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Reposted by Laura Eme

Javier del Campo @fonamental.bsky.social · Jul 11

Divergent Plastid Genomes in the Deepest-Branching Apicomplexan Parasites #protists #protistsonsky academic.oup.com/gbe/article/...

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Laura Eme @lauraeme.bsky.social · Jun 26

Beautiful work!

Roland Hatzenpichler @environmicrobio.bsky.social · Jun 26

Preprint🚨 #microsky 🦠 “Cultivation of Methanonezhaarchaeia, the third class of methanogens within the phylum Thermoproteota”, authored by @kohtzarchaeota.bsky.social & Sylvia Nupp, expands the diversity of methanogens! 90% enriched, methylotrophic culture from a hot spring. A 🧵 tinyurl.com/yw8ku2bj

Enrichment cultivation and visualization of Ca. Methanonezhaarchaeum fastidiosum

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Reposted by Laura Eme

Eelco Tromer @eelcotromer.bsky.social · Jun 23

Happy to see our work published and glad to have contributed together with @maxraas.bsky.social ! Looking forward to all the projects that will come out of this work!

Laura Eme @lauraeme.bsky.social · Jun 22

Excited to share our new paper in @cellreports.bsky.social that reshapes our understanding of chromosome organization's deep evolutionary roots! Our work dives into the origins of the machinery that structures our very genomes.

🔗: doi.org/10.1016/j.ce...

#Genomics #Evolution #CellBiology #LECA

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Laura Eme @lauraeme.bsky.social · Jun 23

We haven’t. But we have follow up projects that dig more specifically in the archaeal side of things!

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Laura Eme @lauraeme.bsky.social · Jun 22

A huge shoutout to @jvhooff.bsky.social who poured her soul into this paper, and our co-authors @eelcotromer.bsky.social and Max Raas!

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Laura Eme @lauraeme.bsky.social · Jun 22

If you’re into chromosome biology, genome organization, or evolutionary cell biology, give it a read and share your thoughts!
🔗 doi.org/10.1016/j.celrep.2025.115855
#EvoCellBio #Genomics #SMC #LECA #Chromatin

Redirecting

doi.org

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Laura Eme @lauraeme.bsky.social · Jun 22

Going deeper, duplications of SMC genes happened before eukaryotes: they trace back to the TACK + Asgard archaeal ancestor. This hints at sophisticated chromosome management in the archaeal lineage that gave rise to eukaryotes. #eukaryogenesis #archaea

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Laura Eme @lauraeme.bsky.social · Jun 22

Surprise: condensin II was lost independently >30 times across eukaryote evolution—making it one of the most frequently discarded cellular machineries we know. This highlights major shifts in genome organization throughout eukaryotic history.

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Laura Eme @lauraeme.bsky.social · Jun 22

SMC complexes (condensin I/II, cohesin, SMC5/6) are the molecular machines that fold chromosomes. By scanning >1 000 genomes we show LECA already housed all four—pointing to a remarkably sophisticated ancestral eukaryote.

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Laura Eme @lauraeme.bsky.social · Jun 22

Excited to share our new paper in @cellreports.bsky.social that reshapes our understanding of chromosome organization's deep evolutionary roots! Our work dives into the origins of the machinery that structures our very genomes.

🔗: doi.org/10.1016/j.ce...

#Genomics #Evolution #CellBiology #LECA

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Laura Eme @lauraeme.bsky.social · Jun 19

Thank you, Jacob!

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Laura Eme @lauraeme.bsky.social · Jun 19

Because it’s done on a computer, some think it doesn’t require expertise and that anyone can do it through button pushing. Just because there are arguments doesn’t mean all arguments have equal value. And in fact, over time, many things in phylogenetics have settled even when they started hot.

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Laura Eme @lauraeme.bsky.social · Jun 19

Meaning what? 🫣

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Laura Eme @lauraeme.bsky.social · Jun 17

With @deemteam.bsky.social @andrewjroger.bsky.social and more!!

