7S00

X-ray structure of the phage AR9 non-virion RNA polymerase core

Experimental procedure

Experimental method	SINGLE WAVELENGTH
Source type	SYNCHROTRON
Source details	APS BEAMLINE 21-ID-G
Synchrotron site	APS
Beamline	21-ID-G
Temperature [K]	100
Detector technology	CCD
Collection date	2017-06-24
Detector	RAYONIX MX-300
Wavelength(s)	0.9786
Spacegroup name	P 21 21 21
Unit cell lengths	112.858, 166.270, 307.215
Unit cell angles	90.00, 90.00, 90.00

Refinement procedure

Resolution	49.420 - 3.300
R-factor	0.2208
Rwork	0.219
R-free	0.25770
Structure solution method	MOLECULAR REPLACEMENT
Starting model (for MR)	7s01
RMSD bond length	0.003
RMSD bond angle	0.575
Data reduction software	XDS
Data scaling software	XDS
Phasing software	PHASER
Refinement software	PHENIX (1.19.2_4158)

Data quality characteristics

	Overall	Inner shell	Outer shell
Low resolution limit [Å]	50.000	3.740	3.500
High resolution limit [Å]	3.300	3.500	3.300
Rmeas	0.139	0.757	1.420
Number of reflections	87373	13096	13885
<I/σ(I)>	10.07	2.39	1.17
Completeness [%]	98.6	99.3	98.7
Redundancy	4.49		4.15
CC(1/2)	0.998	0.774	0.421

Crystallization Conditions

crystal ID	method	pH	temperature	details
1	VAPOR DIFFUSION, HANGING DROP	8.8	293	an 1.5 ul aliquot of AR9 nvRNAP core (4.5 mg/mL) was mixed with an equal volume of a solution containing 100 mM Tricine pH 8.8, 270 mM KNO3, 15 % PEG 6000, 5 mM MgCl2, and incubated as a hanging drop over the same solution