3V7E

Crystal structure of YbxF bound to the SAM-I riboswitch aptamer

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1SDS	M. jannaschii L7Ae protein (PDB ID 1SDS, chain A)

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6	294.15	150 M RNA, 210 M YbxF, 10 mM MgCl2, 10 mM SAM, 40 mM KCl, 20 mM HEPES-KOH, 1 mM spermine, 1 mM cobalt hexammine, and 1 mM DTT, 100 mM potassium cacodylate pH 6.0, 200 mM MgCl2 and 25% (v/v) PEG400, VAPOR DIFFUSION, HANGING DROP, temperature 294.15K

Crystal Properties
Matthews coefficient	Solvent content
2.52	51.14

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 191.762	α = 90
b = 54.305	β = 116.56
c = 106.366	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	ADSC QUANTUM 315r		2011-05-09	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 5.0.2	1	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	2.8	50		0.098	25.2	4.3	25202	22926		116.2	121.2

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	2.8	2.9	92.7		2.46	4.3	2244

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	M. jannaschii L7Ae protein (PDB ID 1SDS, chain A)	2.8	29.54	22926	2276	93.4	0.218	0.218	0.274	RANDOM	75.6

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]
25.12		15.88	7.19		-32.32

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	18.5
c_scangle_it	6.87
c_mcangle_it	5.58
c_scbond_it	4.99
c_mcbond_it	3.52
c_improper_angle_d	1.73
c_angle_deg	1.4
c_bond_d	0.006
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_na
c_dihedral_angle_d_prot
c_improper_angle_d_na
c_improper_angle_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	962
Nucleic Acid Atoms	5372
Solvent Atoms	15
Heterogen Atoms	202

Software

Software
Software Name	Purpose
ALS	data collection
PHASER	phasing
CNS	refinement
HKL-2000	data reduction
HKL-2000	data scaling