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Stephan Köstlbacher

@stephkoe.bsky.social
579 followers 721 following 46 posts

Scientific Computing Specialist @ AITHYRA Opinions are my own he/him

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Reposted by Stephan Köstlbacher
Philipp Radler @radler92.bsky.social · 13h
The first paper of my PostDoc in Christa Schlepers group (@archaea-vienna.bsky.social) on the dynamics of Asgard archaea is now out in Nature! www.nature.com/articles/s41... This was a great team effort and I am looking forward to uncover the complex behavior of these cells further!
nature.com
Dynamic protrusions mediate crawling motility in Asgard archaea - Nature
Anoxic live-cell imaging shows actin-dependent crawling motility and dynamic protrusions in Asgard archaea, providing insights into cellular innovations that may have contributed to eukaryotic evoluti...
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Archaea Biology Vienna @archaea-vienna.bsky.social · 13h
Our paper on the dynamics of Asgard archaea (Promethearchaeota) is now out in Nature! Huge thanks to the reviewers for helping make the manuscript stronger. www.nature.com/articles/s41... Two “Lokis” stained for Lokiactin (FastAct, magenta), reaching toward each other to celebrate 🎉 #archaea
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Archaea Biology Vienna @archaea-vienna.bsky.social · 30/09/2026
Congrats to Dimitri and all co-authors on their new publication! Common Nitrification Inhibitors Exhibit Distinct Mechanisms on the Ammonia-Oxidizing Archaeon Nitrososphaera viennensis A great and in-depth look at SNIs and AOA! @dimdalk.bsky.social #archaea #omics doi.org/10.1021/acs....
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Nika Pende @nikapende.bsky.social · 23/09/2026
So happy to see this paper finally out 🥳 it took only seven years after the first purification of archaeal peptidoglycan 🤣 Congrats to all the people involved 🥂🍾 And here is the story behind the paper: communities.springernature.com/posts/cracki...
communities.springernature.com
Cracking the Archaeal Cell Wall: How a hydrolase overturned a 50-year-old paradigm
Using bioinformatics, biochemistry, NMR, as well as the newly characterized enzyme ArmA from methanogenic archaea, we revised the existing knowledge on archaeal peptidoglycan structure. At the same ti...
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Archaea Biology Vienna @archaea-vienna.bsky.social · 15/08/2026
Excited to share the final version of this great project! Oxygen production as an electron overflow pathway in ammonia-oxidizing archaea www.science.org/doi/10.1126/... #archaea #oxygen #AOA #nitrification #physiology
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BejaLabTechnion @bejalab.bsky.social · 30/07/2026
Eukaryotic-like microtubules and dynamic instability of Asgard archaeal tubulins www.science.org/doi/full/10....
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Romain Strock @romainstrock.bsky.social · 29/07/2026
Preprint alert: the final two chapters of my thesis are out! www.biorxiv.org/content/10.6... Bacteriocins in archaea and archaeocins in bacteria: a computational journey into the search for weaponry borrowed from another domain of life. A short 🧵
biorxiv.org
Bacteriocins in archaea and archaeocins in bacteria
Archaea and bacteria routinely live side by side in microbial communities and must interact at least on occasion. Whether such cross-Domain interactions are dominated by mutual disregard, co-operation...
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Fabai Wu @fabaiwu.bsky.social · 27/07/2026
Discovery of a Turing reaction-diffusion system in Archaea! www.biorxiv.org/content/10.6...
biorxiv.org
A self-organized geometry sensing oscillator spatially regulates cell division in archaea
Cell division must be tightly regulate in time and space. Many bacteria and eukaryotes employ geometry sensing systems to regulate cell division spatiotemporally. However, how archaea ensure they divi...
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Cameron Thrash @jcamthrash.bsky.social · 24/07/2026
Eukaryotic-like microtubules and dynamic instability of Asgard archaeal tubulins www.science.org/doi/full/10.... #jcampubs
science.org
Eukaryotic-like microtubules and dynamic instability of Asgard archaeal tubulins
Asgard archaeal mini microtubules suggest an archaeal origin of eukaryotic microtubules.
