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Rasmus Jensen

@rasmusjensen.bsky.social
317 followers 347 following 35 posts

In-cell structural biology @ EMBL Heidelberg Big nerd, interested in structural biology at large and cryo electron tomography, immunology, and host-microbe interactions in particular For diversity and inclusivity in science on all fronts

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Reposted by Rasmus Jensen
Molecular Microbiology @molmicrounihoh.bsky.social · 29/09/2026
Wow: In-cell discovery and characterization of a non-canonical bacterial protein translocation-folding complex! www.sciencedirect.com/science/arti... @cellpress.bsky.social #mycoplasma
sciencedirect.com
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Reposted by Rasmus Jensen
Cell - a Cell Press journal @cp-cell.bsky.social · 25/09/2026
Now online! In-cell discovery and characterization of a non-canonical bacterial protein translocation-folding complex
dlvr.it
In-cell discovery and characterization of a non-canonical bacterial protein translocation-folding complex
In-cell cryo-electron tomography (cryo-ET) combined with proteomics, integrative structural modeling, and bioinformatics enables discovery and functional annotation of uncharacterized proteins. In the minimal bacterium Mycoplasma pneumoniae, this reveals a complex that links Sec-based protein translocation and extracellular folding, capable of supporting both co- and post-translational pathways.
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Rasmus Jensen @rasmusjensen.bsky.social · 28/09/2026
Thank you Jan!
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Rasmus Jensen @rasmusjensen.bsky.social · 27/09/2026
Thank you Joy! And to you as well on your recent preprint - looks very cool
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Reposted by Rasmus Jensen
EMBL @embl.org · 26/09/2026
EMBL scientists uncovered new interactions between molecular machines directly inside cells. With cryo-ET, they gleaned new aspects of bacterial protein production, transport, and folding in cells – and a new way to analyse ‘communities’ of molecular machines. www.embl.org/news/science...
embl.org
The bustling molecular communities inside cells | EMBL
New research illuminated mechanisms of bacterial protein production, transport, & folding, while better understanding molecular communities.
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Rasmus Jensen @rasmusjensen.bsky.social · 25/09/2026
Thank you, and thank you for sharing!
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Rasmus Jensen @rasmusjensen.bsky.social · 25/09/2026
Thank you Goran :-) Hope you are still doing well in the US! And hope to see you around at some point, it has been a long time now
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Rasmus Jensen @rasmusjensen.bsky.social · 25/09/2026
Thank you Jeremy! Hope you are doing well :-)
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Rasmus Jensen @rasmusjensen.bsky.social · 25/09/2026
Thank you, and thank you for sharing!
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Rasmus Jensen @rasmusjensen.bsky.social · 25/09/2026
Thank you for the kind words and for sharing, it is much appreciated!
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Rasmus Jensen @rasmusjensen.bsky.social · 25/09/2026
Amazing work by Joe! Give it a read, you won't be disappointed!
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Reposted by Rasmus Jensen
joe dobbs @joedobbs.bsky.social · 25/09/2026
Our work investigating the cooperation between gene expression machines is now online @cellpress.bsky.social. Check it out if you're interested in high-throughput #cryoET, transcription and translation, or using structural biology to quantify gene expression in cells! 🔬 www.cell.com/cell/fulltex...
cell.com
Single-cell visual proteomics of a minimal bacterium reveals structural coordination of gene expression machineries
Cryo-electron tomography (cryo-ET) resolves and quantifies an almost complete view of bacterial translation, revealing how gene expression machineries coordinate across the processes of transcription,...
