Experiment: 3ND4

Watson-Crick 16-mer dsRNA

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.5	298	15 mM MgCl2, 10 mM Spermine, 2M lithium sulfate, pH 6.5, vapor diffusion, hanging drop, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
1.98	37.79

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 41.094	α = 90
b = 41.094	β = 90
c = 123.69	γ = 120

Symmetry
Space Group	H 3 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	IMAGE PLATE	RIGAKU RAXIS IV	Varimax-HF confocal optical system	2008-11-28	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RUH3R	1.5418

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	1.524	18.39	99.5	0.041	26	7.3	6419	6419

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	1.52	1.61	97.1		0.158	0.158	4.7	4.6	881

Refinement

Statistics
Diffraction ID	Structure Solution Method	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	1.524	18.39	1.37	6412	642	99.41	0.176	0.172	0.1663	0.214	0.213	17.26

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]
0.031			0.031		-0.062

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	12.291
f_angle_d	1.614
f_chiral_restr	0.074
f_plane_restr	0.021
f_bond_d	0.018

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms
Nucleic Acid Atoms	336
Solvent Atoms	95
Heterogen Atoms	3

Software

Software
Software Name	Purpose
SCALA	data scaling
MOLREP	phasing
PHENIX	refinement
PDB_EXTRACT	data extraction
XSCALE	data scaling