A Portal for Three-dimensional Structural Information about Nucleic Acids
As of 11-May-2022 number of released structures: 12077
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NDB ID: 2IRO  PDB ID: 2IRO 


Base Pair Morphology Step Parameters

CSV Format

Model NumberStep NumberStep NameShiftSlideRiseTiltRollTwistX-DisplacementY-DisplacementHelical RiseInclinationTipHelical Twist
15AA_A5U6:G12G13_BB0.859-0.4593.182-5.9291.61220.938-1.801-4.4362.7924.31815.87921.811
12AA_C2G3:U15G16_BB-0.561-0.0813.2214.30815.48159.733-0.7890.7453.07615.247-4.24361.664
11AA_G1C2:G16C17_BB0.565-1.5243.336-5.127-1.54831.52-2.482-1.9713.275-2.8259.35331.96
13AA_G3G4:A14U15_BB-0.604-0.6263.2516.5770.38920.266-1.8474.2382.8991.07-18.08521.299
14AA_G4A5:G13A14_BB0.024-1.7383.796-0.1847.688-3.228-19.428-0.5833.072-67.247-1.608-8.339
17AA_G7C8:G10C11_BB-0.53-1.5793.3665.262-1.61332.068-2.5291.8923.313-2.893-9.43832.524
16AA_U6G7:C11G12_BB0.485-0.0663.176-4.99714.33659.847-0.715-0.7013.04514.1244.92461.569

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.