Exploration of mechanisms for the transformation of 8-hydroxy guanine radical to FAPyG by density functional theory

BH Munk, CJ Burrows, HB Schlegel - Chemical research in …, 2007 - ACS Publications
The potential energy surface for the transformation of 8-hydroxy guanine radical to
formamidopyrimidine adducts via four pathways has been mapped out using B3LYP density …

Mechanism of action of sulforaphane as a superoxide radical anion and hydrogen peroxide scavenger by double hydrogen transfer: A model for iron superoxide …

AK Prasad, PC Mishra - The Journal of Physical Chemistry B, 2015 - ACS Publications
The mechanism of action of sulforaphane as a scavenger of superoxide radical anion (O2•–)
and hydrogen peroxide (H2O2) was investigated using density functional theory (DFT) in …

Formation of 8‐nitroguanine and 8‐oxoguanine due to reactions of peroxynitrite with guanine

NR Jena, PC Mishra - Journal of computational chemistry, 2007 - Wiley Online Library
Reactions of peroxynitrite with guanine were investigated using density functional theory
(B3LYP) employing 6‐31G** and AUG‐cc‐pVDZ basis sets. Single point energy calculations …

Influence of hydrogen bonds on the reaction of guanine and hydroxyl radical: DFT calculations in C (H+) GC motif

Y Wang, S Wei - Physical Chemistry Chemical Physics, 2024 - pubs.rsc.org
A comprehensive theoretical investigation was performed to illuminate the influence of
hydrogen bonds (H-bonds) on the obscure reaction of a hydroxyl radical (HO˙) and guanine …

Modeling the activity of glutathione as a hydroxyl radical scavenger considering its neutral non-zwitterionic form

A Yadav, PC Mishra - Journal of molecular modeling, 2013 - Springer
Glutathione is an immensely important antioxidant, particularly in the central nervous
system. The scavenging mechanism of glutathione towards the OH radical was studied …

· OH oxidation toward S-and OH-containing amino acids

J Uranga, JI Mujika, JM Matxain - The Journal of Physical …, 2015 - ACS Publications
The hydroxyl radical is the most reactive oxygen species, and it is able to attack
macromolecules such as proteins. Such oxidation processes are the cause of a number of …

[HTML][HTML] Gene-specific assessment of guanine oxidation as an epigenetic modulator for cardiac specification of mouse embryonic stem cells

J Park, JW Park, H Oh, FS Maria, J Kang, X Tian - PLoS One, 2016 - journals.plos.org
Epigenetics have essential roles in development and human diseases. Compared to the
complex histone modifications, epigenetic changes on mammalian DNA are as simple as …

Mechanism of Scavenging Action of N-Acetylcysteine for the OH Radical: A Quantum Computational Study

N Agnihotri, PC Mishra - The Journal of Physical Chemistry B, 2009 - ACS Publications
N-Acetylcysteine, a precursor of glutathione, is an effective antioxidant present in biological
systems. The mechanism of scavenging action of N-acetylcysteine for the OH radical was …

[HTML][HTML] Emerging role of oxidative stress on EGFR and OGG1-BER cross-regulation: Implications in thyroid physiopathology

C Moscatello, MC Di Marcantonio, L Savino, E D'Amico… - Cells, 2022 - mdpi.com
Thyroid diseases have a complex and multifactorial aetiology. Despite the numerous studies
on the signals referable to the malignant transition, the molecular mechanisms concerning …

Theoretical investigation of the ultrafast dissociation of ionised biomolecules immersed in water: Direct and indirect effects

MP Gaigeot, P Lopez-Tarifa, F Martin, M Alcami… - … Research/Reviews in …, 2010 - Elsevier
Theoretical simulations are particularly well suited to investigate, at a molecular level, direct
and indirect effects of ionising radiations in DNA, as in the particular case of irradiation by …