Basepairs involving Sugar(S) edge of Guanine and WatsonCrick(W) edge of Uracil 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

G:U S:W Cis

11

Residue Nos. 1329(A)-1283(A) PDB ID 2J01

C6-N3...N3-C6

N1-N2...O4-C5

G:U S:W Trans

4

Optimized Model Structure

C6-N3...N3-C6

N1-N2...O2-C1'

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