Cited by 19DNA and Nucleic Acid ChemistryDNA Repair MechanismsProtein Structure and Dynamics

The solution structure of DNA decamer duplex containing the Dewar product of thymidylyl(3-5')thymidine by NMR and full relaxation matrix refinement

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Lee, Joon-Hwa, Hwang, Geum-Sook, Kim, Jong-Ki, Choi, Byong-Seok·1998·FEBS Letters

Abstract

The (6‐4) adducts and their Dewar isomers play an important role in cytotoxicity and mutation in skin cells exposed to sunlight. Structural study of the DNA duplex containing a site‐specific photoproduct is an essential step toward understanding the molecular mechanism of the mutagenesis and the repair activity of UV‐irradiated DNA. Here we use 1 H NMR spectroscopy and full relaxation matrix refinement to investigate the solution structure of the duplex Dewar decamer. We find that the isomerization of the (6‐4) adduct to its Dewar form induces a substantial change in overall structure of the oligonucleotide duplex. Contrasting base stacking of two lesion sites results in a large difference in the structural impacts induced by the two photoproducts, such as differential disruption of hydrogen bonding at the lesion sites and overall helical bending of 44° by the (6‐4) lesion and 21° by the Dewar lesion.

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Crossref · 10.1016/s0014-5793(98)00508-0

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  • Dewar valence isomers induce an intermediate distortion in DNA structure of 21 degrees compared to CPDs at 10 degrees and 6-4PPs at 44 degrees.

    “Dewar valence isomers induce an intermediate distortion in DNA structure (21 degrees) compared to CPDs (10 degrees) and 6-4PPs (44 degrees) [35].”

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Research works printed but not linked: 2

  1. Bru ë nger, A.T. (1992) X-PLOR Version 3.1, Yale University Press, New Haven, CT.
  2. LeClerc, J.E., Borden, A. and Lawrence, C.W. (1991) Proc. Natl. Acad. Sci. USA 88, 9685^9689.

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Authors
Lee, J.-H., Hwang, G.-S., Kim, J.-K., & Choi, B.-S.
Affiliations
  • Korea Advanced Institute of Science and Technology (KR)
  • Daegu Catholic University (KR)
Corresponding author
Choi, Byong-Seok
Venue
FEBS Letters
Publisher
Wiley
Published
1998-05-29
Volume
428
Issue
3
Pages
269-274
ISSN
  • 0014-5793 (ISSN-L)
  • 1873-3468
OpenAlex
W2052831715
Cited by
19
References
20
Citations by year
2022: 1 · 2021: 1 · 2020: 1 · 2017: 1 · 2015: 1 · 2014: 1
FWCI
0.70
Type
journal article
Language
en
Open access
Locations
  • FEBS Letters (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Seoul National University
  • Korea Science and Engineering Foundation
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA and Nucleic Acid Chemistry
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
Keywords
Dewar isomers, DNA photoproducts, UV mutagenesis, base stacking, hydrogen bond breaking
MeSH terms
Base Composition, DNA, Models, Molecular, Nucleic Acid Conformation, Oligodeoxyribonucleotides, Skin, Solutions, Sunlight, Ultraviolet Rays, Dinucleoside Phosphates, DNA Adducts, Nuclear Magnetic Resonance, Biomolecular

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