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Conformational Studies of (2'-5') Polynucleotides: Theoretical Computations of Energy, Base Morphology, Helical Structure, and Duplex Formation

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Specialty Biochemistry
Date 1986 Jul 11
PMID 2426656
Citations 6
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Abstract

A detailed theoretical analysis has been carried out to probe the conformational characteristics of (2'-5') polynucleotide chains. Semi-empirical energy calculations are used to estimate the preferred torsional combinations of the monomeric repeating unit. The resulting morphology of adjacent bases and the tendency to form regular single-stranded structures are determined by standard computational procedures. The torsional preferences are in agreement with available nmr measurements on model compounds. The tendencies to adopt base stacked and intercalative geometries are markedly depressed compared to those in (3'-5') chains. Very limited families of regular monomerically repeating single-stranded (2'-5') helices are found. Base stacking, however, can be enhanced (but helix formation is at the same time depressed) in mixed puckered chains. Constrained (2'-5') duplex structures have been constructed from a search of all intervening glycosyl and sugar conformations that form geometrically feasible phosphodiester linkages. Both A- and B-type base stacking are found to generate non-standard backbone torsions and mixed glycosyl/sugar combinations. The 2'- and 5'-residues are locked in totally different arrangements and are thereby prevented from generating long helical structures.

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References
1.
Brahms J, Maurizot J, MICHELSON A . Conformational stability of dinucleotides in solution. J Mol Biol. 1967; 25(3):481-95. DOI: 10.1016/0022-2836(67)90200-8. View

2.
Doornbos J, Charubala R, Pfleiderer W, Altona C . Conformational analysis of the trinucleoside diphosphate 3'd(A2'-5'A2'-5'A). An NMR and CD study. Nucleic Acids Res. 1983; 11(13):4569-82. PMC: 326065. DOI: 10.1093/nar/11.13.4569. View

3.
Adler A, Grossman L, Fasman G . Circular dichroism of cytosine dinucleoside monophosphates containing arabinose, ribose, and deoxyribose. Biochemistry. 1968; 7(11):3836-41. DOI: 10.1021/bi00851a008. View

4.
Sulston J, Lohrmann R, Orgel L, Weimann B, Miles H . Non-enzymic oligonucleotide synthesis on a polycytidylate template. J Mol Biol. 1969; 40(2):227-34. DOI: 10.1016/0022-2836(69)90471-9. View

5.
WARSHAW M, Cantor C . Oligonucleotide interactions. IV. Conformational differences between deoxy- and ribodinucleoside phosphates. Biopolymers. 1970; 9(9):1079-103. DOI: 10.1002/bip.1970.360090910. View