Experiment: 2R21

Structure of the RNA brominated tridecamer r(GCGUU-5BUGAAACGC) at 1.6 A (BrMn)

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7	294	0.5mM MnCl2, 100mM NaCl, 30% MPD, 50mM Tris, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 294K

Crystal Properties
Matthews coefficient	Solvent content
2.1	41.36

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 25.25	α = 98.13
b = 25.65	β = 106.15
c = 29.72	γ = 100.83

Symmetry
Space Group	P 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	80	IMAGE PLATE	MAR scanner 345 mm plate		2003-05-04	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE BM30A	0.919487,0.919704,0.88558,0.979776	ESRF	BM30A

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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	1.59	20	94.4	0.117	9.4	4.8	1.9	8713	8713

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)
	1.59	1.68	84.9		0.23	21	2.6	1.9	1160

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-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	Mean Isotropic B
X-RAY DIFFRACTION	MAD	1.59	20	146	8713	1376	56	0.169	0.1607	0.191	0.1805	14.009

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]
-0.299	-0.023	-0.901	0.339	-0.669	-0.04

RMS Deviations
Key	Refinement Restraint Deviation
c_angle_d	0.89251
c_bond_d	0.005185

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms
Nucleic Acid Atoms	552
Solvent Atoms	162
Heterogen Atoms	5

Software

Software
Software Name	Purpose
SCALA	data scaling
CNS	phasing
CNS	refinement
PDB_EXTRACT	data extraction
MAR345dtb	data collection
MOSFLM	data reduction