Biopolym. Cell. 1999; 15(6): 487-492.
Structure and Function of Biopolymers
Theoretical study of pyrimidine photohydrates and mechanism of mutagenic action of UV-light
1Danilov V. I., 2Alderfer J. L.
  1. Institute of Molecular Biology and Genetics, NAS of Ukraine
    150, Akademika Zabolotnoho Str., Kyiv, Ukraine, 03680
  2. Roswell Park Cancer Institute
    Elm and Carlton Str., Buffalo, New-York, USA, 14263

Abstract

The quantum mechanical study for the ground state of normal and rare tautomeric forms of pyrimidine bases and their photohydrates has been performed by means of multi-configurational SCF method in frame of semiempirical Hamiltonian AMI with full geometry optimization. Unlike the cytosine, it is detected that both rare hnino form conformations (trans and cys) of cytosine photohydrate are more stable than its normal amino form. Hydrution simulation of these compounds by the Monte Carlo method showed t/iai in the case of cytosine the water stabilizes more its amino form while in the case of cytosine photohydrate more stable becomes its imino form. The cytosine. photohydrate possesses an uracil similar structure, so it is able to form a base pair with adenine. As a result of G-C → A-T(U) or C → T(U) transitions occur during the nucleic-acids replicaton error. The data obtained serve an evidence that the tautomerism is a possible mechanism of UV-light mutagenic effect.

