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 | 
| 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 | 
| 0 | Optimized Model Structure | C4-N7...N2-N1 N3-O6...O2'-C8 | |
| 2 | Optimized Model Structure | C6-N3...O6-N1 N1-N2...N7-N9 |