Basepairs involving Hoogsteen edge of Guanine and WatsonCrick edge of Guanine

Basepairs involving Hoogsteen(H) edge of Guanine and WatsonCrick(W) edge of Guanine 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:G H:W Cis	51/ 3	Residue Nos. 1053(A)-1057(A) PDB ID 2QAL	N9-N1...O6-N1 N3-N2...N7-N9
G:G H:W Trans	42/ 1	Residue Nos. 46(T)-22(T) PDB ID 1H4S	N9-N7...N1-N9 N1-O6...N2-N3

Basepair

(type & Orientation)

*Frequency

Example

Hydrogen bonding atoms with their precursors

G:G H:W Cis

51/
3

Residue Nos. 1053(A)-1057(A) PDB ID 2QAL

N9-N1...O6-N1

N3-N2...N7-N9

G:G H:W Trans

42/
1

Residue Nos. 46(T)-22(T) PDB ID 1H4S

N9-N7...N1-N9

N1-O6...N2-N3