1XJJ

Structural mechanism of allosteric substrate specificity in a ribonucleotide reductase: dGTP complex

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1XJE	PDB entry 1XJE

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	4.5	293	PEG8000, sodium acetate, sodium chloride, dithiotreithol, pH 4.5, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.63	55

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 118.07	α = 90
b = 123.88	β = 103.7
c = 106.3	γ = 90

Symmetry
Space Group	C 1 2 1

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		2003-09-20	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	MAX II BEAMLINE I711	0.964	MAX II	I711

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	1.86	42	99.8	0.066	12.2	5.2	124318	124131

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	1.86	2	100		0.4	3.4	4.2

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	PDB entry 1XJE	1.86	42.26	117911	6217	99.89	0.1985	0.19624	0.24066	RANDOM	32.72

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]
1.38		1.15	-0.01		-0.83

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.765
r_dihedral_angle_4_deg	18.569
r_dihedral_angle_3_deg	17.267
r_dihedral_angle_1_deg	6.784
r_scangle_it	4.281
r_scbond_it	2.849
r_mcangle_it	1.882
r_angle_refined_deg	1.799
r_mcbond_it	1.169
r_nbtor_refined	0.315
r_nbd_refined	0.215
r_symmetry_hbond_refined	0.201
r_symmetry_vdw_refined	0.165
r_xyhbond_nbd_refined	0.155
r_metal_ion_refined	0.154
r_chiral_restr	0.128
r_bond_refined_d	0.018
r_gen_planes_refined	0.008
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_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	9915
Nucleic Acid Atoms
Solvent Atoms	550
Heterogen Atoms	126

Software

Software
Software Name	Purpose
REFMAC	refinement
MAR345	data collection
XDS	data scaling