2HOO

Crystal structure of an E. coli thi-box riboswitch bound to benfotiamine

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6	295	growth: 29% PEG 2000, 0.2 M NH4Cl, 8 mM CaCl2, 0.2 mM Na2WO4, 50 mM cacodylate pH 6.0; 0.25 mM BzTP, 0.25 mM spermine, 1.5 mM MgCl2, 50 mM KCl; cryo: above with 15% w/v sucrose; 600 x 70 x 70 um xtal, VAPOR DIFFUSION, HANGING DROP, temperature 295K, pH 6.00

Crystal Properties
Matthews coefficient	Solvent content
2.09	41.09

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 61.4	α = 90
b = 61.4	β = 90
c = 102.9	γ = 120

Symmetry
Space Group	P 32 1 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			2006-02-01	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 5.0.2		ALS	5.0.2

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	3	30	98.1	0.107	19.1	7.5		4293

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)
	3	3.1	87.7		0.391	2.5	4.5

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Number Reflections (All)	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	3	30	4622	4293	450	92.9	0.212	0.212	0.275	RANDOM	80.6

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]

RMS Deviations
Key	Refinement Restraint Deviation
c_angle_deg	1.32
c_bond_d	0.007
c_bond_d_na
c_bond_d_prot
c_angle_d
c_angle_d_na
c_angle_d_prot
c_angle_deg_na
c_angle_deg_prot
c_dihedral_angle_d
c_dihedral_angle_d_na
c_dihedral_angle_d_prot
c_improper_angle_d
c_improper_angle_d_na
c_improper_angle_d_prot
c_mcbond_it
c_mcangle_it
c_scbond_it
c_scangle_it

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms
Nucleic Acid Atoms	1695
Solvent Atoms	3
Heterogen Atoms	38

Software

Software
Software Name	Purpose
HKL-2000	data collection
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
CNS	phasing