A Portal for Three-dimensional Structural Information about Nucleic Acids
As of 12-Aug-2022 number of released structures: 12231
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NDB ID: 4X4P  PDB ID: 4X4P 


Base Pair Hydrogen Bonding Classification

CSV Format

Model NumberPair NumberPair NameLeontis / Westhof ClassificationSaenger Classification
13B_C3:G32_B119
14B_C4:G28_B00
16B_C6:G26_B119
19B_C9:G23_B119
11B_G1:C34_B10
12B_G2:C33_B119
15B_G5:C27_B119
17B_G7:C25_B119
18B_G8:C24_B10
110B_G11:C21_B119
111B_G12:C20_B119
120D_A10:U22_D10
114D_C3:G32_D119
116D_C6:G26_D10
119D_C9:G23_D119
112D_G1:C34_D00
113D_G2:C33_D119
115D_G5:C27_D119
117D_G7:C25_D10
118D_G8:C24_D119
121D_G11:C21_D119
122D_G12:C20_D119
127F_A10:U22_F120
125F_C3:G32_F119
126F_C9:G23_F10
123F_G1:C34_F119
124F_G2:C33_F119
128F_G11:C21_F119
135H_A10:U22_H10
131H_C3:G32_H119
134H_C9:G23_H119
129H_G1:C34_H119
130H_G2:C33_H119
132H_G7:C25_H119
133H_G8:C24_H10
136H_G11:C21_H119
137H_G12:C20_H119
138H_U13:U19_H00

Leontis/Westhof Classification Legend

Base-Phosphate Interactions Legend

Base-Stacking Interactions Legend

Saenger Classification Legend

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