Basepairs involving Hoogsteen(H) edge of Guanine and Sugar(S) edge of Guanine 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:G h:s Cis

0

Optimized Model Structure

C4-N7...N2-N1

C4-C8...N3-C6

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

Basepair

(type & Orientation)

*Frequency

Example

Hydrogen bonding atoms with their precursors

G:G H:S Trans

0

Optimized Model Structure

C4-N7...N2-N1

N3-O6...O2'-C8

G:G H:z Trans

2

Optimized Model Structure

C6-N3...O6-N1

N1-N2...N7-N9

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