Results 41 to 50 of about 139,089 (266)

Quantum-сhemical analysis of geometric and energetic characteristics of hetero associates m9Ade•m1Ura in main tautomeric form

open access: yesБіологічні студії, 2015
For the first time, on the quantum-mechanical level of theory MP2/6-311++G(2df,pd)//B3LYP/6-311++G(d,p), a full set of hydrogen (H)-bonded hetero associates m9Ade·m1Ura in the main tautomeric forms consisting of 18 different structures was obtained ...
D. Plodnik, I. Voiteshenko, D. Hovorun
doaj   +1 more source

Architecturally diverse proteins converge on an analogous mechanism to inactivate Uracil-DNA glycosylase [PDF]

open access: yes, 2013
Uracil-DNA glycosylase (UDG) compromises the replication strategies of diverse viruses from unrelated lineages. Virally encoded proteins therefore exist to limit, inhibit or target UDG activity for proteolysis.
A. R. Cole   +39 more
core   +1 more source

Viruses with U-DNA: New Avenues for Biotechnology

open access: yesViruses, 2021
Deoxyuridine in DNA has recently been in the focus of research due to its intriguing roles in several physiological and pathophysiological situations. Although not an orthodox DNA base, uracil may appear in DNA via either cytosine deamination or thymine ...
Kinga K. Nagy   +2 more
doaj   +1 more source

Synthesis of 5-substituted 2'-deoxyuridine-5'-phosphonate analogues and evaluation of their antiviral activity [PDF]

open access: yes, 2012
A small series of 5-(hetero)aryl-modified nucleoside phosphonates was synthesized via an 8-step procedure including a Wittig reaction and Suzuki-Miyaura coupling.
Balzarini, Jan   +4 more
core   +1 more source

Comparative Study of the Gas-phase Cyclodimer Formations of Uracil and 6-azauracil in Excited State and Through Conical Intersections S0/S1

open access: yesActa Chimica Slovenica, 2018
The photocyclodimerization mechanisms of two oxo tautomers of uracil and 6-azauracil were studied at the CC2 level of theory and cc-pVDZ basis functions.
Pavlina Bogomilova Kancheva   +1 more
doaj   +1 more source

Pyrimidine salvage in Toxoplasma gondii as a target for new treatment

open access: yesFrontiers in Cellular and Infection Microbiology, 2023
Toxoplasmosis is a common protozoan infection that can have severe outcomes in the immunocompromised and during pregnancy, but treatment options are limited.
Hamza A. A. Elati   +6 more
doaj   +1 more source

Non-Empirically Tuned Range-Separated DFT Accurately Predicts Both Fundamental and Excitation Gaps in DNA and RNA Nucleobases [PDF]

open access: yes, 2012
Using a non-empirically tuned range-separated DFT approach, we study both the quasiparticle properties (HOMO-LUMO fundamental gaps) and excitation energies of DNA and RNA nucleobases (adenine, thymine, cytosine, guanine, and uracil).
Foster, Michael E., Wong, Bryan M.
core   +2 more sources

Single-strand selective monofunctional uracil-DNA glycosylase (SMUG1) deficiency is linked to aggressive breast cancer and predicts response to adjuvant therapy [PDF]

open access: yes, 2013
Uracil in DNA is an important cause of mutagenesis. SMUG1 is a uracil DNA glycosylase that removes uracil through base excision repair. SMUG1 also processes radiation induced oxidative base damage as well as 5-fluorouracil incorporated into DNA during
Abdel-Fatah, TMA   +9 more
core   +1 more source

Structure of isolated biomolecules by electron diffraction-laser desorption: uracil and guanine [PDF]

open access: yes, 2009
We report the structure of isolated biomolecules, uracil and guanine, demonstrating the capability of a newly developed electron diffraction apparatus augmented with surface-assisted IR laser desorption.
Gahlmann, Andreas   +2 more
core   +1 more source

Synthesis of Uracil-Iodonium(III) Salts for Practical Utilization as Nucleobase Synthetic Modules

open access: yesMolecules, 2019
Iodonium(III) salts bearing uracil moieties have recently appeared in the literature, but their structural scope and utilization are limited because of their hygroscopic characteristics.
Naoko Takenaga   +6 more
doaj   +1 more source

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