Table 3. Interactions observed between protein and RNA and within RNA.

Residue/Base* or Base/Base*	Between atoms	Bond type	Distance (Å)
Lys14/G0	NZ/2′-OH	Hydrogen bond	3.3/3.2
Leu17/G0	O/N2	Hydrogen bond	3.0/2.9
Asn18/A1	O/N1	Hydrogen bond	2.9/2.7
Asn18/G0	OD/2′OH	Hydrogen bond	2.6/2.7
Leu20/G0	O/N2	Hydrogen bond	2.4/2.5
Phe25/G0	Aromatic ring	Aromatic stacking	-
Pro152/A1	Pro152 ring and A1 ribose	Van der Waals	3.6/3.7
G2/G8	O6/N2	Hydrogen bond	2.7
G2/G8	N7/N1	Hydrogen bond	2.9
G2/A4′	O2/N1	Hydrogen bond	3.3
A4/U7′	N6/O4	Hydrogen bond	2.4

^*Interactions between the MTase and the RNA octamer. Also listed the intramolecular RNA interactions. Primed numbers indicate residues related by the 2-fold ncs axis.