6UTW

E. coli sigma-S transcription initiation complex with a 4-nt RNA ("Fresh" crystal)

This is a non-PDB format compatible entry.

Experimental procedure

Experimental method	SINGLE WAVELENGTH
Source type	SYNCHROTRON
Source details	APS BEAMLINE 24-ID-E
Synchrotron site	APS
Beamline	24-ID-E
Temperature [K]	100
Detector technology	PIXEL
Collection date	2017-06-09
Detector	DECTRIS PILATUS 6M-F
Wavelength(s)	0.97918
Spacegroup name	P 21 21 21
Unit cell lengths	132.990, 155.447, 234.735
Unit cell angles	90.00, 90.00, 90.00

Refinement procedure

Resolution	49.396 - 3.854
Rwork	0.268
R-free	0.32930
Structure solution method	MOLECULAR REPLACEMENT
Starting model (for MR)	5ipl
RMSD bond length	0.006
RMSD bond angle	1.389
Data reduction software	XDS
Data scaling software	XDS
Phasing software	PHASER
Refinement software	REFMAC (5.8.0257)

Data quality characteristics

	Overall	Outer shell
Low resolution limit [Å]	49.400	4.090
High resolution limit [Å]	3.850	3.850
Number of reflections	43708	6652
<I/σ(I)>	8.85	0.49
Completeness [%]	93.7	90.2
Redundancy	3.54	3.25
CC(1/2)	0.999	0.193

Crystallization Conditions

crystal ID	method	pH	temperature	details
1	VAPOR DIFFUSION, SITTING DROP	8	295	PEG3350, sodium chloride, HEPES