Beyond thrilled to share that our study has been published!
This project encompasses years of work, including my thesis research on Asgard archaea in the @archaeal.bsky.social lab at @utmsi.bsky.social and
@texasscience.bsky.social!!!
#MicroSky #ArchaeaSky 1/12
18.02.2026 16:22 β
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New paper from my team detailing a greatly expanded genomic database of Asgard archaea revealing of high energy metabolism those related to eukaryotes! Led by @katyappler.bsky.social lots of help from @jameslingford.bsky.social @valdeanda.bsky.social @kassipan.bsky.social doi.org/10.1038/s415...
18.02.2026 16:00 β
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Finally out in @nature.com: a new piece of the puzzle of how complex life evolved. Lead by @archaeal.bsky.social & @katyappler.bsky.social. Great collab with @greening.bsky.social and @kassipan.bsky.social. More pieces to follow soon! www.nature.com/articles/s41...
18.02.2026 17:59 β
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Author Correction: Inference and reconstruction of the heimdallarchaeial ancestry of eukaryotes - Nature
Nature - Author Correction: Inference and reconstruction of the heimdallarchaeial ancestry of eukaryotes
Today we published a Correction on our 2023 @nature.com paper reporting the heimdallarchaeial ancestry of eukaryotes: www.nature.com/articles/s41...
Corrected paper: www.nature.com/articles/s41...
Importantly, the re-analyses of the corrected dataset are consistent with the original findings.
11.02.2026 21:10 β
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a man walking in a field with an umbrella
ALT: a man walking in a field with an umbrella
Come join us! Soon I will be advertising a postdoc vacancy in my group as part of my @erc.europa.eu AdG project 'DARK ROOTS'. Focus of the project will be on phylo- and metagenomic mining of novel prokaryotic lineages. I will soon post a link here - stay tuned, and please repost! #asgardarchaea
26.11.2025 15:39 β
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21 Vidi grants awarded to Utrecht-based researchers
21 researchers from Utrecht University, University Medical Center Utrecht, and Princess MΓ‘xima Center have each been awarded a Vidi grant worth up to β¬850,000.
Exultant to have been awarded a Vidi grant by the Dutch Research Council (NWO)! Can't wait to get started!
Stay tuned for two upcoming (PhD student & postdoc) positions to study archaeal genome evolution.
Also huge congrats to my colleague @dorotakawa.bsky.social!
www.uu.nl/en/news/21-v...
23.10.2025 12:49 β
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academic.oup.com/mbe/advance-...
Happy to share this one. We investigated the #phylogenetic placement and #genome_evolution of Pangui/Njordarchaea-unique #Asgardarchaea that might have undergone genome reduction...
14.08.2025 19:28 β
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GitHub - stephkoest/witchi: A compositional bias testing and pruning tool for multiple sequence alignments
A compositional bias testing and pruning tool for multiple sequence alignments - stephkoest/witchi
Check out this beautiful work led by @stephkoe.bsky.social, with great teamwork from @danieltamarit.bsky.social and @ettema.bsky.social :
π» github.com/stephkoest/w...
π doi.org/10.1101/2025.07.14.663642
20.07.2025 16:58 β
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π§The placement of halophilic lineages was restored β Methanonatronarchaeia emerged outside Halobacteria, supporting independent origins of halophily
(in agreement with targeted analyses: doi.org/10.1038/s415... &
doi.org/10.1038/s415...)
20.07.2025 16:58 β
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π§© Phyla representing the clades Acherontia and Stygia (Methanobacteriota_B + Hadarchaeota) shifted to sister TACK + Asgardarchaeota β consistent with site-heterogeneous models (doi.org/10.1186/s128...).
20.07.2025 16:58 β
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Among the topological improvements:
π₯Thermophilic clades (e.g. JANJXX01, DRAE01, Korarchaeia) were repositioned in line with recent phylogenomic studies (doi.org/10.1038/s415... &
doi.org/10.1101/2025...).
20.07.2025 16:58 β
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β The number of biased taxa dropped from 95.1% to just 2.3%
β Pruning automatically stopped once further trimming risked loss of phylogenetic signal
Discrepancy between observed and expected amino acid frequencies in taxa:
20.07.2025 16:58 β
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Excited to share our work on WitChi! π οΈπ₯οΈ
We tested it on the GTDB r220 archaeal supermatrix (5,869 taxa & 10,101 cols) removing 55% of sites in <2h.
The phylogeny showed several interesting groupings with overall improved branch support:
#phylogenetics #ArchaeaSky #MSA #opensource #MEvoSky #MicroSky
20.07.2025 16:58 β
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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.
π: doi.org/10.1016/j.ce...
#Genomics #Evolution #CellBiology #LECA
22.06.2025 00:15 β
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Our review on how thermophilic carbon monoxide(!)-eating microbes can aid the transition to renewable carbon-based products.
27.05.2025 18:10 β
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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
14.05.2025 14:07 β
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Ectomycorrhizal symbiosis evolved independently and by convergent gene duplication in rosid lineages
Click on the article title to read more.
Excited to share our recent work on the evolution of ectomycorrhizal plants! π³ 𧬠π₯οΈ
doi.org/10.1111/nph.70054
With: Yvet Boele, @puginiercamille.bsky.social, @mbianc.bsky.social, Cyril Libourel, @maximebonhomme.bsky.social, @kellerjeanphd.bsky.social, @pierremarcdelaux.bsky.social
A thread: (1/5)
12.03.2025 20:17 β
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Postdoc Comparative genomics and genome architecture in early-diverging fungi and their protist relatives (3-year position)
Exciting news! I'm looking for a computational biologist to join my lab at Wageningen University & Research! It's a 3-year postdoc position on Holomycota genome architecture and evolution. Spread the word! www.wur.nl/en/vacancy/p...
05.03.2025 11:56 β
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Ettema Lab Wageningen
Join the conversation
Not new here but will become more active at @bsky.app (I am no longer active on X)
Follow me to hear more about the wonderful world of microbes (evolution, archaea, symbiosis, new microbes, ...). Expect occasional rants about academia, π³π± politics, life, etc.
My research group: go.bsky.app/MzZPftE
04.12.2024 10:11 β
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