7LL0

Crystal structure of a four-tetrad, parallel, and K+ stabilized Tetrahymena thermophila telomeric G-quadruplex

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]	196
Detector technology	CCD
Collection date	2020-11-18
Detector	ADSC QUANTUM 315
Wavelength(s)	0.97918
Spacegroup name	P 2 21 21
Unit cell lengths	30.090, 36.474, 53.253
Unit cell angles	90.00, 90.00, 90.00

Refinement procedure

Resolution	30.090 - 2.000
R-factor	0.2168
Rwork	0.214
R-free	0.23920
Structure solution method	MOLECULAR REPLACEMENT
Starting model (for MR)	7jku
RMSD bond length	0.010
RMSD bond angle	1.045
Data reduction software	XDS
Data scaling software	Aimless
Phasing software	PHENIX (1.18_3845)
Refinement software	PHENIX (1.18_3845)

Data quality characteristics

	Overall	Outer shell
Low resolution limit [Å]	53.250	2.050
High resolution limit [Å]	1.990	1.990
Rmerge	0.069
Rmeas	0.074
Rpim	0.025	0.753
Number of reflections	4313	299
<I/σ(I)>	12	0.5
Completeness [%]	99.6	95.8
Redundancy	8.9	8.4
CC(1/2)	0.999	0.418

Crystallization Conditions

crystal ID	method	pH	temperature	details
1	VAPOR DIFFUSION, HANGING DROP	6.5	293	sodium cacodylate, KCl, PEG, NaCl, ethylene glycol