6JCX

Mycobacterium tuberculosis transcription initiation complex with ECF sigma factor sigma H and 6nt RNA

Experimental procedure

Experimental method	SINGLE WAVELENGTH
Source type	SYNCHROTRON
Source details	SSRF BEAMLINE BL19U1
Synchrotron site	SSRF
Beamline	BL19U1
Temperature [K]	100
Detector technology	PIXEL
Collection date	2018-06-18
Detector	DECTRIS EIGER X 9M
Wavelength(s)	0.97890
Spacegroup name	P 1 21 1
Unit cell lengths	125.139, 161.001, 128.846
Unit cell angles	90.00, 117.06, 90.00

Refinement procedure

Resolution	36.087 - 2.903
R-factor	0.2114
Rwork	0.210
R-free	0.25610
Structure solution method	MOLECULAR REPLACEMENT
Starting model (for MR)	5zx3
Data reduction software	HKL-2000
Data scaling software	HKL-2000
Phasing software	PHENIX
Refinement software	PHENIX (1.14_3260)

Data quality characteristics

	Overall	Inner shell	Outer shell
Low resolution limit [Å]	50.000	50.000	2.950
High resolution limit [Å]	2.900	7.860	2.900
Rmerge	0.125	0.044	0.877
Rmeas	0.138	0.048	0.978
Rpim	0.056	0.019	0.420
Number of reflections	98120	5105	4038
<I/σ(I)>	5.2		1.217
Completeness [%]	98.0	99.5	81.3
Redundancy	5.9	5.8	5
CC(1/2)	0.988	0.997	0.654

Crystallization Conditions

crystal ID	method	pH	temperature	details
1	VAPOR DIFFUSION, HANGING DROP		295	0.08M Magnesium acetate, 0.05M sodium cacodylate pH 6.5, 15% PEG 400