Basepairs involving Sugar(S) edge of Guanine and Hoogsteen(H) edge of Uracil 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

G:U s:h Cis

57/
3

Residue Nos. 890(A)-891(A) PDB ID 2VQE

N1-N2...O4-N3

C6-N3...C5-C2

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