References

[1] Danilov VI, Kventsel GF Electronic submission to the theory of point mutations. Naukova Dumka, 1971; 51-55.
[2] Drake J.W. Properties of ultraviolet-induced rll mutants of bacteriophage T4. J. Mol. Biol, 1963; 6(4):268-283.
[3] Howard B.D., Tessman I. Identification of the altered bases in mutated single-stranded DNA. 3. mutagenesis by ultraviolet light. J Mol Biol. 1964;9:372-5.
[4] Witkin E.M. Radiation-induced mutations and their repair. Science. 1966;152(3727):1345-53.
[5] Yanofsky C, Drapeau GR, Guest JR, Carlton BC. The complete amino acid sequence of the tryptophan synthetase A protein (? subunit) and its colinear relationship with the genetic map of the A gene. Proc Natl Acad Sci U S A. 1967;57(2):296-8.
[6] Remsen JF, Cerutti PA. Ultraviolet inactivation and miscoding of irradiated R17-RNA in vitro. Biochem Biophys Res Commun. 1972;48(2):430-6.
[7] Meistrich ML, Drake JW. Mutagenic effects of thymine dimers in bacteriophage T4. J Mol Biol. 1972;66(1):107-14.
[8] Johns H.E., Leblanc J.C., Freeman K.B. Reversal and deamination rates of the main ultraviolet of cytidylie acid. J. Mol. Biol, 1965; 13(3):849-861.
[9] Freeman K.B., Harihuran P.V., Johns H.E. The Ultraviolet photochemistry of cylidylyl-(3'-5')-cytidine. J. Mol. Biol. 1965; 13(3):833-848.
[10] Dyadyuish FG, Danilov VI, Shramko OV. Electronic aspects of mechanisms lethal and mutagenic action of UV light. Mol. Biol. 1967; 1539-1543.
[11] Grossman L. Studies on mutagenesis induced in vitro. Photochem. Phoiobiol. 1968; 7(6):727-735.
[12] Vanderhoek JY, Cerutti PA. The stability of deoxycytidine photohydrates in the mononucleotide, oligodeoxynucleotides and DNA. Biochem Biophys Res Commun. 1973;52(4):1156-61.
[13] Brown D.M., Hewlins M.J.E. Dihydrocytosine and related compounds. Journal of the Chemical Society C: Organic, 1968:2050-2055.
[14] Danilov VI, Kventsel GF. Electronic submission to the theory of point mutations. Kiev: Naukova Dumka, 1971. 34-39.
[15] Miller N, Cerutti P. Structure of the photohydration products of cytidine and uridine. Proc Natl Acad Sci U S A. 1968;59(1):34-8.
[16] Fisher G.J., Johns H.E. Thymine hydrate formed by ultraviolet and gamma irradiation of aqueous solutions () Photochemistry and Photobiology, 1973; 18 (1):23-27.
[17] Stewart, J.J.P. MOPAC 93 MANUAL:Fujitsu Limited.Tokyo 1993, pp. 1-378.
[18] Les A., Adamowicz L., Bartlett R.J. Relative stability of cytosine tautomers with the coupled cluster method and first-order correlation orbitals. Journal of Physical Chemistry, 1989 93 (10):4001-4005.
[19] Les A., Adamowicz L. Oxo-hydroxy tautomerism of uracil and 5-fluorouracil. Journal of Physical Chemistry, 1989;93 (20):7078-7081.
[20] Scanlan M.J., Hillier I.H. An ab initio study of tautomerism of uracil, thymine, 5-fluorouracil, and cytosine. Journal of the American Chemical Society, 1984; 106 (13):3737-3745.
[21] Kwiatkowski J.S., Bartlett R.J., Person W.B. Contributions from electron correlation to the relative stabilities of the tautomers of nucleic acid bases. Journal of the American Chemical Society, 1988; 110 (8):2353-2358.
[22] Person W.B., Szczepaniak K., Szczesniak M., Kwiatkowski J.S., Hernandez L., Czerminski R. Tautomerism of nucleic acid bases and the effect of molecular interactions on tautomeric equilibria. Journal of Molecular Structure, 1989; 194 (C):239-258.
[23] Adamowicz L. Determination of the relative stability of fluorocytosine tautomers with single and double excitation coupled-cluster (CCSD) method. Chemical Physics Letters, 1988; 153 (2-3), pp. 147-152.
[24] Metropolis N, Rosenbluth AW, Rosenbluth MN, Teller AH, Teller E. Equation of State Calculations by Fast Computing Machines. J Chem Phys. 1953;21(6):1087-92.
[25] Lee J, Barker JA, Abraham FF. Theory and Monte Carlo simulation of physical clusters in the imperfect vapor. J Chem Phys. 1973; 58(8):3166-80.
[26] Abraham F.F. Monte Carlo simulation of physical clusters of water molecules. J Chem Phys. 1974; 61(3):1221-5.
[27] Mruzik MR, Abraham FF, Schreiber DE, Pound GM. A Monte Carlo study of ion-water clusters. J Chem Phys. 1976; 64(2):481-91.
[28] Alderfer JL, Danilov VI, Poltev VI, Slyusarchuk ON. A study of the hydration of deoxydinucleoside monophosphates containing thymine, uracil and its 5-halogen derivatives: Monte Carlo simulation. J Biomol Struct Dyn. 1999;16(5):1107-17.
[29] Wang S.Y., Nnadi J.C. Mechanism for the photohydration of pyrimidines.Chemical Communications (London), 1968;(19):1160-1162.
[30] Wang S.Y. A «hot» ground state intermediate in the photohydration of pyrimidines.Excited states in organic chemistry and biochemistry. Dordrecht:D. Reidel Publ.Comp, Eds B. Pullman, N. Goldblum 1977; 39-52.
[31] Fisher G.J., Johns H.E. Pyrimidine Photohydrates. Photochem. and Photobiol. of Nucl. Acids. Chemistry, Ed. S.H. Wang.New York:Acad,press 1, pp. 169-224.
[32] Grossman L, Rodgers E. Evidence for the presence of cytosine photohydrates in UV irradiated nucleic acids. Biochem Biophys Res Commun. 1968;33(6):975-83.
[33] Cieplak P., Bash P., Singh U.C., Kollman P.A. A theoretical study of tautomerism in the gas phase and aqueous solution: A combined use of "state-of-the-art" ab initio quantum mechanics and free energy perturbation methods.Journal of the American Chemical Society, 1987; 109 (21), pp. 6283-6289.