5K9G

Crystal Structure of GTP Cyclohydrolase-IB with Tris

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8	298	(PEG 6000, 10-16%), LiCl (1-1.4 M), Tris (50 mM, pH 9.0) and Tris-Cl (50 mM, pH 7.0). Enzym sample prepared at 10 mg/mL in 50 mM Tris-HCl, 50 mM KCl, 1 mM DTT, pH 8.0

Crystal Properties
Matthews coefficient	Solvent content
2.3	46.45

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 92.707	α = 90
b = 100.557	β = 90
c = 114.017	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	ADSC QUANTUM 315		2008-06-24	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL7-1	0.97670	SSRL	BL7-1

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	1.9	68.16	99.2	0.047	36.17	4.5		41832

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	1.9	1.93			0.355	2.05

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	3D1T	1.9	68.16	39731	2068	99.12	0.17537	0.17305	0.22079	RANDOM	42.031

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]
-2.33			0.62		1.7

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	37.559
r_dihedral_angle_4_deg	23.702
r_dihedral_angle_3_deg	15.484
r_long_range_B_refined	8.019
r_dihedral_angle_1_deg	6.963
r_scbond_it	4.786
r_mcangle_it	4.416
r_mcbond_it	3.698
r_angle_refined_deg	1.992
r_chiral_restr	0.173
r_bond_refined_d	0.02
r_gen_planes_refined	0.009
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
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_it
r_scangle_other
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	3841
Nucleic Acid Atoms
Solvent Atoms	383
Heterogen Atoms	45

Software

Software
Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling
REFMAC	phasing