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: 2M21  PDB ID: 2M21 


Base Pair Morphology Step Parameters

CSV Format

Model NumberStep NumberStep NameShiftSlideRiseTiltRollTwistX-DisplacementY-DisplacementHelical RiseInclinationTipHelical Twist
15AA_A5U6:A16U17_AA0.05-1.0834.053-0.9169.24929.083-4.252-0.3123.54617.8511.76830.501
17AA_A7C8:U14U15_AA-1.244-1.2363.8890.24416.7527.035-5.6172.3252.67632.204-0.46831.722
13AA_C3G4:C18G19_AA-1.27-0.4253.562-5.74512.75633.043-2.7131.1563.34621.289.58435.806
11AA_G1G2:C20C21_AA-1.143-0.5373.437-4.7768.67935.592-2.0881.1243.3413.8717.63336.902
12AA_G2C3:G19C20_AA0.183-0.8664.353-0.09-1.3329.614-1.317-0.3834.386-2.6010.17529.643
14AA_G4A5:U17C18_AA-0.981-0.4254.028-2.66217.65235.645-3.1321.0653.50926.864.0539.735
16AA_U6A7:U15A16_AA-1.219-0.7143.4230.3924.29538.432-3.0921.6192.55133.184-0.53345.222

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.