3KXB

Structural characterization of H3K56Q nucleosomes and nucleosomal arrays

Experimental procedure

Experimental method	SINGLE WAVELENGTH
Source type	ROTATING ANODE
Source details	RIGAKU RUH3R
Temperature [K]	100
Detector technology	IMAGE PLATE
Collection date	2007-10-17
Detector	RIGAKU RAXIS IV++
Wavelength(s)	1.54
Spacegroup name	P 21 21 21
Unit cell lengths	109.517, 105.670, 181.330
Unit cell angles	90.00, 90.00, 90.00

Refinement procedure

Resolution	20.000 - 3.200
R-factor	0.378
Rwork	0.283
R-free	0.29250
Structure solution method	MOLECULAR REPLACEMENT
Starting model (for MR)	PDBID 1AOI
Data reduction software	HKL-2000
Data scaling software	HKL-2000
Phasing software	CNS
Refinement software	CNS

Data quality characteristics

	Overall	Outer shell
Low resolution limit [Å]	20.000
High resolution limit [Å]	3.200	3.200
Rmerge	0.055
Number of reflections	35254
<I/σ(I)>	19.53
Completeness [%]	100.0	78
Redundancy	1.3

Crystallization Conditions

crystal ID	method	pH	temperature	details
1	VAPOR DIFFUSION	6	293	Crystals were grown by vapor diffusion in 8 20 days at 20 C using a droplet containing 4.0 mg ml−1 core particle 50 mM KCl, 70 75 mM MnCl , and 20 mM potassium cacodylate, pH 6.0, surrounded by silicon oil DC200 (110mPa s; Fluka) and equilibrated against 40 46 mM MnCl2, 35 40 mM KCl and 20 mM potassium cacodylate, pH 6.0, VAPOR DIFFUSION, temperature 293K