_angle_refined_deg	1.46
r_mcangle_it	1.167
r_scbond_it	1.058
r_mcbond_it	0.654
r_nbtor_refined	0.316
r_nbd_refined	0.207
r_symmetry_vdw_refined	0.186
r_xyhbond_nbd_refined	0.153
r_symmetry_hbond_refined	0.137
r_chiral_restr	0.072
r_bond_refined_d	0.009
r_gen_planes_refined	0.004

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6156
Nucleic Acid Atoms	6021
Solvent Atoms
Heterogen Atoms	30

Software

Software
Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling
REFMAC	phasing