4NYC

Crystal structure of the E. coli thiM riboswitch in complex with thieno[2,3-b]pyrazin-7-amine

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.5	294	30% PEG2000, 0.5 M ammonium chloride, 50 mM Bis-Tris-HCl, pH 6.5, 10 mM manganese chloride, VAPOR DIFFUSION, HANGING DROP, temperature 294K

Crystal Properties
Matthews coefficient	Solvent content
2.32	47.07

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 65.122	α = 90
b = 65.122	β = 90
c = 101.975	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	ADSC QUANTUM 315r		2012-02-25	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 5.0.1	0.97741	ALS	5.0.1

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	3.15	30	100	0.111	8	10.7		4467

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	3.15	3.2	100			10.9	219

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	PDB ENTRY 2HOJ	3.15	30	4193	438	94.4	0.2019	0.2639	99.516

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]
13.798			13.798		-27.595

RMS Deviations
Key	Refinement Restraint Deviation
c_scangle_it	2.831
c_scbond_it	1.698
c_angle_d	1.194
c_bond_d	0.006
c_mcbond_it
c_mcangle_it

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms
Nucleic Acid Atoms	1647
Solvent Atoms	5
Heterogen Atoms	26

Software

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

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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 R01GM133198.