2B98

Crystal Structure of an archaeal pentameric riboflavin synthase

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7	298	0.1 M HEPES, pH 7.0, and 40% MPD., VAPOR DIFFUSION, HANGING DROP, temperature 298.0K

Crystal Properties
Matthews coefficient	Solvent content
2.22	44.62

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 41.773	α = 68.48
b = 72.692	β = 74.61
c = 72.698	γ = 74.9

Symmetry
Space Group	P 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	IMAGE PLATE	MARRESEARCH		2003-07-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU200	1.5418

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	2.3	50					32165

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	2.3	20	30444	1677	100	0.21131	0.21131	0.20773	0.27564	RANDOM	32.019

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]
-0.72	-0.16	-0.32	0.57	-1.27	1.34

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	5.35
r_scangle_it	1.948
r_scbond_it	1.245
r_angle_refined_deg	1.233
r_mcangle_it	0.758
r_mcbond_it	0.4
r_nbd_refined	0.224
r_symmetry_hbond_refined	0.195
r_xyhbond_nbd_refined	0.186
r_symmetry_vdw_refined	0.151
r_chiral_restr	0.078
r_bond_refined_d	0.01
r_gen_planes_refined	0.003

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	5695
Nucleic Acid Atoms
Solvent Atoms	294
Heterogen Atoms

Software

Software
Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling
MOLREP	phasing