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Laura Eme @lauraeme.bsky.social · Jun 17

Why it matters
🎯 Helps to place DPANN firmly in the archaeal tree, tidying up a long-standing evolutionary puzzle
💡 Highlights cross-domain gene transfer as a key driver in archaeal innovation
🌱 Opens doors to explore how free‑living ancestors gave rise to symbiotic lifestyles

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Laura Eme @lauraeme.bsky.social · Jun 17

4/ We uncovered ancient horizontal gene transfer events from symbiotic bacteria—namely Patescibacteria and Omnitrophota—that likely empowered DPANN’s shift to their unique episymbiotic lifestyles

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Laura Eme @lauraeme.bsky.social · Jun 17

3/ Altiarchaeota emerge as the earliest‑diverging branch in DPANN, suggesting an origin from free‑living ancestors

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Laura Eme @lauraeme.bsky.social · Jun 17

2/ Key finding: DPANN forms a monophyletic clade within Euryarchaeota, resolving a long-standing debate on their evolutionary placement

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Laura Eme @lauraeme.bsky.social · Jun 17

1/ We used 126 conserved proteins across 11 known DPANN phyla, with careful taxon sampling and sophisticated phylogenomic analysis

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Laura Eme @lauraeme.bsky.social · Jun 17

🎉 Now out “Phylogenomic analyses indicate the archaeal superphylum DPANN originated from free‑living euryarchaeal‑like ancestors” www.nature.com/articles/s41...

Phylogenomic analyses indicate the archaeal superphylum DPANN originated from free-living euryarchaeal-like ancestors - Nature Microbiology

Phylogenetic reconstructions with conserved protein markers from the 11 known DPANN phyla reveal their monophyletic placement within the Euryarchaeota.

www.nature.com

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Laura Eme @lauraeme.bsky.social · May 25

Every night should be duck night Chez Gladines ! 😋

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Reposted by Laura Eme

Daniel Tamarit @danieltamarit.bsky.social · May 14

New vacancy in my team!

PhD student position on microbial genome evolution, focusing on the evolutionary principles underlying bacterial genome architecture.

Please repost and share with talented MSc students in #evobio, bioinformatics or related :)

www.uu.nl/en/organisat...

#MEvoSky #MicroSky

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Laura Eme @lauraeme.bsky.social · May 12

Fair enough, my initial post was hastily worded.

And yes, when at least one reviewer defeats the point of peer-review by saying teh authors shouldn’t do more work and the debate should happen in public, that’s not helping anyone.

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Reposted by Laura Eme

Jason Stajich @hyphaltip.bsky.social · May 9

usccn.org/spotlight-on...

Spotlight on DSMZ: Germany’s Leading Microbial Culture Collection - United States Culture Collection Network

USCCN Project Manager Dusti Gallagher and Steering Committee member Matthew Ryan (CABI) participated in the MICROBE project (The MICRObiome Biobanking (RI) Enabler) 2nd Annual Consortium Meeting held ...

usccn.org

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Reposted by Laura Eme

Journal of Eukaryotic Microbiology @jeukmicro.bsky.social · May 8

Check out exciting protist research in JEM! Holly Moeller et al. explore the feeding habits of Mesodinium rubrum and provide a tool for studying its cell biology and photophysiology in their open access paper in our March/April issue!
doi.org/10.1111/jeu....
#protistsonsky

The marine ciliate Mesodinium rubrum (bottom right) is famed for its ability to steal chloroplasts and nuclei from red cryptophyte algae in the Teleaulax/Gemingera clade. But even these prey specialists can make "mistakes," ingesting blue-green Hemiselmis pacifica (upper left) and transiently retaining their plastids. Here, a M. rubrum cell points its feeding tentacles (labeled with an anti-centrin antibody, yellow) at an H. pacifica cell. The cryptophyte's flagella and ciliate's cilia (labeled with an anti-tubulin antibody, purple) and nuclei (labeled with DAPI, blue) are visible in this expansion micrograph taken with a Nikon spinning disk confocal microscope. Numerous stolen prey nuclei are visible inside of the M. rubrum cell. See Moeller et al. https://doi.org/10.1111/jeu.13066

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