Basepairs involving WatsonCrick(W) 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 W:W Cis

151

Residue Nos. 216(B)-205(B) PDB ID 1LNG

N9-N1...N1-N9

N7-O6...N6-N7

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 w:w Trans

0

Optimized Model Structure

C5-N1...N1-C4

C4-C2...O6-N7

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