Experiment: 4FRN

Crystal structure of the cobalamin riboswitch regulatory element

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	4FRG

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	hanging drop	7	298	10% v/v MPD, 40 mM sodium cacodylate pH 7.0, 12 mM spermine tetrahydrochloride, 80 mM potassium chloride, 20 mM barium chloride, hanging drop, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.6	51.5

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 55.605	α = 90
b = 81.833	β = 90
c = 147.722	γ = 90

Symmetry
Space Group	P 21 21 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 315r		2011-02-05	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 8.2.2	1.60	ALS	8.2.2

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Sym 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	3.43	55.605	99.5	0.082	8.512	3.4		9466

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	3.43	3.62	99.5		0.298	0.298	2.6	3.5	1332

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	4FRG	3.43	54.83	9428	9428	450	99.01	0.252	0.252	0.251	0.2747	0.273	0.3085	RANDOM	101.287

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]
-24.257			-0.019		24.276

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms
Nucleic Acid Atoms	4364
Solvent Atoms
Heterogen Atoms	196

Software

Software
Software Name	Purpose
SCALA	data processing
PDB_EXTRACT	data extraction
XDS	data reduction
SCALA	data scaling
BUSTER	refinement