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Volumn 107, Issue 39, 2003, Pages 7900-7910

Striving to understand the properties of universal nucleobases: A computational study of azole carboxamides

Author keywords

[No Author keywords available]

Indexed keywords

AZOLE CARBOXAMIDES; NUCLEOBASES;

EID: 0142040148     PISSN: 10895639     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp035000a     Document Type: Article
Times cited : (10)

References (107)
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  • 3
    • 0027081996 scopus 로고
    • Antisense Strategies; Baserga, R., Denhardt, D. T., Eds.
    • (b) Antisense Strategies; Baserga, R., Denhardt, D. T., Eds.; Ann. N.Y. Acad. Sci. 1992, 660, 1.
    • (1992) Ann. N.Y. Acad. Sci. , vol.660 , pp. 1
  • 7
    • 0035875112 scopus 로고    scopus 로고
    • For a review of the literature of universal bases (to 2000) including modifications considered and their applications, see Loakes, D. Nucleic Acids Res. 2001, 29, 2437-2447.
    • (2001) Nucleic Acids Res. , vol.29 , pp. 2437-2447
    • Loakes, D.1
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    • Lipkowitz, K. B., Boyd, D. B., Eds.; VCH Publishers: New York
    • (c) Scheiner, S. In Reviews in Computational Chemistry; Lipkowitz, K. B., Boyd, D. B., Eds.; VCH Publishers: New York, 1991; Vol. 2, p 165.
    • (1991) In Reviews in Computational Chemistry , vol.2 , pp. 165
    • Scheiner, S.1
  • 100
    • 0142037606 scopus 로고    scopus 로고
    • note
    • We note that the conformation of the X = Y = C, Z = N azole carboxamide that Johnson et al. refer to as anti corresponds to our syn-t conformer. For consistency, we use the same nomenclature for all azole carboxamides (Scheme 2).
  • 101
    • 0142037607 scopus 로고    scopus 로고
    • note
    • SCF(rel), Table 2, ref 25) indicate that the syn conformer is more stable. Our calculations indicate that the syn-t conformer is more stable for this azole carboxamide (Table 1).
  • 102
    • 0142132806 scopus 로고    scopus 로고
    • note
    • The glycosyl torsion angle (Χ) is defined as ∠(01'C1'N1C2) in pyrimidine and ∠(O1'C1'N9C4) in purine nucleotide. This dihedral angle ranges from 90 to 270° for the anti conformation typically found in A-DNA and B-DNA in right-handed and left-handed nucleic acid helices. χ varies between +90 and -90° for the syn orientation often found in left-handed (Z-form) helices of DNA and RNA. (See Saenger, W. Principles of Nucleic Acid Structure; Cantor, C. R., Ed.; Springer-Verlag: New York, 1984).
  • 103
    • 0142101102 scopus 로고    scopus 로고
    • note
    • We note that Klewer et al. report that molecular modeling of the X = Z = N, Y = CH azole carboxamide contained within a DNA duplex reveals that this molecule cannot adequately pair with adenine or cytosine.
  • 104
    • 0142132807 scopus 로고    scopus 로고
    • note
    • It should be noted that Klewer et al. report a conformational exchange about τ when the X = Z = N, Y = CH azole carboxamide is paired opposite guanine.
  • 105
    • 0142101101 scopus 로고    scopus 로고
    • note
    • It should also be noted that calculations predict that this azole carboxamide forms a distorted pair with adenine; therefore, binding to adenine is expected to be unfavorable.
  • 106
    • 0142132805 scopus 로고    scopus 로고
    • note
    • We note that cytosine interacts with the anti-τ conformer, which is slightly less stable that the syn-τ conformer that interacts with thymine. However, even if this energy difference is taken into account, the binding strength of the cytosine pair is still greater than that of the corresponding thymine pair.
  • 107
    • 0142037605 scopus 로고    scopus 로고
    • note
    • It should be noted that Klewer et al. suggested that differences in stabilities observed experimentally for the X = Z = N, Y = CH azole carboxamide may actually be due to differences in intrastrand sequences introduced by changing the pairing sequence.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.