3MGR

Binding of Rubidium ions to the Nucleosome Core Particle

X-RAY DIFFRACTION

---

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
2.69	54.34

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 106.462	α = 90
b = 109.681	β = 90
c = 182.213	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	0.81	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	2.3	94.07	90.3	0.05	21.1	6.7	85891	84087			44.1

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	2.3	2.42	58.6		0.478	3.2	4.6	7966

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	2.3	60	84087	1740	90.04	0.24242	0.24191	0.26735	RANDOM	60.23

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]
0.93			-3.12		2.19

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	32.11
r_dihedral_angle_4_deg	20.759
r_dihedral_angle_3_deg	15.624
r_dihedral_angle_1_deg	5.735
r_scangle_it	2.223
r_angle_refined_deg	1.472
r_mcangle_it	1.449
r_scbond_it	1.307
r_mcbond_it	0.839
r_nbtor_refined	0.303
r_symmetry_vdw_refined	0.204
r_nbd_refined	0.188
r_xyhbond_nbd_refined	0.139
r_symmetry_hbond_refined	0.092
r_chiral_restr	0.077
r_bond_refined_d	0.01
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	23

Software

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