3P4A

2'Fluoro modified RNA octamer fA2U2

Experimental procedure

Experimental method	SAD
Source type	SYNCHROTRON
Source details	APS BEAMLINE 21-ID-D
Synchrotron site	APS
Beamline	21-ID-D
Temperature [K]	100
Detector technology	CCD
Collection date	2008-11-17
Detector	MARMOSAIC 300 mm CCD
Wavelength(s)	0.7689
Spacegroup name	P 3
Unit cell lengths	43.245, 43.245, 60.791
Unit cell angles	90.00, 90.00, 120.00

Refinement procedure

Resolution	30.000 - 1.200
R-factor	0.17
Rwork	0.170
R-free	0.23400
Structure solution method	SAD
RMSD bond length	0.010
RMSD bond angle	0.026
Data reduction software	HKL-2000
Data scaling software	HKL-2000
Phasing software	HKL2Map
Refinement software	SHELXL-97

Data quality characteristics

	Overall	Outer shell
Low resolution limit [Å]	30.000	1.240
High resolution limit [Å]	1.200	1.200
Rmerge	0.050	0.280
Number of reflections	39940
<I/σ(I)>	38.8	3.4
Completeness [%]	99.7	99.3
Redundancy	4.5	3.7

Crystallization Conditions

crystal ID	method	pH	temperature	details
1	VAPOR DIFFUSION, HANGING DROP	6	291	40mM Sodium cacodylate pH 6.0, 80 mM strontium chloride, 20 mM magnesium chloride, 12mM spermine tetrahydrochloride, 10% 2-methyl-2,4-pentanediol, equilibrated against a reservoir of 35% MPD, VAPOR DIFFUSION, HANGING DROP, temperature 291K
1	VAPOR DIFFUSION, HANGING DROP	6	291	40mM Sodium cacodylate pH 6.0, 80 mM strontium chloride, 20 mM magnesium chloride, 12mM spermine tetrahydrochloride, 10% 2-methyl-2,4-pentanediol, equilibrated against a reservoir of 35% MPD, VAPOR DIFFUSION, HANGING DROP, temperature 291K