Author: Oannes Biotech
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ESCRT-III is, by any conventional account, a specialist in membranes rather than nucleic acids. A membrane-remodeling complex, it is best known for sealing the nuclear envelope at the close of cell division and for severing the last cytoplasmic thread linking two newly formed daughter cells. A study published in July 2026 in Nature Structural &…
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Guanine-rich DNA can fold back on itself into four-stranded knots called G-quadruplexes, or G4s — structures that help regulate gene expression and telomere biology but that stall replication forks if left unresolved. The helicase FANCJ is one of the cell’s principal G4-resolving enzymes, and its gene doubles as a Fanconi anemia locus and a hereditary…
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GPR84 belongs to a peculiar category of cell-surface receptors: it is an orphan G protein–coupled receptor (GPCR), meaning that although it is known to respond to medium-chain fatty acids released during metabolic and inflammatory stress, its physiological ligand repertoire remains only partially defined. Expressed predominantly on macrophages, neutrophils, and other cells of the innate immune…
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An Ancient Alarm: Bacterial Schlafen Proteins Reveal a Deep Evolutionary Root for Antiviral Immunity
In mammalian cells, the Schlafen family of enzymes is known for an unusually drastic antiviral defense: when a virus invades, certain Schlafen nucleases shut down protein synthesis by shredding the cell’s own transfer RNAs (tRNAs), starving the pathogen of the machinery it needs to replicate. Whether bacteria, which pioneered CRISPR-based immunity long before animals existed,…
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Life’s molecular motors — myosin hauling cargo through muscle fibres, kinesin ferrying vesicles along microtubules, the ribosome translating messenger RNA one codon at a time — convert chemical energy into directed mechanical work with a precision and efficiency that synthetic systems have long struggled to approach. Building an artificial equivalent entirely from proteins, rather than…
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For more than two centuries, naturalists have marvelled at the intricately shaped shells that tintinnid ciliates — planktonic, single-celled eukaryotes comprising roughly a thousand species — assemble from material secreted directly into the surrounding water within minutes, and yet the molecular identity of this material has remained entirely unresolved. A study published in June 2026…
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One of the most persistent challenges in gene and cell therapy is not simply delivering a therapeutic gene to the right cell — it is ensuring that, once delivered, the gene’s expression can be turned on and off with sufficient precision to remain both safe and effective over time. Current inducible systems, which allow researchers…
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Among the countless molecular transactions that sustain life, few are as consequential — or as easily overlooked — as the quiet, continuous work of DNA repair. Each day, every cell in the human body is subjected to a barrage of chemical insults that introduce errors into its genomic sequence; left unattended, even a single misincorporated…
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Transfer RNA is among the most chemically decorated molecules in the cell — an average human tRNA carries more than a dozen distinct post-transcriptional modifications, each one placed with exquisite precision to fine-tune its performance on the ribosome. Among these, the family of 5-carboxymethyluridine (cm⁵U) modifications at the wobble position of the anticodon holds particular…
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Among the more than 150 chemically distinct modifications that have been identified in cellular RNA, 5-methylcytosine — abbreviated m5C — has long occupied an ambiguous position in the landscape of epitranscriptomics. Present in transfer RNAs, messenger RNAs, and several non-coding RNA species, m5C is deposited by a family of enzymes whose biological importance has become…