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

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:A w:w Cis

12/3

Residue Nos. 16(A)-919(A) PDB ID 2VQE

C5-N1 ... N6-N7

N3-C2 ... N1-C4

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

Basepair

(type & Orientation)

*Frequency

Example

Hydrogen bonding atoms with their precursors

A:A W:W Trans

61/
39

Residue Nos: 233(A)-429(A) PDB ID 2J01

N7-N6 ... N1-N9

N9-N1 ... N6-N7

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