8TIX

Isoreticular, interpenetrating co-crystal of Replication Initiator Protein REPE54 and symmetrical expanded duplex (31mer) containing the cognate REPE54 sequence and an additional G-C rich sequence with 1 sticky bases and 5' terminal phosphates and crosslinked with EDC.

Experimental procedure

Experimental method	SINGLE WAVELENGTH
Source type	SYNCHROTRON
Source details	ALS BEAMLINE 4.2.2
Synchrotron site	ALS
Beamline	4.2.2
Temperature [K]	100
Detector technology	CMOS
Collection date	2021-11-12
Detector	RDI CMOS_8M
Wavelength(s)	1.0
Spacegroup name	I 2 2 2
Unit cell lengths	74.031, 128.453, 136.808
Unit cell angles	90.00, 90.00, 90.00

Refinement procedure

Resolution	37.020 - 2.910
R-factor	0.2004
Rwork	0.197
R-free	0.22820
Structure solution method	MOLECULAR REPLACEMENT
RMSD bond length	0.012
RMSD bond angle	1.475
Data reduction software	XDS (Jan 31, 2020)
Data scaling software	XSCALE (Jan 31, 2020)
Phasing software	PHASER (2.8.2)
Refinement software	PHENIX (1.18.2_3874)

Data quality characteristics

	Overall	Outer shell
Low resolution limit [Å]	37.020	3.014
High resolution limit [Å]	2.910	2.910
Rmerge	0.052	1.186
Rmeas	0.056	1.275
Rpim	0.021	0.465
Number of reflections	14533	1431
<I/σ(I)>	25.44	1.85
Completeness [%]	98.4	99.72
Redundancy	7.2	7.5
CC(1/2)	0.999	0.868

Crystallization Conditions

crystal ID	method	pH	temperature	details
1	VAPOR DIFFUSION, SITTING DROP	8	298	350 mM MgCl2, 30% PEG 400, and 100 mM Tris HCl