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Профиль

Gregor Weiss

Профиль Vively

Assistant Prof at University of Zürich -- host-pathogen interactions across scales --

⟳ Репост от Gregor Weiss

This story is now published in @natplants.nature.com ! 🎉🎩 Check out the final article here: nature.com/articles/s41477-026-02361-1 Very similar to the original bioRxiv preprint, with the addition of some cool polysome analysis (in the supplementals)! Thanks and congrats to everyone involved! 🙏

Chloroplast-encoded small subunit extensions reshape the Chlamydomonas chlororibosome - Nature PlantsUsing in situ cryo-electron tomography, researchers found a unique ‘arm’ domain on the small subunit of Chlamydomonas chlororibosomes. This discovery suggests that chlororibosome structure is more evo...www.nature.comFlorent Waltz

Long in the making, but happy to present the Chlamydomonas chlororibosome! Cryo-ET🔬reveals a large new domain on the small subunit, built from multiple extensions in conserved ribosomal proteins. bioRxiv 📖: shorturl.at/q44tG This suggests greater chlororibosome diversity than expected! 1/n 🧵

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⟳ Репост от Gregor Weiss

New preprint from the lab! Led by graduate student @lainahall.bsky.social we show a new method to thin cells for cryo-EM imaging with minimal damage. www.biorxiv.org/content/10.6...

Optimized cryo-FIB milling strategy to generate thin, minimally damaged biological lamellaeFocused ion beam (FIB)-milling has been adapted to thin frozen cells for visualization of macromolecular structures in situ with cryogenic electron microscopy. However, only a few large and abundant c...www.biorxiv.org
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⟳ Репост от Gregor Weiss

Super excited to launch this search for a new endowed professor at the @biozentrum.unibas.ch! Join us to build a research cluster in Climate Biophysics! 🌍🌊🌾🔬🧪 This is a unique opportunity to create a community in Basel🇨🇭working together on this timely topic! ⏳🌡️ Questions? Please reach out! 👩‍🔬👨‍🔬

Biozentrum, University of Basel

New Assistant (tenure-track) or Associate Professor position in Climate #Biophysics! Join our international research community to explore fundamental molecular mechanisms underlying climate-relevant biological processes. Apply by 7 Sept 2026! www.biozentrum.unibas.ch/de/open-posi...

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⟳ Репост от Gregor Weiss

“The Website” is here! It can be intimidating getting into analysis of #CryoET data, and software is evolving all the time👩‍💻🚀. @phaips.vd.st & @florentwaltz.bsky.social put our lab’s workflows into an online guide. We hope this helps lower the bar to joining #TeamTomo. Feedback much appreciated! 🧪🧶🧬🔬

Philippe Van der Stappen

Hey #TeamTomo, Ever been in need of a tutorial about the fundamentals of cryo-electron tomography? From preprocessing raw frames to high-res subtomogram averaging? That's why @florentwaltz.bsky.social and I made this website! tomoguide.github.io Follow the thread 1 /🧵 #CryoET #CryoEM 🔬🧪

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⟳ Репост от Gregor Weiss

New preprint! In collaboration with @xujwet.bsky.social, @pedrobeltrao.bsky.social, and Akhmanova and Beekman groups, we determined the structure of the transition zone microtubule doublet in mammalian motile cilia, providing potential insights into the regulation of IFT: tinyurl.com/fssnevuc

Structure of the mammalian ciliary transition zone microtubule doubletThe ciliary transition zone gates bidirectional protein trafficking to maintain the specialized ciliary proteome using microtubule doublets as a scaffold. While ciliary axonemal doublets are well-char...tinyurl.com
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⟳ Репост от Gregor Weiss

In a series of 3 papers and preprints, we’re thrilled to share with you the working laser phase plate. In collaboration with research led by Holger Müller at UC Berkeley, this is a huge innovation in imaging to make small and faint objects inside cells visible. bit.ly/4vK9LVn

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⟳ Репост от Gregor Weiss

🛠️💉It's time for engineering contractile injection systems! @chipericson.bsky.social & @davidschaumann.bsky.social introduce programmable CIS - PROCIS, combining tail length control, non-native cargo loading, and cell retargeting all in one system! www.biorxiv.org/content/10.6... 🧵 1/5

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⟳ Репост от Gregor Weiss

We're happy to announce our new preprint! 🐸 easymode: general pretrained networks for cellular cryo-ET. Segment ~20 cellular features – ribosomes, microtubules, mitochondria, nuclei & more – with zero model training. 🔗 doi.org/10.64898/202... 🧵👇

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⟳ Репост от Gregor Weiss

Some phages are named after gods or rivers, this one was named by journalist Thilo Mischke @thilomischke.bsky.social after his grandma ("Oma Karin") while filming in our lab. It's a cool phage that should be temperate but became virulent due to a transposon at its lysogeny control! ⛓️‍💥💪🏼

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⟳ Репост от Gregor Weiss

The really striking part: all three Dip proteins oscillate pole-to-pole, and DipB and DipC also build ring-like structures at midcell. This is reminiscent of the bacterial Min system, which uses oscillation to keep FtsZ centered — but Dip is its own thing (more on that below).

