A Portal for Three-dimensional Structural Information about Nucleic Acids
As of 29-Jun-2022 number of released structures: 12153
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NDB ID: 4X4S  PDB ID: 4X4S 


Base Pair Hydrogen Bonding Classification

CSV Format

Model NumberPair NumberPair NameLeontis / Westhof ClassificationSaenger Classification
110B_A10:U22_B120
13B_C3:G32_B119
14B_C4:G28_B10
16B_C6:G26_B119
19B_C9:G23_B119
11B_G1:C34_B119
12B_G2:C33_B119
15B_G5:C27_B10
17B_G7:C25_B119
18B_G8:C24_B119
111B_G11:C21_B119
112B_G12:C20_B119
113B_U13:A17_B424
120D_A10:U22_D00
116D_C3:G32_D00
119D_C9:G23_D119
114D_G1:C34_D119
115D_G2:C33_D119
117D_G7:C25_D119
118D_G8:C24_D119
121D_G11:C21_D10
122D_G12:C20_D119

Leontis/Westhof Classification Legend

Base-Phosphate Interactions Legend

Base-Stacking Interactions Legend

Saenger Classification Legend

Correspondence of Leontis/Westhof names to Saenger numbering (table)