Results 21 to 30 of about 6,161 (198)

Structural and Molecular Basis for Mitochondrial DNA Replication and Transcription in Health and Antiviral Drug Toxicity

open access: yesMolecules, 2023
Human mitochondrial DNA (mtDNA) is a 16.9 kbp double-stranded, circular DNA, encoding subunits of the oxidative phosphorylation electron transfer chain and essential RNAs for mitochondrial protein translation.
Joon Park   +2 more
doaj   +1 more source

Synthesis of Disaccharide Nucleosides Utilizing the Temporary Protection of the 2′,3′-cis-Diol of Ribonucleosides by a Boronic Ester

open access: yesMolecules, 2017
Disaccharide nucleosides are an important class of natural compounds that have a variety of biological activities. In this study, we report on the synthesis of disaccharide nucleosides utilizing the temporary protection of the 2′,3′-cis-diol of ...
Hidehisa Someya, Taiki Itoh, Shin Aoki
doaj   +1 more source

Nucleobase Protection of Deoxyribo‐ and Ribonucleosides [PDF]

open access: yesCurrent Protocols in Nucleic Acid Chemistry, 2017
AbstractOligonucleotides carrying a variety of chemical modifications including conjugates are finding increasing applications in therapeutics, diagnostics, functional genomics, proteomics, and as research tools in chemical and molecular biology. The successful synthesis of oligonucleotides primarily depends on the use of appropriately protected ...
Geeta, Meher   +2 more
openaire   +5 more sources

Unnatural Amino Acid and Emerging Chemistry Approaches to Map RNA–Protein Interactions

open access: yesAngewandte Chemie, EarlyView.
This review highlights emerging chemistries for mapping RNA–protein interactions, including genetically encoded unnatural amino acids, novel photocrosslinkers, and non‐photoactivatable crosslinking systems. We compare their mechanisms, reactivity and applications, outlining how these next‐generation tools enable higher‐resolution, site‐specific ...
Eryn Lundrigan   +3 more
wiley   +2 more sources

Identification of N6,N6-Dimethyladenosine in Transfer RNA from Mycobacterium bovis Bacille Calmette-Guérin

open access: yesMolecules, 2011
There are more than 100 different ribonucleoside structures incorporated as post-transcriptional modifications, mainly in tRNA and rRNA of both prokaryotes and eukaryotes, and emerging evidence suggests that these modifications function as a system in ...
Peter C. Dedon   +8 more
doaj   +1 more source

Biomimetic Ketone Reduction by Disulfide Radical Anion

open access: yesMolecules, 2021
The conversion of ribonucleosides to 2′-deoxyribonucleosides is catalyzed by ribonucleoside reductase enzymes in nature. One of the key steps in this complex radical mechanism is the reduction of the 3′-ketodeoxynucleotide by a pair of cysteine residues,
Sebastian Barata-Vallejo   +5 more
doaj   +1 more source

Ribonucleosides, Aminoacyl- and Peptidyl-RNA: Synthesis, Thermodynamics, and Structure

open access: yesCHIMIA, 1999
Ribonucleosides, RNA and peptides are prepared to study non-covalent interactions of RNA, aminoacyl- and peptidyl-RNA. Techniques used include chemical synthesis in solution and on solid supports, UV- and NM-detected thermal denaturation, X-ray ...
Ewa Biala   +3 more
doaj   +1 more source

Evaluation of the level of 5'-nucleotidase and some biochemical parameters in the sera of beta-thalassemia patients

open access: yesTikrit Journal of Pure Science, 2023
One of the hydrolytic enzymes that catalyzes the hydrolysis of 5' -nucleotides into ribonucleosides and phosphate is the 5'nucleotidase, which is found in several organs.
Sameer M. Al-Gorany   +1 more
doaj   +1 more source

Synthesis of New 1,2,3-Triazol-4-yl-quinazoline Nucleoside and Acyclonucleoside Analogues

open access: yesMolecules, 2014
In this study, we describe the synthesis of 1,4-disustituted-1,2,3-triazolo-quinazoline ribonucleosides or acyclonucleosides by means of 1,3-dipolar cycloaddition between various O or N-alkylated propargyl-quinazoline and 1'-azido-2',3',5'-tri-O ...
Abdelaaziz Ouahrouch   +4 more
doaj   +1 more source

Synthesis and Antiviral Evaluation of 5-(4-Aryl-1,3-butadiyn-1-yl)-uridines and Their Phosphoramidate Pronucleotides

open access: yesMolecules
The emergence of RNA viruses driven by global population growth and international trade highlights the urgent need for effective antiviral agents that can inhibit viral replication.
Evan Saillard   +4 more
doaj   +1 more source

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