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⟳ Репост от Gregor Weiss

We're super excited to share MissAlignment: a new ML-based approach to reference-free tilt series alignment, spearheaded by @martenchaillet.bsky.social. We think it's going to make your cryo-ET life a lot better. Preprint: www.biorxiv.org/content/10.6... Code: github.com/warpem/miss-... 🧶 Thread:

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⟳ Репост от Gregor Weiss

Really important and relevant study in TB from @danbarberphd.bsky.social and colleagues. We need to re-think many assumptions. Nitric oxide production in mice has been a confounding factor. #tuberculosis

Daniel L. Barber, PhD

So we blocked IFNγ in Mtb infected macaques and….the animals were fine. Turns out mice overestimate the importance of IFNγ in TB because IFNγ drives iNOS in mice but not macaques or humans. This means we don’t actually know how T cells suppress Mtb. rdcu.be/ff9GB #tuberculosis #immunology

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⟳ Репост от Gregor Weiss

I am happy to share a review I recently wrote on the design of peptide binders. It gives an overview of experimentally validated tools and discusses the challenges of why peptide design is more difficult than the design of classical protein binders. www.chimia.ch/chimia/artic...

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⟳ Репост от Gregor Weiss

📜The final version of our paper on eCIS firing is out: www.nature.com/articles/s41... Congrats to @xujwet.bsky.social @chipericson.bsky.social #cryoEM #CIS

Stepwise firing mechanism of an extracellular contractile injection system - Nature CommunicationsBacterial contractile injection systems (CIS) mediates cell-cell contacts, but the firing mechanism is unclear. Here, the authors employ a multimodal cryoEM approach and structure guided engineering t...www.nature.comPilhofer Lab 🦠❄️🔬

🧐Checkout our preprint revealing the stepwise firing💥 mechanism of a Contractile Injection System @xujwet.bsky.social&@chipericson.bsky.social trapped the complex by structure-guided engineering🧪 in multiple intermediate states and imaged them by multimodal #cryoEM❄️🔬 www.biorxiv.org/content/10.1...

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⟳ Репост от Gregor Weiss

Preprint 🧵! I’m really excited to introduce BIGSMALL, an interleaved multi-magnification cryo-ET scheme bridging molecular and cellular scales in a single acquisition! BIGSMALL = 𝐁road 𝐈nformation 𝐆athering 𝐒trategy by 𝐌ultiscale 𝐀cquisition of lame𝐋𝐋a www.biorxiv.org/content/10.6... (1/6)

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⟳ Репост от Gregor Weiss

VERY nice video, and a nice invention! Thanks again Miriam Weber who presented this at CryoNET 2025 in Umeå.

Gregor Weiss

New preprint 🚀 ❄️ We developed Autogrid-compatible HPF planchettes that enable direct freezing of clipped EM grids and streamline integration with cryo-FIB workflows ✔️ improved grid stability ✔️ reduced handling ✔️ robust vitrification (🦠 🧫 🧠) A step toward routine HPF for complex samples #teamtomo

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⟳ Репост от Gregor Weiss

Out now in @science.org Repurposing of a DNA segregation machinery into a cytoskeletal system controlling cell shape | Science www.science.org/doi/10.1126/...

Repurposing of a DNA segregation machinery into a cytoskeletal system controlling cell shapeBacteria, like eukaryotes, use conserved cytoskeletal systems for intracellular organization. The plasmid-encoded ParMRC system forms actin-like filaments that segregate low–copy number plasmids. In m...www.science.org
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⟳ Репост от Gregor Weiss

Now out in its final form! www.science.org/doi/10.1126/...

Science | AAASwww.science.orgMartin Loose

One of the most exciting discoveries from our lab so far is now online as a preprint! Read a story on how the ParMR and Min systems started to collaborate to create the CorMR cytoskeleton, which now controls cell shape in multicellular cyanobacteria: www.biorxiv.org/content/10.1...

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⟳ Репост от Gregor Weiss

We're excited to announce the beta-release of #RELION-5.1! 🥳 This release has important updates on our #amyloid processing pipeline, as described in this preprint: doi.org/10.64898/202... There are also some tweaks for #teamtomo. #OpenSoftwareAcceleratesScience

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