Cited by 113Photochemistry and Electron Transfer StudiesDNA and Nucleic Acid ChemistryPhotodynamic Therapy Research Studies

The Triplet Energy of Thymine in DNA

Bosca, Francisco, Lhiaubet-Vallet, Virginie, Cuquerella, M. Consuelo, Castell, Jose V., Miranda, Miguel A.·2006·Journal of the American Chemical Society

Abstract

Norfloxacin (NFX) photosensitizes formation of thymine dimers (T<>T) in DNA, while its N(4') acetyl derivative (ANFX) does not. This is evident from the observation of single-strand breaks after enzymatic treatment with T4 endonuclease V and subsequent gel electrophoresis. The triplet energies of NFX and ANFX are estimated at 273 and 268 kJ/mol, respectively, on the basis of triplet-triplet energy transfer quenching by a set of biphenyl and naphthalene derivatives. Hence, the triplet energy of thymine in DNA (i.e., the value for a photosensitizer to produce T<>T) can be estimated at 270 kJ/mol.

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Crossref · 10.1021/ja060651g

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  • The decrease of about 43 kJ mol^-1 in thymine triplet energy in DNA relative to the isolated base is suggested to result from pi-stacking and base pairing in DNA.

    “The decrease by about 43 kJ mol )1 of the thymine E T value with respect to that of the isolated base was suggested to result from the occurrence of p-stacking and base pairing in DNA (92).”

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Authors
Bosca, F., Lhiaubet-Vallet, V., Cuquerella, M. C., Castell, J. V., & Miranda, M. A.
Affiliations
  • Instituto de Tecnología Química UPV-CSIC, Universidad Politécnica de Valencia, Avda de los Naranjos s/n, 46022 Valencia, Spain, and Centro de Investigacion, Hospital Universitario La Fe, Avenida de Campanar 21, 46009 Valencia, Spain
  • Consejo Superior de Investigaciones Científicas (ES)
Venue
Journal of the American Chemical Society
Published
2006-04-25
Volume
128
Issue
19
Pages
6318-6319
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W1981306353
Cited by
113
References
18
Citations by year
2026: 3 · 2025: 5 · 2024: 5 · 2023: 5 · 2022: 1 · 2021: 5 · 2020: 3 · 2019: 4 · 2018: 5 · 2017: 5 · 2016: 7 · 2015: 10 · 2014: 5 · 2013: 7 · 2012: 10
FWCI
3.55
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of the American Chemical Society (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Physical Sciences › Chemistry › Physical and Theoretical Chemistry › Photochemistry and Electron Transfer Studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA and Nucleic Acid Chemistry
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Photodynamic Therapy Research Studies
Keywords
norfloxacin, thymine dimers, DNA photodamage, photosensitizers, triplet-triplet energy transfer, quenching, T4 endonuclease V, single-strand breaks, biphenyl derivatives, naphthalene derivatives
MeSH terms
DNA, Energy Transfer, Norfloxacin, Nucleic Acid Conformation, Thymine, Photosensitizing Agents, Dimerization

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