ArticleProceedings of the National Academy of Sciences of the United States of America2025
Transcription-templated assembly of the nucleolus in the
Article in Proceedings of the National Academy of Sciences of the United States of America, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Muscular dystrophy-associated lamin variants disrupt cellular organization through a nucleolar-ribosomal axis.Science advances · 2026Article
- Nuclear envelope-dependent heterochromatin positioning gates the timing of nucleolar assembly in the early embryo.bioRxiv : the preprint server for biology · 2026Article
- Dynamics of synthetic transcriptional condensates emerge from RNA synthesis and degradation.bioRxiv : the preprint server for biology · 2026Article
- Nucleolar expansion: A biomolecular condensate mortality timer.Geromedicine · 2026Article
- Muscular dystrophy-associated lamin variants disrupt cellular organization through a nucleolar-ribosomal axis controlling cytoplasmic macromolecular crowding.bioRxiv : the preprint server for biology · 2025Article
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Abstract
The nucleolus is a multicomponent structure made of RNA and proteins that serves as the site of ribosome biogenesis within the nucleus. It has been extensively studied as a prototype of a biomolecular condensate whose assembly is driven by phase separation. While the steady-state size of the nucleolus is quantitatively accounted for by the thermodynamics of phase separation, we show that experimental measurements of the assembly dynamics are inconsistent with a simple model of a phase-separating system relaxing to its equilibrium state. Instead, we show that the dynamics are well described by a model in which the transcription of ribosomal RNA actively drives nucleolar assembly. We find that our model of active transcription-templated assembly quantitatively accounts for the rapid kinetics observed in early embryos at different developmental stages, and for different RNA interference (RNAi) perturbations of embryo size. Our model predicts a scaling of the time to assembly with the volume of the nucleus to the one-third power, which is confirmed by experimental data. Our study highlights the role of active processes such as transcription in controlling the placement and timing of assembly of membraneless organelles.
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