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Volumn 102, Issue 26, 1998, Pages 5228-5233

Tautomerism of 1-methyl derivatives of uracil, thymine, and 5-bromouracil. Is tautomerism the basis for the mutagenicity of 5-bromouridine?

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EID: 84962469231     PISSN: 15206106     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp981005+     Document Type: Article
Times cited : (77)

References (66)
  • 1
    • 84962475472 scopus 로고
    • Blackburn, G. N., Gait, M. J., Eds.; IRL Press: Oxford, Chapter 2
    • (a) Blackburn, G. M. In Nucleic Acids in Chemistry and Biology; Blackburn, G. N., Gait, M. J., Eds.; IRL Press: Oxford, 1990; Chapter 2.
    • (1990) Nucleic Acids in Chemistry and Biology
    • Blackburn, G.M.1
  • 41
    • 84962431127 scopus 로고    scopus 로고
    • note
    • 3Br molecule. SCF values were corrected for basis set superposition error using the counterpoise method. A total of 15 configurations for the dimer, corresponding to different Br-O distances, were selected. The error in the location of the minima was 0.0 Å (in Br-O distance), the error at the minimum was 0.1 kcal/mol, and the rms error in the fitting was 0.5 kcal/mol.
  • 44
  • 46
    • 0004117434 scopus 로고    scopus 로고
    • Department of Chemistry, University of Toronto: Canda (version modified by Cammi, R.; Bonaccorsi, R.; Tomasi, J. in 1987 and by Luque, F. J.; Orozco, N. in 1995)
    • Peterson, M.; Poirier, R. MONSTERGAUSS; Department of Chemistry, University of Toronto: Canda (version modified by Cammi, R.; Bonaccorsi, R.; Tomasi, J. in 1987 and by Luque, F. J.; Orozco, N. in 1995).
    • MONSTERGAUSS
    • Peterson, M.1    Poirier, R.2
  • 58
    • 11544359134 scopus 로고
    • and references therein
    • (b) Leszcynski, J. J. Phys. Chem. 1992, 96, 1649 and references therein.
    • (1992) J. Phys. Chem. , vol.96 , pp. 1649
    • Leszcynski, J.1
  • 65
    • 84962475461 scopus 로고    scopus 로고
    • note
    • Poisson Boltzman calculations give only the electrostatic contribution to the solvation free energy. PB is probably less precise than MC-FEP or MST calculations owing to the use of a rigid geometry and a rigid and oversimplified expression of the solute charge distribution. It is not simple to compare PB with MC-FEP or MST calculations. But as a reference, the electrostatic contribution to the free energy of solvation computed from PB calculations for the N3 forms considered here ranges from -22 to -24 kcal/mol (∈ = 1 for solute) and from -12 to -13 kcal/mol (∈ = 2 for the solute). The equivalent MST estimates range between -15 and -17 kcal/ mol.


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