Basepairs involving WatsonCrick(W) edge of Uracil and WatsonCrick(W) 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
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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
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U:U W:W Cis
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84
| Residue Nos. 1856(B)-1886(B) PDB ID 2QAO
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C6-N3...O4-C5
C1'-O2...N3-C6
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U:U W:W Trans (1)
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1
| Optimized Model Structure
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C5-O4...N3-C6
C6-N3...O4-C5
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U:U W:W Trans (2)
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20
| Residue Nos. 956(A)-960(A) PDB ID 2J02
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C1'-O2...N3-C6
C6-N3...O2-C1'
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