4FRG

Crystal structure of the cobalamin riboswitch aptamer domain

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	hanging drop	7	298	100 mM magnesium acetate, 10% 2-methyl-1,3-propanediol, 5 mM iridium hexammine, pH 7.0, hanging drop, temperature 298K
2	hanging drop	7	298	100 mM magnesium acetate, 10% 2-methyl-1,3-propanediol, 5 mM iridium hexammine, pH 7.0, hanging drop, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
3.7	66.5
3.7	66.5

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 142.03	α = 90
b = 142.03	β = 90
c = 137.9	γ = 120

Symmetry
Space Group	P 64 2 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 315		2010-12-12	M	MAD
2	2

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 5.0.2	1.1051, 1.6	ALS	5.0.2
2				ALS	5.0.2

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	2.95	137.899	99.9	0.098	20.6	13.7	17854	17854

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	2.95	3.11	100		0.014	1.406	0.5	14.2	2536

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 (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MAD	THROUGHOUT	2.95	43.06	18377	17822	910	99.92	0.2397	0.2397	0.2393	0.2491	RANDOM	103.2693

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
t_other_torsion	21.89
t_angle_deg	0.64
t_bond_d	0.008
t_dihedral_angle_d
t_trig_c_planes
t_gen_planes
t_it
t_nbd
t_improper_torsion
t_pseud_angle
t_chiral_improper_torsion
t_sum_occupancies
t_utility_distance
t_utility_angle
t_utility_torsion
t_ideal_dist_contact
t_omega_torsion

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms
Nucleic Acid Atoms	3600
Solvent Atoms
Heterogen Atoms	217

Software

Software
Software Name	Purpose
SCALA	data scaling
SHARP	phasing
SOLOMON	phasing
BUSTER-TNT	refinement
PDB_EXTRACT	data extraction
BOS	data collection
XDS	data reduction
BUSTER	refinement