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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'.

					

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