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Rasmus Jensen @rasmusjensen.bsky.social · 25/09/2026
Thank you for sharing Joe! And Big congrats on your paper! It is amazing work!! 🥳
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Rasmus Jensen @rasmusjensen.bsky.social · 25/09/2026
And it gets better: @joedobbs.bsky.social paper on the multilayered control of bacterial translation is also out in Cell today; proud to be second author on it too. Two Cell papers, one day! 🎉 🧵(7/7)
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Rasmus Jensen @rasmusjensen.bsky.social · 25/09/2026
📖 Open access via @cellpress.bsky.social: doi.org/10.1016/j.ce... Big thanks to @embl.org for making this work possible. #cryoET #StructuralBiology #Microbiology #AlphaFold #EMBL #TeamTomo 🧵(6/7)
doi.org
Redirecting
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Rasmus Jensen @rasmusjensen.bsky.social · 25/09/2026
Huge thanks to my co-first author Liang Xue and all our co-authors. I'd be remiss not to mention Peer Bork, originally a corresponding author, who tragically passed away during revision. A huge loss for science, and a wonderful collaborator to me personally. 🧵(5/7)
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Rasmus Jensen @rasmusjensen.bsky.social · 25/09/2026
Using antibiotics to block protein synthesis, we classified how the complex reorganizes to let folded substrate escape the extracellular chamber. Takeaway: when sequence fails, structure can still tell you what a protein does. 🧬 🧵(4/7)
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Rasmus Jensen @rasmusjensen.bsky.social · 25/09/2026
Sequence searches found nothing. Comparing 3D structures did: the dome proteins are distant relatives of the PrsA foldase, and one of them is an active foldase, which we validated in vitro. 🧵(3/7)
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Rasmus Jensen @rasmusjensen.bsky.social · 25/09/2026
It's a protein-folding chamber bolted directly onto the Sec translocon, the machinery that pushes proteins out of the cell. Proteomics + AlphaFold identified the building blocks; crosslinking MS showed how they fit together. 🧵(2/7)
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Rasmus Jensen @rasmusjensen.bsky.social · 25/09/2026
🎉 Out today in Cell: the paper I've been looking forward to sharing for a long time 🎉 We used cryo-ET to find a molecular machine nobody knew existed on the surface of a minimal bacterium, and worked out what it does. 🧵(1/7) #TeamTomo #cryoET
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Rasmus Jensen @rasmusjensen.bsky.social · 25/09/2026
Huge thanks to my co-first author Liang Xue and all our co-authors. I'd be remiss not to mention Peer Bork, originally a corresponding author, who tragically passed away during revision. A huge loss for science, and a wonderful collaborator to me personally. 🧵(5/7)
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Rasmus Jensen @rasmusjensen.bsky.social · 25/09/2026
Using antibiotics to block protein synthesis, we classified how the complex reorganizes to let folded substrate escape the extracellular chamber. Takeaway: when sequence fails, structure can still tell you what a protein does. 🧬 🧵(4/7)
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Rasmus Jensen @rasmusjensen.bsky.social · 25/09/2026
Sequence searches found nothing. Comparing 3D structures did: the dome proteins are distant relatives of the PrsA foldase, and one of them is an active foldase, which we validated in vitro. 🧵(3/7)
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Rasmus Jensen @rasmusjensen.bsky.social · 25/09/2026
It's a protein-folding chamber bolted directly onto the Sec translocon, the machinery that pushes proteins out of the cell. Proteomics + AlphaFold identified the building blocks; crosslinking MS showed how they fit together. 🧵(2/7)
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Rasmus Jensen @rasmusjensen.bsky.social · 23/06/2026
Great new study from Veijo! Using cryoET, cell biology and molecular dynamics simulations to show how seipin switches from a closed to an open conformation that defines the ER–lipid droplet connection and drives lipid droplet growth.
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Reposted by Rasmus Jensen
Veijo Salo @veijosalo.bsky.social · 23/06/2026
How does a cell remodel the ER membrane into a lipid droplet? Excited to share our new bioRxiv preprint, where we find that regulated opening of the seipin ring defines a functional ER–lipid droplet interface — and identify SMLR1 as a regulator of this transition. www.biorxiv.org/content/10.6...
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Rasmus Jensen @rasmusjensen.bsky.social · 27/03/2026
Thanks for the highlight! It’ll soon get an update with more experimental validation of the composition as well as functional validation so stay tuned
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Reposted by Rasmus Jensen
Sophien Kamoun @kamounlab.bsky.social · 27/03/2026
Combining proteomics, structure prediction, bioinformatics and cryoET to discover non-canonical bacterial protein translocation-folding complex doi.org/10.1101/2025...
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Rasmus Jensen @rasmusjensen.bsky.social · 20/03/2026
It is still unreleased on PDB - I tried increasing to 10 candidates but it didn't hit the right stociomtry but I also think it is a very hard case. I tried on the E coli holotranslocon and it did well (it's also 1:1:1:1:1:1:1). Is it actually possible for it to predict 0 of a component?
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Rasmus Jensen @rasmusjensen.bsky.social · 20/03/2026
And also is there a limit to how many components it works for reliably (e.g. if you have 6+ or 12+ proteins, does it start to get very complicated?)
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Rasmus Jensen @rasmusjensen.bsky.social · 20/03/2026
Interesting! And thanks for making it so easy to access - Sorry if this is answered in the preprint as I've not read it yet, but do you have any idea of whether it also performs well on membrane-associated or membrane proteins. I tried for my favorite complex but it did not perform well.
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Reposted by Rasmus Jensen
Veijo Salo @veijosalo.bsky.social · 18/12/2025
Excited to share that as my group launches across Karolinska Institutet and the University of Helsinki, we’re recruiting postdocs and research assistants to study the nanoscale architecture of lipid flux using in-cell structural biology approaches, including cryo-ET and cryo-CLEM
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Reposted by Rasmus Jensen
Nature Protocols @natprot.nature.com · 03/12/2025
In another inspiring talk at #EMBOComp3D, Julia Mahamid spoke about recent in-cell cryo-ET results www.biorxiv.org/content/10.1...
biorxiv.org
In-cell discovery and characterization of a non-canonical bacterial protein translocation-folding complex
Cryo-electron tomography has emerged as powerful technology for in-cell structural biology, and in combination with breakthroughs in protein structure prediction, offers a unique opportunity for illum...
