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: 1A51  PDB ID: 1A51 


Base Pair Morphology Step Parameters

CSV Format

Model NumberStep NumberStep NameShiftSlideRiseTiltRollTwistX-DisplacementY-DisplacementHelical RiseInclinationTipHelical Twist
16AA_A73U74:G102U103_AA0.836-3.3233.2761.2019.34456.733-3.928-0.8092.7599.758-1.25457.445
111AA_A78G79:C97G98_AA-0.202-0.7773.251-4.8697.18765.5-0.999-0.0093.1666.6124.47966.009
13AA_C70C71:G105G106_AA0.205-1.9033.3111.5912.95335.26-4.51-0.1282.4920.535-2.5237.526
14AA_C71G72:A104G105_AA-0.4570.0393.0780.3438.7659.505-0.3690.4733.0538.774-0.34360.089
11AA_G68G69:C107C108_AA0.173-1.6543.083-1.25814.79537.831-3.798-0.3692.29821.821.85540.541
12AA_G69C70:G106C107_AA-0.072-0.483.1110.93519.14134.15-2.8480.2112.50529.86-1.45939.02
15AA_G72A73:U103A104_AA-6.189-0.6342.889-8.309-2.698-11.7953.121-26.207-1.28411.314-34.835-14.669
18AA_G75G76:G100A101_AA-0.551-2.7123.2770.6880.57559.714-2.7520.5883.2470.578-0.69159.72
19AA_G76U77:A99G100_AA-0.774-2.3223.128-5.294-4.10245.583-2.6160.5353.378-5.2616.7946.046
112AA_G79U80:G96C97_AA-0.366-0.6593.116-0.392.14543.504-1.0840.4583.0852.8920.52643.556
114AA_G81U82:A94U95_AA0.374-0.8212.976-7.47-6.27639.831-0.543-1.2852.953-9.04810.7740.961
116AA_G83G84:C92C93_AA0.416-1.53.6383.641-8.11332.748-1.041-0.0253.91-14.068-6.31433.901
117AA_G84G85:C91C92_AA0.275-1.8713.695-3.083-8.88227.627-1.363-1.3644.036-17.9536.23229.153
118AA_G85G86:C90C91_AA2.655-1.0763.4634.4636.49734.017-2.859-3.6973.51410.923-7.50434.892
17AA_U74G75:A101G102_AA1.251-2.2543.0140.415-0.98339.548-3.222-1.8043.08-1.453-0.61439.561
110AA_U77A78:G98A99_AA5.492-0.9323.134-0.8452.193-18.5211.68516.4713.465-6.779-2.613-18.668
113AA_U80G81:U95G96_AA-0.418-2.1924.0256.797-5.3818.142-3.0435.2934.08-15.935-20.13220.091
115AA_U82G83:C93A94_AA-0.62-1.5242.933-3.711-0.57429.762-2.8370.53.015-1.1137.18929.992

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.