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Jason Nomburg @jnoms.bsky.social · 22/07/2026
Happy to share the first preprint out of the Nomburg lab! Many aspects of cellular immunity are shared across the tree of life. Here, we show that some of these conserved aspects of cellular immunity are mirrored by conserved effectors of immune antagonism. Thread below! 1/15
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Fabai Wu @fabaiwu.bsky.social · 18/07/2026
Systematic identification of cell division proteins in haloarchaea and the discovery of a membrane anchor for the Z ring. www.biorxiv.org/content/10.6...
biorxiv.org
Systematic identification of cell division proteins in haloarchaea and the discovery of a membrane anchor for the Z ring
Most archaea rely on the tubulin-like protein FtsZ for division. In the last decade, several novel cell division proteins have been discovered in the model haloarchaeon Haloferax volcanii which contai...
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bioRxiv Microbiology @biorxiv-microbiol.bsky.social · 16/07/2026
Systematic identification of cell division proteins in haloarchaea and the discovery of a membrane anchor for the Z ring www.biorxiv.org/content/10.64898/20…
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Chung Hyun Cho @chc-evobio.bsky.social · 04/07/2026
Excited to share our new preprint led by Fred and me in collaboration with the archaeal community! We found that the molecular foundation of histone-based chromatin has pre-eukaryotic roots in Asgard archaea. (1/4) #ArchaeaSky www.biorxiv.org/content/10.6...
biorxiv.org
Emergence of histone-based chromatin complexity in Asgard archaea
The emergence of the eukaryotes coincided with the diversification of histone proteins and their post-translational modifications by enzymes that constitute the core of eukaryotic chromatin. Yet the e...
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Daan Speth @daanspeth.bsky.social · 26/06/2026
I'm happy to announce the release of GlobDB r232! This version contains 346,233 bacterial and archaeal genomes, based on 26 datasets. More info globdb.org 🦠🖥️🧬
globdb.org
home | GlobDB
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mdreimann.bsky.social @mdreimann.bsky.social · 19/06/2026
Super excited to share my first paper from my PhD in the @dodonova-sveta.bsky.social lab. We visualise how chromatin from archaeal cells is organised using cryo-ET and SPA. Big thanks to everyone involved in this project!
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Tobias Warnecke @tobiaswarnecke.bsky.social · 11/06/2026
Archaea the hornets of the microbial world. Discuss. www.biorxiv.org/content/10.6... TLDR: Archaeon kills bacterium with secreted phospholipase. Pretty nifty way to kill bacteria if you are a microbe with a very different lipid make-up, I reckon. No need to worry about accidentally killing yourself.
biorxiv.org
A Bactericidal Phospholipase from Archaea
Archaea kill bacteria, at least on occasion. The molecular underpinnings of these lethal interactions are barely understood. Here, we describe cinquedea, an α/β hydrolase secreted by the halophilic ar...
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Henry Gee 亨利·纪 @endofthepier.bsky.social · 10/06/2026
Eukaryogenesis was about more than a proteobacterium hitching a lift with an archaeon. Genes from other kinds of bacteria came along for the ride, stitched together with viruses. Paper in @nature.com www.nature.com/articles/s41...
nature.com
Gene ancestries reveal diverse microbial associations during eukaryogenesis - Nature
Phylogenomic reconstruction of the proteome of the last eukaryotic common ancestor sheds light on the origin of eukaryotes, indicating an important role of horizontal transfer of genes from diverse ba...
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Daniela Barillà @danielabarilla.bsky.social · 01/06/2026
Chromatin organization in Asgard archaea: histones, SMC complexes, and the archaeal roots of eukaryotic chromatin: Trends in Genetics www.cell.com/trends/genet... New review by @jvhooff.bsky.social & @damelab.bsky.social
cell.com
Chromatin organization in Asgard archaea: histones, SMC complexes, and the archaeal roots of eukaryotic chromatin
The genomes of organisms across the tree of life are structurally and functionally organized into chromatin. In eukaryotes, within an organelle called the nucleus, chromatin is shaped by histones and ...
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Stephan Köstlbacher @stephkoe.bsky.social · 22/05/2026
Can vouch! I worked a lot with Dani and he's one of the most thoughtful, generous scientists I know. If you're into archaea and want a PI who invests in his people (and yes, the cake breaks are real), apply. You won't regret it.
