4E48

Structure of 20mer double-helical RNA composed of CUG/CUG-repeats

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	4	291	1.6 mM ammonium sulfate, 0.1 M citric acid, pH 4.0, VAPOR DIFFUSION, HANGING DROP, temperature 291K

Crystal Properties
Matthews coefficient	Solvent content
2.29	46.29

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 43.642	α = 90
b = 43.642	β = 90
c = 158.556	γ = 120

Symmetry
Space Group	P 3 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	IMAGE PLATE	MAR scanner 345 mm plate		2008-03-17	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	Cu FINE FOCUS	1.54

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	2.5	20	98.3	0.103	11.1	6.6	6607	6468	2	2

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)
1	2.5	2.59	92.4		0.476	2.3	3.3	175

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	2.5	15	6442	307	98.29	0.2067	0.2033	0.2793	RANDOM	24.9698

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]
0.78	0.39		0.78		-1.17

RMS Deviations
Key	Refinement Restraint Deviation
r_angle_refined_deg	1.553
r_scangle_it	1.341
r_angle_other_deg	1.015
r_scbond_it	0.908
r_symmetry_vdw_other	0.277
r_nbd_other	0.23
r_nbtor_refined	0.225
r_symmetry_vdw_refined	0.224
r_symmetry_hbond_refined	0.164
r_xyhbond_nbd_refined	0.163
r_nbd_refined	0.124
r_nbtor_other	0.066
r_chiral_restr	0.05
r_bond_refined_d	0.007
r_gen_planes_refined	0.004
r_bond_other_d	0.003
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms
Nucleic Acid Atoms	1266
Solvent Atoms	94
Heterogen Atoms	27

Software

Software
Software Name	Purpose
REFMAC	refinement
PDB_EXTRACT	data extraction
PROTEUM PLUS	data collection
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing