Basepairs involving Sugar(S) edge of Adenine and WatsonCrick(W) edge of Guanine is shown. Highlighted examples are found from RNA crystal structures obtained from PDB.

Base pairs stabilized by N-H...N/O type hydrogen bonds only

Basepair

(type & Orientation)

*Frequency

Example

Hydrogen bonding atoms with their precursors

A:G S:W Cis

1/
1

Optimized Model Structure

C5-N3...N1-C4

C8-O2'...N2-N3

Base pairs stabilized by C-H...N/O interactions along with N-H...N/O hydrogen bonds

Basepair

(type & Orientation)

*Frequency

Example

Hydrogen bonding atoms with their precursors

A:G s:w Cis

4

Optimized Model Structure

C6-C2...O6-N3

C5-N3...N1-C4

* 1st and 2nd numbers in Frequency column represent the numbers of occurences as base pairs and as base triplets, respectively.