1A7W

CRYSTAL STRUCTURE OF THE HISTONE HMFB FROM METHANOTHERMUS FERVIDUS

X-RAY DIFFRACTION

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Crystallization

Crystal Properties
Matthews coefficient	Solvent content
2.5	51

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 31.3	α = 90
b = 61.58	β = 90
c = 39.65	γ = 90

Symmetry
Space Group	P 21 21 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	293	IMAGE PLATE	MAR scanner 300 mm plate	SUPPER NI-COATED MIRROR SYSTEM	1995-02-19	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RUH2R

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	R Sym 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	1.9	39.1	95.9	0.053	0.053	8.3	4.1		6152			22.87

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.9	1.97	97.2		0.196	0.196	3.7	3.4

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-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	AFTER RIGID BODY REFINEMENT	PARTIALLY REFINED ORTHORHOMBIC HMFA	1.55	18	10797	520	97.4	0.2	0.198	0.248	RANDOM	25.34

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]
1.398	1.398			-2.69

RMS Deviations
Key	Refinement Restraint Deviation
p_staggered_tor	17.7
p_scangle_it	5.241
p_transverse_tor	4.5
p_planar_tor	3.9
p_scbond_it	3.426
p_mcangle_it	2.676
p_mcbond_it	1.932
p_multtor_nbd	0.3
p_xhyhbond_nbd	0.3
p_xyhbond_nbd	0.3
p_singtor_nbd	0.178
p_chiral_restr	0.161
p_planar_d	0.047
p_angle_d	0.039
p_plane_restr	0.0242
p_bond_d	0.022
p_angle_deg
p_hb_or_metal_coord
p_orthonormal_tor
p_special_tor

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	527
Nucleic Acid Atoms
Solvent Atoms	46
Heterogen Atoms	2

Software

Software
Software Name	Purpose
AMoRE	phasing
REFMAC	refinement
DENZO	data reduction
CCP4	data scaling
SCALA	data scaling