Basepairs involving WatsonCrick(W) edge of Cytosine and WatsonCrick(W) edge of Cytosine 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
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Basepair
(type & Orientation)
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*Frequency
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Example
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Hydrogen bonding atoms with their
precursors
|
|
C:C W:+ Cis
|
8
| Optimized Model Structure
|
C1'-O2...N3-C6
C6-N3...N4-C5
|
|
C:C +:W Trans
|
1
| Optimized Model Structure
|
C6-N3...N3-C6
C5-N4...O2-C1'
C1'-O2...N4-C5
|
|
C:C W:W Trans
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2
| Optimized Model Structure
|
C5-N4...N3-C6
C6-N3...N4-C5
|