Basepairs involving Sugar edge of Cytosine and Sugar edge of Uracil

Basepairs involving Sugar(S) edge of Cytosine and Sugar(S) 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
C:U S:S Trans	0	Hypothesis	C5-O2...C1'-C6 C6-C1'...O2-C5

Basepair

(type & Orientation)

*Frequency

Example

Hydrogen bonding atoms with their precursors

C:U S:S Trans

Hypothesis

C5-O2...C1'-C6

C6-C1'...O2-C5