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: 2IRN  PDB ID: 2IRN 


Base Pair Morphology Step Parameters

CSV Format

Model NumberStep NumberStep NameShiftSlideRiseTiltRollTwistX-DisplacementY-DisplacementHelical RiseInclinationTipHelical Twist
15AA_A5G6:U12G13_BB0.6270.4633.194-0.4911.42450.364-0.239-0.7533.21513.2280.56751.563
12AA_C2U3:G15G16_BB0.798-0.6793.4824.1147.46441.355-1.757-0.663.37510.435-5.75142.187
11AA_G1C2:G16C17_BB-1.321-1.2073.1271.3014.39643.166-2.0311.9042.9575.955-1.76243.397
14AA_G4A5:G13A14_BB0.295-1.3223.511-0.030.525-14.4634.7421.1413.557-2.085-0.119-14.472
16AA_G6G7:C11U12_BB-0.854-0.4853.602-3.1487.16739.922-1.5730.8453.52210.3774.55740.651
17AA_G7C8:G10C11_BB1.224-1.2253.035-0.6413.81642.935-2.009-1.7232.9045.2010.87343.101
13AA_U3G4:A14G15_BB-0.9020.083.2721.589.32652.281-0.5081.1113.21510.486-1.77653.07

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.