Nikita Frolov 🇺🇦

@nikitaphysics.bsky.social

Physicist interested in complex living systems @lendertgelens.bsky.social Lab, KU Leuven Complex Systems | Systems Biology

📢🚨 We're hiring! Join my new computational biophysics team at @BirkbeckUoL to study the biomechanics of the kinetochore-microtubule complex using all-atom and coarse-grained MD. 24-month postdoc, London-based. Apply by 7th July: www.jobs.ac.uk/job/DRV016/p...

Postdoctoral Researcher at Birkbeck, University of London

Discover an exciting academic career path as a Postdoctoral Researcher at jobs.ac.uk. Don't miss out on this job opportunity - apply today!

jobs.ac.uk

1/35 New preprint! We show that obligate multicellularity removes fundamental population genetic barriers to multicellular adaptation. Even a brief unicellular phase can dramatically constrain the evolution of beneficial multicellular traits. www.biorxiv.org/content/10.6...

Obligate multicellularity circumvents population genetic barriers to collective-level adaptation

Complex multicellularity has evolved in just five lineages (animals, plants, brown algae, red algae, and fungi) and in each case, these organisms develop clonally and are obligately multicellular. While prior work has shown that clonal development plays a critical role in the evolution of complex multicellularity, none has disentangled this from the impact of obligate vs facultative multicellular life cycles. Here we use experimental evolution with engineered snowflake yeast ( Saccharomyces cerevisiae ) to directly test how life cycle structure affects multicellular adaptation. We created isogenic strains capable of switching between unicellular and clonal multicellular phases, then evolved populations for 192 days under obligately multicellular, facultatively multicellular, and obligately unicellular regimes. Obligately multicellular populations rapidly evolved larger size, primarily driven by a whole genome duplication, in all five replicates. Facultative populations showed dramatically constrained evolution, with tetraploidy evolving in only 2/10 facultative populations despite experiments demonstrating that it is strongly beneficial across the full life cycle. Mathematical modeling reveals the mechanistic basis for this constraint: facultative life cycles create establishment barriers through two population genetic effects. Group formation dramatically reduces the number of units of selection, making beneficial multicellular mutations vulnerable to drift. This asymmetry in population size between life cycle phases also allows cell-level selection to overpower group-level selection, eliminating mutations that provide group-level benefits but carry cell-level costs. These findings demonstrate that obligate multicellularity circumvents fundamental population genetic barriers to collective-level adaptation, helping explain why complex multicellularity has evolved exclusively in obligately multicellular lineages, and suggesting similar constraints may operate in other evolutionary transitions in individuality. ### Competing Interest Statement The authors have declared no competing interest. U.S. National Science Foundation, https://ror.org/021nxhr62, DEB-1845363 Howard Hughes Medical Institute Gilliam Fellowship National Science Foundation Graduate Research Fellowship

biorxiv.org

Summer is coming, but how will you maximize your picnic space when everyone else is doing the same? In our new preprint, we show that branched cells may have an elegant solution: As cells grow and repel neighbors, they don't just cover space, but reach a hidden order called hyperuniformity! 🧪⚛️

How can we measure increased productivity of scientists, as a whole, whether from more AI, more funding or other measures, if the total number of Nature papers per week always stays the same?

New Perspective form Rory Maizels & me: "Gene regulatory networks: from correlative models to causal explanations" Gene regulatory networks are supposed to give us mechanistic explanations of development, so why are we drowning in 'hairballs' of statistical correlations? rdcu.be/e7zx7

Gene regulatory networks: from correlative models to causal explanations

Nature Reviews Genetics - In this Perspective, Maizels and Briscoe discuss the limitations of current models of gene regulatory networks and outline solutions to harness data abundance without...

rdcu.be

Last year at EMBL, Prof. McIntosh gave a historical overview of the discovery of dynamical instability, and it was one of the most insightful and fun lectures I've ever listened to. Really excited to read this piece from him.

Journal of Cell Biology@jcb.org · 10mo ago

Perspective from Richard McIntosh describing the history of research on #microtubule polymerization in terms of the ideas, technologies, and observations that have emerged as countless researchers have studied the dynamics of these essential cytoskeletal polymers. rupress.org/jcb/article/...