Display options
Cite
Moura TA, Junior RLR, Rocha MS. Caffeine modulates the intercalation of drugs on DNA: A study at the single molecule level. Biophys Chem. 2021;277:106653doi: 10.1016/j.bpc.2021.106653.
Moura, T. A., Junior, R. L. R., & Rocha, M. S. (2021). Caffeine modulates the intercalation of drugs on DNA: A study at the single molecule level. Biophysical chemistry, 277106653. https://doi.org/10.1016/j.bpc.2021.106653
Moura, T A, et al. "Caffeine modulates the intercalation of drugs on DNA: A study at the single molecule level." Biophysical chemistry vol. 277 (2021): 106653. doi: https://doi.org/10.1016/j.bpc.2021.106653
Moura TA, Junior RLR, Rocha MS. Caffeine modulates the intercalation of drugs on DNA: A study at the single molecule level. Biophys Chem. 2021 Oct;277:106653. doi: 10.1016/j.bpc.2021.106653. Epub 2021 Jun 29. PMID: 34217911.
Copy Download .nbib Format: NLM
Share it on

Biophys Chem. 2021 Oct;277:106653. doi: 10.1016/j.bpc.2021.106653. Epub 2021 Jun 29.

Caffeine modulates the intercalation of drugs on DNA: A study at the single molecule level.

Biophysical chemistry

T A Moura, R L R Junior, M S Rocha

Affiliations

  1. Departamento de Física, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil.
  2. Departamento de Física, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil. Electronic address: [email protected].

PMID: 34217911 DOI: 10.1016/j.bpc.2021.106653

Abstract

We use optical tweezers to characterize the ability of Caffeine (Caf) to modulate the intercalation of drugs into the DNA double-helix at the single molecule level. When previously bound to the double-helix, Caf hinders ethidium bromide (EtBr) intercalation, decreasing its effective equilibrium binding constant with DNA. The dominant mechanism of such singular ability is a direct binding of Caf to the intercalating drugs in solution, which decreases the effective concentration of such compounds available to interact with DNA. When EtBr intercalation into the DNA double-helix occurs firstly, on the other hand, the measured cooperativity between Caf molecules interacting with DNA can be modulated, a feature also correlated to the Caf-EtBr interaction in solution. The results achieved here unveil many peculiarities about the details of such interactions at the molecular level and provide new insights on the use of Caf in therapeutic applications.

Copyright © 2021 Elsevier B.V. All rights reserved.

Keywords: Caffeine; DNA; Intercalators; Single molecule force spectroscopy

Publication Types