1H0N

Cobalt substitution of mouse R2 ribonucleotide reductase to model the reactive diferrous state

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1XSM	PDB ENTRY 1XSM

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6		0.1 M NA-ACETATE BUFFER PH4.7, 1.2 M NACL, 7.5 MG/ML APO-R2 PROTEIN. CRYSTALS WERE SOAKED IN 5 MM CO2+ SOLUTION, PH INCREASED TO 6

Crystal Properties
Matthews coefficient	Solvent content
2.03	39.47

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 75.1	α = 90
b = 106.86	β = 90
c = 91.46	γ = 90

Symmetry
Space Group	C 2 2 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	MARRESEARCH		2001-04-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID14-3		ESRF	ID14-3

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	2.37	30	99.9	0.075	9.6	2.4		18915			25.5

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	2.37	2.48	99		0.41	3.71

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 (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 1XSM	2.4	8	14006	691	97.9	0.218	0.218	0.22	0.297	0.3	RANDOM	38.5

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]
4.44			1.85		-6.3

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	21.8
c_scangle_it	3.07
c_mcangle_it	2.38
c_angle_deg	2.1
c_scbond_it	2.05
c_mcbond_it	1.44
c_improper_angle_d	1.42
c_bond_d	0.024
c_bond_d_na
c_bond_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2380
Nucleic Acid Atoms
Solvent Atoms	112
Heterogen Atoms	2

Software

Software
Software Name	Purpose
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
CNS	phasing

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.