2XAX

Ribonucleotide reductase Y730NO2Y and Y731A modified R1 subunit of E. coli

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2X0X	PDB ENTRY 2X0X

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6		LITHIUM SULPHATE 1.5M, SODIUM CHLORIDE BUFFER PH 6.

Crystal Properties
Matthews coefficient	Solvent content
3.17	54

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 224.863	α = 90
b = 224.863	β = 90
c = 336.401	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	MARRESEARCH		2009-03-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID23-2		ESRF	ID23-2

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	2.75	84.21	89.5	0.18	9.83	5.61		75336		-3.7

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	2.75	2.77	87		0.49	1.68	5.34

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	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	PDB ENTRY 2X0X	2.75	169.031	2	75336	3778	88.912	0.186	0.1816	0.261	RANDOM	40.101

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]
0.668	0.334		0.668		-1.002

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	39.149
r_dihedral_angle_4_deg	21.548
r_dihedral_angle_3_deg	20.471
r_dihedral_angle_1_deg	7.139
r_scangle_it	3.099
r_scbond_it	1.874
r_angle_refined_deg	1.686
r_mcangle_it	1.366
r_mcbond_it	0.763
r_nbtor_refined	0.318
r_symmetry_hbond_refined	0.278
r_nbd_refined	0.25
r_symmetry_vdw_refined	0.217
r_xyhbond_nbd_refined	0.192
r_chiral_restr	0.114
r_bond_refined_d	0.016
r_gen_planes_refined	0.005
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_other
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_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	17802
Nucleic Acid Atoms
Solvent Atoms	629
Heterogen Atoms

Software

Software
Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
TRUNCATE	data scaling