We demonstrate that a recombinase ribozyme achieves multiple functions in the same reaction network: self-reproduction, iterative elongation and circularization of other RNAs, leading to synthesis of diverse products predicted by a kinetic model. This shows that key mechanisms can be integrated and controlled toward Darwinian evolution in RNA reaction networks.
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http://dx.doi.org/10.1039/d1cc02290c | DOI Listing |
Methods Enzymol
January 2025
Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv, Israel. Electronic address:
A-to-I RNA editing is an RNA modification that alters the RNA sequence relative to the its genomic blueprint. It is catalyzed by double-stranded RNA-specific adenosine deaminase (ADAR) enzymes, and contributes to the complexity and diversification of the proteome. Advancement in the study of A-to-I RNA editing has been facilitated by computational approaches for accurate mapping and quantification of A-to-I RNA editing based on sequencing data.
View Article and Find Full Text PDFJ Extracell Vesicles
January 2025
Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland.
B cell maturation is crucial for effective adaptive immunity. It requires a complex signalling network to mediate antibody diversification through mutagenesis. B cells also rely on queues from other cells within the germinal centre.
View Article and Find Full Text PDFThe mammalian cortex is composed of a highly diverse set of cell types and develops through a series of temporally regulated events that build out the cell type and circuit foundation for cortical function. The mechanisms underlying the development of different cell types remain elusive. Single-cell transcriptomics provides the capacity to systematically study cell types across the entire temporal range of cortical development.
View Article and Find Full Text PDFInt J Mol Sci
December 2024
Agricultural College, Yanbian University, Yanji 133002, China.
A comprehensive genome-wide identification of SET-domain-containing genes in (tomato) has revealed 46 members. Phylogenetic analysis showed that these genes, along with those from and , are divided into five subfamilies, with Subfamilies II and V being the largest. Motif and domain analyses identified 15 conserved motifs and revealed the presence of pre-SET and post-SET domains in several genes, suggesting functional diversification.
View Article and Find Full Text PDFNat Commun
January 2025
Department of Obstetrics and Gynaecology, University of Cambridge, NIHR Cambridge Biomedical Research Centre, Cambridge, United Kingdom.
The placenta is the critical interface between mother and fetus, and consequently, placental dysfunction underlies many pregnancy complications. Placental formation requires an adequate expansion of trophoblast stem and progenitor cells followed by finely tuned lineage specification events. Here, using single-cell RNA sequencing of mouse trophoblast stem cells during the earliest phases of differentiation, we identify gatekeepers of the stem cell state, notably Nicol1, and uncover unsuspected trajectories of cell lineage diversification as well as regulators of lineage entry points.
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