4Y1M

An Escherichia coli yybP-ykoY Mn riboswitch in the Mn2+-free state

Experimental procedure

Experimental method	MAD
Source type	SYNCHROTRON
Source details	APS BEAMLINE 24-ID-C
Synchrotron site	APS
Beamline	24-ID-C
Temperature [K]	80
Detector technology	PIXEL
Collection date	2014-06-22
Detector	PSI PILATUS 6M
Wavelength(s)	0.769, 0.7692, 0.9999
Spacegroup name	H 3 2
Unit cell lengths	159.384, 159.384, 277.108
Unit cell angles	90.00, 90.00, 120.00

Refinement procedure

Resolution	123.600 - 3.000
R-factor	0.2186
Rwork	0.217
R-free	0.25210
Structure solution method	MAD
RMSD bond length	0.002
RMSD bond angle	0.614
Data reduction software	XDS
Data scaling software	Aimless
Phasing software	SHELX
Refinement software	PHENIX ((phenix.refine: dev_1834))

Data quality characteristics

	Overall	Outer shell
Low resolution limit [Å]	123.600	3.110
High resolution limit [Å]	3.000	3.000
Rmerge	0.116	1.010
Number of reflections	27410
<I/σ(I)>	20.2	2.41
Completeness [%]	100.0	100
Redundancy	11.3	11.6

Crystallization Conditions

crystal ID	method	pH	temperature	details
1	VAPOR DIFFUSION, HANGING DROP		294	0.2 mM RNA in 10 mm NaCacodylate, 50 mM NaCl, 10 mM MgCl2 with a mother liquor of 10% MPD, 40 mM Na cacodylate pH 7, 80 mM SrCl2, 20 mM MgCl2, 12 mM spermine tetra-HCl at 21 C. Native crystals were quickly cryo-protected in mother liquor plus 20% ethylene glycol prior to flash freezing in liquid N2.