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Leigh Anne Riedman @fossils.bsky.social · 20/05/2026
Excited to say that my new paper with @maxlechte.bsky.social (and others not on bluesky) has come out in @nature.com! Study of sediments, geochemistry and fossils from rocks 1.75 to 1.4 billion years old indicate that the oldest known #eukaryotes were aerobic and benthic! #protists rdcu.be/fjNgL
rdcu.be
Early fossil eukaryotes were benthic aerobes
Nature - Integrated palaeontological, sedimentological and geochemical analyses of ancient rocks from Australia show that early eukaryotes were largely restricted to oxygenated benthic habitats,...
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Sonja-Verena Albers @archaellum.bsky.social · 20/05/2026
New preprint! Cell division has to happen at the right place but how Archaea pick that place is unknown. We now identified a three-protein system, Dip, that positions the divisome at midcell in H. volcanii and is broadly conserved across Archaea. A thread 🧵 www.biorxiv.org/content/10.6...
biorxiv.org
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Lorenzo Olivi @loreoliv.bsky.social · 11/05/2026
🧵 New pre-print out from my time at @mib-wur.bsky.social showing how the titration of the initiator protein DnaA on the chromosome of E. coli can generate stable DNA replication @hohlbeinlab.bsky.social @nicoc-micsynmet.bsky.social doi.org/10.64898/202...
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Archaea Biology Vienna @archaea-vienna.bsky.social · 11/05/2026
Do biofilms give an ecological advantage? Yes! A fantastic follow-up to our previous biofilm work in ammonia-oxidizing archaea: "Biofilm Lifestyle Drives Ecophysiological Niche Expansion in an Archaeal Soil Nitrifier" www.biorxiv.org/content/10.6... Congratulations to all authors! #archaea
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Archaea Biology Vienna @archaea-vienna.bsky.social · 11/05/2026
We are excited to share a new preprint from Dimitris Dalkidis that identifies the effects of inhibitors DMPP and ATU in ammonia-oxidizing archaea! #archaea "Common nitrification inhibitors exhibit varied physiological mechanisms on an ammonia-oxidizing microorganism" www.biorxiv.org/content/10.6...
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niels-fischer.bsky.social @niels-fischer.bsky.social · 07/05/2026
How do mitochondrial ribosomes keep pace with membrane insertion? Now out in NSMB: We show that mitoribosomes slow down at defined positions linked to membrane insertion and protein topology: rdcu.be/fhqIT #Mitochondria #Ribosome #CryoEM
rdcu.be
Membrane insertion of mitochondrial-encoded proteins regulates ribosome decoding speed
Nature Structural & Molecular Biology - Schöndorf and Petrychenko et al. show that mitochondrial translation speed is coupled to OXA1L-mediated inner membrane insertion, with...
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Clément Madru @cryoclem.bsky.social · 05/05/2026
Happy to share our latest paper: www.nature.com/articles/s41... Great collaboration with @ifremer.bsky.social, @cbitoulouse.bsky.social & @pasteur.fr. Studying stress in P. abyssi with near-native, minimally purified ribosomes, we identified HibA, a new hibernation factor widespread in Archaea.
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Kenneth Loi @kenjmloi.bsky.social · 27/04/2026
Excited to share our discovery of a new programmable RNA-guided DNA-targeting system hiding inside bacteriophages that predates CRISPR. We call it VIPR (Viral Interference Programmable Repeat), and it uses an entirely new logic to find its targets. Thread + link below.
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Mart Krupovic @mkrupovic.bsky.social · 24/04/2026
A new family of rolling-circle replication endonucleases widespread in archaeal viruses and plasmids. This family is unrelated to the HUH superfamily Reps, but distantly related to the bacterial Rep_trans enzymes. @narjournal.bsky.social academic.oup.com/nar/article/...
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Karolin Luger @nucleosomepolice.bsky.social · 15/04/2026
Finally published at long last (at least in the pre-view version). Explore the wild and woolly world of archaeal histones! Interactive archaeal histone graph incluced rdcu.be/fdFjv. Congratulations to first author Shawn Laursen
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Institute of Science and Technology Austria (ISTA) @istaresearch.bsky.social · 14/04/2026
A recent publication in The Journal of Chemical Physics by ISTA alumni Felix Frey and Miguel Amaral with Professor Anđela Šarić explores how geometry controls archaeal membrane stability and lipid organization. DOI: doi.org/10.1063/5.0325170
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Alex Crits-Christoph @acritschristoph.bsky.social · 10/04/2026
An Asgard archaeon from a modern analog of ancient microbial mats (Current Biology) Beautiful microscopy of an Asgard archaeon, in the same family as Lokiarchaea, in syntrophy with a sulfate-reducing bacteria Very very nice paper we saw in preprint form: www.cell.com/current-biol...
