A Portal for Three-dimensional Structural Information about Nucleic Acids
As of 18-May-2022 number of released structures: 12082
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NDB ID: 2I7Z  PDB ID: 2I7Z 


Base Pair Morphology Step Parameters

CSV Format

Model NumberStep NumberStep NameShiftSlideRiseTiltRollTwistX-DisplacementY-DisplacementHelical RiseInclinationTipHelical Twist
14AA_A4U5:G39U40_AA0.939-0.3713.7442.6831.239.912-0.701-1.0183.7851.756-3.92440.015
17AA_A6C35:G8A64_AB4.3164.921-0.443141.2538.743-53.599-2.0940.583-5.04-21.7679.334-150.158
126AB_A21G51:C78A49_BB4.631-2.4664.141-25.35617.44828.694-4.553-8.083-0.8827.21239.54741.842
16AA_A37A6:A64A38_BA-0.4193.714-1.337-169.38740.109-171.624-1.845-0.161-1.425-20.056-84.701-179.567
119AA_C24A23:G20G19_AA-0.9350.06-3.2760.005-14.28-42.071-1.411-1.239-3.09919.2370.007-44.324
112AA_C31U30:A13G12_AA-0.4390.826-3.1-2.387-16.582-33.961-3.206-0.401-2.47326.484-3.813-37.758
19AA_C34U33:A10G9_AA-0.7291.726-4.2342.299-2.078-29.466-3.932-2.041-4.0384.0724.503-29.625
18AA_C35C34:G9G8_AA1.4211.269-3.216-1.975-15.866-35.514-3.6422.353-2.37924.536-3.054-38.841
11AA_G1G2:C42U43_AA0.137-1.6333.329-4.076-2.18129.213-2.721-1.1623.389-4.2918.01929.569
12AA_G2G3:C41C42_AA0.166-0.4694.102-0.189.18736.933-2.169-0.2833.87814.2340.27938.02
13AA_G3A4:U40C41_AA-0.026-0.5054.021-1.7150.94930.761-1.177-0.3624.01.7873.22930.822
116AA_G27U26:G17C16_AA-1.8920.68-3.64-12.183-6.092-23.338-3.371-0.228-3.84813.668-27.334-26.975
115AA_G28G27:C16C15_AA1.4480.16-3.5555.271-24.798-33.133-3.1781.416-2.94737.4317.957-41.502
15AA_U5A37:A38G39_AA-0.7524.631-2.379142.08784.037114.3152.58-0.06-1.08242.62-72.061171.924
118AA_U25C24:G19G18_AA-0.5051.174-3.8090.349-0.287-37.734-1.858-0.833-3.7950.4440.539-37.736
117AA_U26U25:G18G17_AA-0.1491.916-3.3-9.49-20.051-28.36-5.5460.911-1.61534.952-16.542-35.864
114AA_U29G28:C15A14_AA-0.0820.912-3.4052.725-23.116-23.449-5.313-0.582-1.80445.0745.314-32.924
113AA_U30U29:A14A13_AA-0.2050.445-3.943-2.174-5.945-29.945-2.2490.125-3.79211.347-4.148-30.592
111AA_U32C31:G12A11_AA0.0180.352-4.149-0.43-23.706-37.444-3.2650.074-3.36533.178-0.601-44.09
110AA_U33U32:A11A10_AA-0.4510.92-3.903-2.23712.017-26.1221.546-0.274-3.959-24.924-4.639-28.796
123BB_A47U48:G82U83_BB0.896-0.3013.772.37411.36245.278-1.473-0.9033.63814.479-3.02546.667
129BB_A53A54:U75U76_BB0.162-0.7833.9421.8631.69734.034-1.6580.0793.9032.894-3.17734.124
130BB_A54G55:C74U75_BB-0.773-0.4083.7280.58916.26632.173-3.2481.3453.15527.28-0.98935.959
132BB_A56A57:U72U73_BB-0.37-0.833.8791.19215.78131.385-4.0590.8173.10727.12-2.04835.059
133BB_A57C58:G71U72_BB0.52-1.0783.450.97824.71424.321-5.389-0.7351.70246.11-1.82534.555
125BA_A80A21:A49A81_BB-1.4754.688-1.273-162.02548.942-87.146-2.0920.113-2.88-24.952-82.605-172.221
134BB_C58C59:G70G71_BB1.68-0.3933.86.85212.38632.58-2.82-1.5563.68420.893-11.55735.446
135BB_C59G60:U69G70_BB-1.957-0.8773.487-9.59811.62523.81-4.8651.5013.26125.19920.80528.123
120BB_G44G45:C85U86_BB0.224-1.7563.392-4.1161.61926.605-4.186-1.5483.2113.4888.86526.964
121BB_G45G46:C84C85_BB-0.027-0.4414.1730.1125.49537.86-1.5480.0594.0718.415-0.17238.242
122BB_G46A47:U83C84_BB-0.418-0.3923.709-1.72712.76231.451-2.9620.4073.32322.4033.03233.924
127BB_G51G52:C77C78_BB0.906-1.3363.3790.40210.22734.839-3.551-1.4012.89516.642-0.65536.267
128BB_G52A53:U76C77_BB-0.598-1.1854.003-1.6716.20230.763-3.5780.7313.72511.5343.10731.411
131BB_G55A56:U73C74_BB-0.366-1.0213.173-4.33111.08629.126-3.808-0.0752.64420.9748.19331.415
136BB_G60G61:U68U69_BB-0.296-1.6943.453-6.88517.40427.045-5.772-0.5722.03932.70912.93932.791
137BB_G61G62:C67U68_BB-0.167-1.2513.859-2.47412.50434.116-3.958-0.1183.22320.4484.04536.353
138BB_G62G63:A66C67_BB-0.516-0.2413.402-2.9848.84743.148-1.1850.3963.31911.8654.00244.1
124BB_U48A80:A81G82_BB-0.3674.407-2.502135.76171.563120.3122.453-0.261-1.34136.578-69.392166.885

The above values were obtained using first alternate conformation only and calculated by 3DNA program.
Xiang-Jun Lu & Wilma K. Olson (2003). '3DNA: a software package for the analysis, rebuilding and visualization of three-dimensional nucleic acid structures', Nucleic Acids Res.31(17), 5108-21.
Xiang-Jun Lu & Wilma K. Olson (2008). '3DNA: a versatile, integrated software system for the analysis, rebuilding and visualization of three-dimensional nucleic-acid structures', Nat Protoc.3(7), 1213-27.