Biopolym. Cell. 2004; 20(1-2):62-70.
http://dx.doi.org/10.7124/bc.000692
Proton acceptor and proton donor properties of modified nucleotide bases and their complexing ability: quantum chemical investigation
1Potyahaylo A. L., 1Stepanyugin A. V., 1Samijlenko S. P., 1Hovorun D. M.
  1. Institute of Molecular Biology and Genetics, NAS of Ukraine
    150, Akademika Zabolotnoho Str., Kyiv, Ukraine, 03680

Abstract

Proton acceptor and proton donor properties of 40 modified nucleotide bases have been investigated by the AM1 semiempirical quantum chemical method, proven to be rather good for such tasks and matters. Based on the data obtained, the orders of the acidity and basicity have been built. The authors have also concluded about the character of self- and hetero-association of some modified nucleotide bases and their specific interactions with both neutral and deprotonated carboxylic groups of amino acids in vacuum. Biological significance of these findings is briefly discussed.
Full text: (PDF, in Ukrainian)

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