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Cameron Thrash @jcamthrash.bsky.social · 10/04/2026
Phylogenomics of Asgard archaea reveals a unique blend of prokaryotic-like horizontal transfer and eukaryotic-like gene duplication www.nature.com/articles/s41... #jcampubs
nature.com
Phylogenomics of Asgard archaea reveals a unique blend of prokaryotic-like horizontal transfer and eukaryotic-like gene duplication - Nature Communications
The genomes of Asgard archaea, the closest prokaryotic relatives to eukaryotes, are larger than those of other archaea and contain multiple genes seemingly acquired from bacteria. Here, Manzano-Morales and Gabaldón quantify gene duplication, loss, and transfer events in Asgard genomes, showing that gene duplications, rather than horizontal gene transfers, are the primary drivers behind the increased genome sizes.
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Christian Kost @kostchristian.bsky.social · 10/04/2026
Planetary microbiome structure and generalist-driven gene flow across disparate habitats: Cell www.cell.com/cell/fulltex...
cell.com
Planetary microbiome structure and generalist-driven gene flow across disparate habitats
A planetary-scale analysis of over 85,000 metagenomes establishes a framework for exploring the structure and drivers of global microbial habitats, revealing that generalist species bridge ecological boundaries to mediate gene flow across disparate habitats, including the dissemination of antimicrobial resistance.
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Marta Skreta @martaowesyou.bsky.social · 08/04/2026
What if AI could invent enzymes that nature hasn’t seen? 👩‍🔬🧑‍🔬 Introducing 🪩 DISCO: Diffusion for Sequence-structure CO-design 📝 Blog: disco-design.github.io 📄 Paper: arxiv.org/abs/2604.05181 💻 Code: github.com/DISCO-design...
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Alex Tong @alextong.bsky.social · 08/04/2026
Such an incredible journey building DISCO 🪩. Love working with this team. DISCO is a co-design model with functional, de novo, new-to-nature enzymes. Huge shoutout to my co-authors for making this a reality! 🚀👇
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Daan C. Swarts @dcswarts.bsky.social · 09/04/2026
PostDoc position available! (links in post below) Feel free to share!
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Evgenii Protasov @evgenii-protasov.bsky.social · 01/04/2026
Chromatin organization in Asgard archaea: histones, SMC complexes, and the archaeal roots of eukaryotic chromatin #microbiology #genetics #genome #chromatin #archaea #eukaryotes #MicroSky @cp-trendsgenetics.bsky.social www.sciencedirect.com/science/arti...
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Dame lab at Leiden University @damelab.bsky.social · 27/03/2026
New review in @cp-trendsgenetics.bsky.social on the fascinating world of chromatin organization in Asgard archaea. Very nice joint effort with @jvhooff.bsky.social www.sciencedirect.com/science/arti...
sciencedirect.com
Chromatin organization in Asgard archaea: histones, SMC complexes, and the archaeal roots of eukaryotic chromatin
The genomes of organisms across the tree of life are structurally and functionally organized into chromatin. In eukaryotes, within an organelle called…
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DEEMteam_Orsay @deemteam.bsky.social · 23/03/2026
We have just published a short note on archaeal phylogeny: complex mixture models support a deep placement of Methanonatronarchaeia within Euryarchaea and indicate that three recently described groups (Halorutilales, Afararchaeaceae, and Ordosarchaeia) are actually the same. shorturl.at/5GMpU
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Ben J Woodcroft @benjwoodcroft.bsky.social · 23/03/2026
New paper in mSystems! 🧵 - how much of your metagenome is actually bacterial/archaeal DNA? For many samples, nobody knows. We built SingleM prokaryotic_fraction (SPF) to answer this, then ran it on >100,000 public metagenomes. 🧬🖥️🦠 Here's what we found 👇 doi.org/10.1128/msystems.01062-25
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Brett Baker @archaeal.bsky.social · 13/03/2026
Having a hard time keeping up with the fast-moving field of origin of eukaryotes/Asgards archaea? Our new perspective article can help, we review the status of research over the last decade and where it's going. The archaeal roots of eukaryotic life www.pnas.org/doi/10.1073/...
