Table 2.

Outer sphere coordination for Mg²⁺ ions in the crystal structure of the AdoCbl riboswitch (S. thermophilum; Peselis and Serganov, 2012) as calculated by MINAS (Schnabl et al., 2011).

Ligand	Mg2+ (A310)				Mg2+ (A311)
O2′					+
O4′				+
O6	+	+	+
N7		+	+	+
OP1				+		+
OP2				+
Nucleo-base	G96	G97	G98	G130	G65*	U66
Region	J8/10; P8				P5/L5

Numbering is according to the crystal structure and the conserved G65 is marked by an asterisk.