Nucleic Acid Standards
Sugar and Phosphate Constituents
Bond Lengths and Angles in the Phosphodiester Linkage in Dinucleoside Monophosphates and Trinucleoside Diphosphates
------------------------------------------ bond mean esd N value ------------------------------------------ P-O1P/O2P 1.485 (0.017, 30) P-O3' 1.607 (0.012, 13) P-O5' 1.593 (0.010, 15) (P)O5'-C5' 1.440 (0.016, 14) (P)O3'-C3' 1.433 (0.019, 13) ------------------------------------------ ------------------------------------------ angle mean esd N value ------------------------------------------ O1P-P-O2P 119.6 (1.5, 15) O5'-P-O1P/O2P large* 110.7 (1.2, 16) O5'-P-O1P/O2P small** 105.7 (0.9, 16) O3'-P-O5' 104.0 (1.9, 13) P-O5'-C5' 120.9 (1.6, 15) C3'-O3'-P 119.7 (1.2, 13) O3'-P-O1P/O2P large* 110.5 (1.1, 13) O3'-P-O1P/O2P small** 105.2 (2.2, 13) (P)O5'-C5'-C4' 109.4 (0.8, 14) (P)O3'-C3'-C4' 109.3 (1.5, 13) ----------------------------------------- *Geometries for the subset with large Ox-P-O1P/O2P angles, where x = 3' or 5'. **Geometries for the subset with small Ox-P-O1P/O2P angles, where x = 3' or5'.