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Rasmus Jensen @rasmusjensen.bsky.social · 19/11/2025
Tired of knowing what you are looking for in your tomograms? Why not try bluesky-less Frosina's new self-supervised algorithm for semantic segmentation and particle picking for #teamtomo (includes a new denoiser without the need for odd/even tomos) Code is on GitHub if you want to try it out
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Reposted by Rasmus Jensen
bioRxiv Bioinfo @biorxiv-bioinfo.bsky.social · 12/11/2025
CryoSiam: self-supervised representation learning for automated analysis of cryo-electron tomograms www.biorxiv.org/content/10.1101/202…
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Reposted by Rasmus Jensen
Oli Clarke @olibclarke.bsky.social · 15/10/2025
Missed this at the time, super cool. Domes & capsules everywhere it seems..
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Reposted by Rasmus Jensen
joe dobbs @joedobbs.bsky.social · 15/10/2025
Check out our preprint! With new molecular mechanisms, 140 subtomogram averages, and ~600 annotated cells under different conditions, we @embl.org were able to describe bacterial populations with in-cell #cryoET. And there’s a surprise at the end 🕵️ www.biorxiv.org/content/10.1... #teamtomo
Figure 1 from the preprint
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Rasmus Jensen @rasmusjensen.bsky.social · 03/10/2025
Congratulations!
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Rasmus Jensen @rasmusjensen.bsky.social · 18/08/2025
Congrats! 🎉
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Reposted by Rasmus Jensen
Lars-Anders Carlson @lacarlson.bsky.social · 13/08/2025
Repost appreciated: Open #PhDposition in structural virology in my group! Join us in Umeå, Sweden to uncover how arboviruses remodel infected cells. In situ #cryoET and #cryoEM combined with #virology, #cellbiology, and #biophysics. Deadline 7 September. More info: www.carlsonlab.se/join/
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Rasmus Jensen @rasmusjensen.bsky.social · 23/05/2025
Keep your eyes peeled. There’ll soon be another preprint by @joedobbs.bsky.social showing a myriad of translation/transcription complexes in Mycoplasma, and later I’ll have more on protein folding. I hope with new methods it will soon be much more automated giving rise to countless new discoveries!
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Rasmus Jensen @rasmusjensen.bsky.social · 23/05/2025
Very nice and generous summary of our recent preprint by @ewanbirney.bsky.social #cryoem #cryoet #proteinfolding #translocation
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Reposted by Rasmus Jensen
Ewan Birney @ewanbirney.bsky.social · 22/05/2025
This is just an excellent preprint by Rasmus Jensen and colleagues from Julia Mahamid's lab @embl.org - a tour de force of Cryogenic electron tomography to do in cell structural biology in which they discover a new complex and solve its structure and function! www.biorxiv.org/content/10.1...
biorxiv.org
In-cell discovery and characterization of a non-canonical bacterial protein translocation-folding complex
Cryo-electron tomography has emerged as powerful technology for in-cell structural biology, and in combination with breakthroughs in protein structure prediction, offers a unique opportunity for illum...
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Rasmus Jensen @rasmusjensen.bsky.social · 23/05/2025
Thank you for the kind words. We are very happy to finally share this story with the community
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Rasmus Jensen @rasmusjensen.bsky.social · 30/04/2025
We unfortunately don’t know - as mentioned in the discussion we looked for it but it may be too low abundance or transient for us to capture - but a great direction to follow up on 😉
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Rasmus Jensen @rasmusjensen.bsky.social · 28/04/2025
www.biorxiv.org/content/10.1... This link should work - I did not find a way to edit the original post
biorxiv.org
In-cell discovery and characterization of a non-canonical bacterial protein translocation-folding complex
Cryo-electron tomography has emerged as powerful technology for in-cell structural biology, and in combination with breakthroughs in protein structure prediction, offers a unique opportunity for illum...
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Rasmus Jensen @rasmusjensen.bsky.social · 28/04/2025
Are you into cryo-ET, in-cell discovery, protein translocation and folding or just cool integration of structural biology, proteomics and bioinformatics? Then see our new work: www.biorxiv.org/content/10.1... Thank you to all coauthors for your amazing work!
biorxiv.org
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Rasmus Jensen @rasmusjensen.bsky.social · 22/02/2025
Looks great! What is the approximate time-line for code release for people who’re interested in trying it on their own data?
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