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Brian D. Wade @astrobrian.bsky.social · 14/03/2026
#archaea
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Tominaga K. (tomiken) @pacyc184.bsky.social · 15/03/2026
The archaeal roots of eukaryotic life | PNAS www.pnas.org/doi/10.1073/pnas.25160…
pnas.org
The archaeal roots of eukaryotic life | PNAS
Resolving the biological and geological events that led to the origin of eukaryotes is an ongoing challenge in biology. A major step in the evoluti...
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Brett Baker @archaeal.bsky.social · 12/03/2026
Asgard archaea on CBC radio. ici.radio-canada.ca/ohdio/premie...
ici.radio-canada.ca
Asgard : Potentiel chaînon manquant de la vie complexe | OHdio | Radio-Canada
Écoutez l’extrait de l’émission Les années lumière : Asgard : Potentiel chaînon manquant de la vie complexe
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Nature Reviews Microbiology @natrevmicro.nature.com · 13/03/2026
ICYMI: New online! Diversity, ecology, cell biology and evolution of the Asgard archaea
dlvr.it
Diversity, ecology, cell biology and evolution of the Asgard archaea
Nature Reviews Microbiology, Published online: 05 March 2026; doi:10.1038/s41579-026-01288-wThe Asgard archaea have become a cornerstone of archaeal research, particularly for studies aiming to unravel the origin and early evolution of eukaryotes. This Review outlines the current state of the research field focusing on these intriguing microorganisms and discusses future research directions aiming to resolve their diversity, ecology, cell biology and evolution.
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Nature Microbiology @natmicrobiol.nature.com · 06/03/2026
Out Now! Prediction of eukaryotic cellular complexity in Asgard archaea using structural modelling #MicroSky
go.nature.com
Prediction of eukaryotic cellular complexity in Asgard archaea using structural modelling
Nature Microbiology, Published online: 05 March 2026; doi:10.1038/s41564-026-02273-yA structural catalogue of the Asgard archaeal pangenome reveals hundreds of eukaryotic-like proteins that suggest a higher degree of cellular complexity in the archaeal ancestor of eukaryotes.
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Nature Reviews Microbiology @natrevmicro.nature.com · 06/03/2026
New online! Diversity, ecology, cell biology and evolution of the Asgard archaea
dlvr.it
Diversity, ecology, cell biology and evolution of the Asgard archaea
Nature Reviews Microbiology, Published online: 05 March 2026; doi:10.1038/s41579-026-01288-wThe Asgard archaea have become a cornerstone of archaeal research, particularly for studies aiming to unravel the origin and early evolution of eukaryotes. This Review outlines the current state of the research field focusing on these intriguing microorganisms and discusses future research directions aiming to resolve their diversity, ecology, cell biology and evolution.
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Fabai Wu @fabaiwu.bsky.social · 06/03/2026
Asgard archaea: have we found our microbial ancestors? link.springer.com/article/10.1...
link.springer.com
Asgard archaea: have we found our microbial ancestors? - The EMBO Journal
The discovery of Asgard archaea about a decade ago has greatly reshaped our understanding of archaeal evolution and the origin of eukaryotes. Asgards are currently thought to be the closest prokaryoti...
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Thijs J. G. Ettema 🦠🔬🇳🇱🇸🇪🇪🇺 @ettema.bsky.social · 05/03/2026
Read our review about the "Diversity, ecology, cell biology and evolution of the Asgard archaea" in @natrevmicro.nature.com here: www.nature.com/articles/s41... By @kassipan.bsky.social @stephkoe.bsky.social @micropat.bsky.social & @gerbenz.bsky.social
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Kassiani Panagiotou @kassipan.bsky.social · 05/03/2026
Just over ten years after the discovery of the first Asgard archaeal genomes, we revisit the rapid expansion of this remarkable archaeal lineage. From diverse genomes and metabolisms to eukaryotic signature proteins and the first cultured representatives. www.nature.com/articles/s41...
nature.com
Diversity, ecology, cell biology and evolution of the Asgard archaea - Nature Reviews Microbiology
The Asgard archaea have become a cornerstone of archaeal research, particularly for studies aiming to unravel the origin and early evolution of eukaryotes. This Review outlines the current state of th...
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