Henri Niskanen

@henriniskanen.bsky.social

Postdoc @ Hnisz lab | Max Planck Institute for Molecule Genetics, Berlin | Condensates & Gene regulation | Past: PhD (Molecular Medicine, Uni. East Finland) MSc (biochemistry, Uni. Turku)

I’m thrilled to share that my PhD work has been just published in Cell. After a long and bumpy ride, we uncovered the core function of nuclear speckles -splicing of GC-levelled exons- and traced the evolution of this gene architecture and condensates themselves to amniotes.

Graphical abstract: Speckle-proximal and speckle-dependent RNA has short introns, and simultaneous emergence of multiple exons requires heightened concentration of spliceosome components.
Speckle-independent RNA has long introns and can be spliced well with or without speckles
Speckle dependent introns evolved in amniotes. The reduction in intron length was accompanied by the increase of the intronic GC content, giving rise to GC-levelled intronic architecture. This exon-intron architecture is not present outside of amniotes (Fish, Invertebrates), and these organisms lack nuclear speckles.
Tugce Aktas@aktast.bsky.social · 5mo ago

Our most recent work on the “function and evolution” of #nuclear-speckles is now online at Cell @cp-cell.bsky.social doi.org/10.1016/j.ce... Read the thread👇 for the highlights of our findings.

⚠️ I am really excited to share the work of Anastasios Balaskas, an excellent PhD candidate in the lab, with the wider world. Tasos made a significant advance: generating a stem cell-based embryo model that contains both posterior and anterior neural tissues of the late-stage gastrulating embryo.

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A bottleneck for studying the biological function of biomolecular condensates is unavailability of tools to selectively probe them within living cells. @nature, researchers report one such tool, showcasing its use in various contexts including disease. www.nature.com/articles/s41...

Probing condensate microenvironments with a micropeptide killswitch - Nature

Targeting a non-natural micropeptide ‘killswitch’ to several biomolecular condensates altered condensate compositions and revealed condensate functions in human cells

nature.com