Table 1.

Structural statistics

NMR distance and torsion angle restraints
NOE-derived distance restraints
Total	316
Intra-residue	216
Inter-residue	100
Sequential	70
Long-range	30
Hydrogen bond restraints	24
Torsion angle restraints	65
G-quartet planarity restraints	36
Structure statistics
Violations
Mean NOE restraint violation (Å)	0.079 ± 0.0002
Max. NOE restraint violation (Å)	0.196
Max. torsion angle restraint violation (°)	4.765
Deviations from idealized geometry
Bond length (Å)	0.012 ± 0.0002
Bond angle (°)	2.525 ± 0.0000
Pairwise heavy atom RMSD (Å)
Overall	2.63
G-quartets	0.82
G-quartets and propeller (AT) loop	0.96
G-quartets and diagonal (ACACA) loop	2.60
G-quartets and edgewise (GAC) loop	1.51
G-quartets and A4, T5, G17, C19	0.99