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Structure and function of the uracil DNA glycosylases from hyperthermophiles: Elucidating DNA uracil repair mechanisms: A review.
Int J Biol Macromol
January 2025
College of Environmental Science and Engineering, Yangzhou University, China. Electronic address:
Base deamination can lead to DNA base damage, among which cytosine deamination to uracil occurs frequently. Before repair, replication of uracil in DNA will generate GC → AT transversion mutation. Since base deamination is accelerated by high temperature, genomic DNA stability of hyperthermophiles, which grow optimally above 75 °C, is facing a severe threat by the elevated base deamination created by their living high temperature environments.
View Article and Find Full Text PDFComplete pathway elucidation of echinacoside in Cistanche tubulosa and de novo biosynthesis of phenylethanoid glycosides.
Nat Commun
January 2025
Modern Research Center for Traditional Chinese Medicine, Beijing Institute of Traditional Chinese Medicine, Beijing University of Chinese Medicine, 102488, Beijing, PR China.
Echinacoside (ECH), one of the most representative phenylethanoid glycosides (PhGs), has considerable neuroprotective effects and is an effective ingredient in numerous commercial drugs. Here, we elucidate the complete ECH biosynthetic pathway in the medicinal plant Cistanche tubulosa. In total, 14 related genes are cloned and functionally characterized.
View Article and Find Full Text PDF4-Pyridone-3-carboxamide-1-β-D-ribonucleoside Reduces Cyclophosphamide Effects and Induces Endothelial Inflammation in Murine Breast Cancer Model.
Int J Mol Sci
December 2024
Department of Biochemistry, Medical University of Gdansk, 80-211 Gdańsk, Poland.
4-pyridone-3-carboxamide-1-β-D-ribonucleoside (4PYR) is a nicotinamide derivative, considered a new oncometabolite. 4PYR formation induced a cytotoxic effect on the endothelium. Elevated blood 4PYR concentration was observed in patients with cancer.
View Article and Find Full Text PDFThe Antimicrobial Effects of Nitric Oxide: A Narrative Review.
Nitric Oxide
January 2025
Harvard Medical School, Boston, MA, USA; Division of Pediatric Critical Care Medicine, Massachusetts General Hospital for Children, Boston, MA, USA. Electronic address:
Nitric oxide (NO) is a versatile endogenous molecule with multiple physiological roles, including neurotransmission, vasodilation, and immune regulation. As part of the immune response, NO exerts antimicrobial effects by producing reactive nitrogen species (RNS). These RNS combat pathogens via mechanisms such as DNA deamination, S-nitrosylation of thiol groups, and lipid peroxidation, leading to disruptions in microbial cell membranes and vital protein functions.
View Article and Find Full Text PDFAPOBEC3A deaminates CTG hairpin loops to promote fragility and instability of expanded CAG/CTG repeats.
Proc Natl Acad Sci U S A
January 2025
Program in Genetics, Molecular, and Cellular Biology, Tufts University Graduate School of Biomedical Sciences, Boston, MA 02111.
CAG/CTG repeats are prone to expansion, causing several inherited human diseases. The initiating sources of DNA damage which lead to inaccurate repair of the repeat tract to cause expansions are not fully understood. Expansion-prone CAG/CTG repeats are actively transcribed and prone to forming stable R-loops with hairpin structures forming on the displaced single-stranded DNA (S-loops).
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