4NCA

Structure of Thermus thermophilus Argonaute bound to guide DNA 19-mer and target DNA in the presence of Mg2+

Experimental procedure

Experimental method	SINGLE WAVELENGTH
Source type	SYNCHROTRON
Source details	SSRF BEAMLINE BL17U
Synchrotron site	SSRF
Beamline	BL17U
Temperature [K]	100
Detector technology	CCD
Collection date	2012-11-15
Detector	ADSC QUANTUM 315r
Wavelength(s)	0.97
Spacegroup name	P 21 21 21
Unit cell lengths	110.950, 117.561, 160.380
Unit cell angles	90.00, 90.00, 90.00

Refinement procedure

Resolution	48.161 - 2.489
R-factor	0.2026
Rwork	0.200
R-free	0.24520
Structure solution method	MOLECULAR REPLACEMENT
RMSD bond length	0.010
RMSD bond angle	0.906
Data reduction software	DENZO
Data scaling software	SCALEPACK
Phasing software	PHASER
Refinement software	PHENIX (1.8.2_1309)

Data quality characteristics

	Overall	Inner shell	Outer shell
Low resolution limit [Å]	50.000	50.000	2.590
High resolution limit [Å]	2.489	5.380	2.489
Rmerge	0.127	0.040	0.920
Number of reflections	73777
<I/σ(I)>	6.5
Completeness [%]	99.9	99.9	99.5
Redundancy	6.6	6.9	6

Crystallization Conditions

crystal ID	method	pH	temperature	details
1	VAPOR DIFFUSION, HANGING DROP	7	306	2.6 M sodium acetate, 0.1 M Bis-Tris propane, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 306K