Basepairs involving WatsonCrick edge of Uracil and Hoogsteen edge of Uracil

Basepairs involving WatsonCrick(W) edge of Uracil 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
U:U w:h Cis	7	Optimized Model Structure	C5-N3...O4-N3 N1-O2...C5-C2
U:U w:h Trans	17	Residue Nos. 2781(0)-2791(0) PDB ID 3CME	N1-N3...O4-N3 C5-O4...C5-N1

Basepair

(type & Orientation)

*Frequency

Example

Hydrogen bonding atoms with their precursors

U:U w:h Cis

Optimized Model Structure

C5-N3...O4-N3

N1-O2...C5-C2

U:U w:h Trans

Residue Nos. 2781(0)-2791(0) PDB ID 3CME

N1-N3...O4-N3

C5-O4...C5-N1