🎉 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

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...

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,...

cell.com

Excited to share our preprint on Ignicoccus cell divison: only the inner membrane divides, progeny cells accumulate in cell clusters and pop-out! www.biorxiv.org/content/10.6... Great work with the labs: @buzzbaum.bsky.social @curiousdina.bsky.social @anja1.bsky.social @tbharat-lab.bsky.social

The life cycle of an archaeon with multiple membranes

Many prokaryotes are diderms. They divide using an FtsZ division ring to simultaneously constrict physically coupled inner and outer membranes to form daughter cells with two membranes. Currently, onl...

biorxiv.org

A wild publishing ride to get here... but finally! (first bioRxiv: January 5th, 2024 🙃) Amazing work from @lorenzlamm.bsky.social and colleagues 🤗 Special thanks to the community who jumped early on the boat, sharing feedback and training data to make MemBrain v2 a reality 🙏🏽

MemBrain v2: an end-to-end tool for the analysis of membranes in cryo-electron tomography - Nature Methods

MemBrain v2 enables streamlined analysis of membranes in cryo-electron tomography by providing user-friendly tools for membrane segmentation, membrane protein localization and spatial analysis, suppor...

nature.com

Check out our preprint on the structural mechanisms of how LEM2 and ESCRTs seal the nuclear envelope. Awesome collaboration with @karenpalacior.bsky.social who brought my structures to life 💃🔬❄️🌀 @hummerlab.bsky.social www.biorxiv.org/content/10.6...

Dear #CryoEM and #Microtubule enthusiasts, I’m thrilled to have been part of this exciting journey: www.biorxiv.org/content/10.6... We discovered and characterized a manchette-like microtubule machinery in Xenopus spermatids, likely involved in sperm reshaping and membrane reorganization. (1/3)

Imaging large fields-of-view at high resolution in cryo-ET with square beam montaging https://www.biorxiv.org/content/10.64898/2026.08.27.747605v1

Congrats to the authors of the two teams who discovered these enzymes! Ours here. 5/ www.biorxiv.org/content/10.6...

Enzymatic formation of a conserved isoaspartate in ribosomal protein uS11

Isoaspartate (isoAsp) formation is typically viewed as a "molecular clock" through nonenzymatic degradation of aspartate or asparagine during protein aging. Here we report a nearly universal enzymatic...

biorxiv.org

Molecular architecture of colossal surface layers from hyperthermophilic archaea Led by @idocaspy.bsky.social (Ido) In collaboration with @mkrupovic.bsky.social and @vikramalva.bsky.social labs doi.org/10.64898/202...

Out now in @natmicrobiol.nature.com: Bacillus subtilis builds protein filaments that act as a pseudomembrane, pulling quinone out of the bilayer and carrying it into the cytosol for reduction by NADH dehydrogenase, well away from the membrane itself. doi.org/10.1038/s415... 1/5

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 Plants

Using 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...

nature.com

Florent Waltz@florentwaltz.bsky.social · 8mo ago

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 🧵

How did octopuses evolve novel traits? Rishav Mitra, Richard Han, Trey Scott, et al serendipitously discover a unique ribosome adaptation that increases the accuracy of protein synthesis and evolved alongside their elaborate nervous systems vs deep sea relatives. www.biorxiv.org/content/10.6...

Incredibly proud of Messi Haile @mehsehret.bsky.social, a founding member of the Ho Lab, for her beautiful work uncovering the inner workings of a central piece of the malaria parasite invasion machinery: the malarial moving junction, out today in @cellpress.bsky.social! tinyurl.com/4p3md2eb 🦠❄️🔬

Excited to share our new preprint with the Yildiz and Janke labs on how Ndc80 and Ska complexes cooperate on microtubules through a SKA3 tether and tubulin tail interface to stabilize attachment! Congrats to Ju and Ipsita for leading this exciting study! www.biorxiv.org/content/10.6...

Really hyped to share our pre-print on mtDNA replication-fission ! @nanigrotjahn.bsky.social (doi: doi.org/10.64898/202...) 🧵with details below ⤵️

ATAD3A structurally links mtDNA replication and mitochondrial fission

Mitochondrial function depends on the maintenance of its genome, and disruptions in copy number and distribution are hallmarks of mitochondrial disorders. Mitochondrial DNA (mtDNA) replication is spat...

doi.org

Now published! We investigated how polyadenylated RNAs are targeted for decay in the human nucleus. www.nature.com/articles/s41... (1/5)

Cryo-ET gives unparalleled views of cellular structures, but targeted sample preparation by cryo-FIB milling has been a constraint. No longer! A new workflow yields close to 100% targeting success for centrioles & other small structures. Read the preprint ⤵️ www.biorxiv.org/content/10.6...

A Crossed Laser Phase Plate for CryoEM https://www.biorxiv.org/content/10.64898/2026.06.05.730245v1

Muyuan Chen: Gaussian Mixture Model-Based Focused Refinement for Enhanced Flexible Structure Determination in CryoEM and CryoET https://arxiv.org/abs/2605.30518 https://arxiv.org/pdf/2605.30518 https://arxiv.org/html/2605.30518

The molecular architecture of tunneling nanotubes www.biorxiv.org/content/10.64898/2026.05.27.728322v1 #cryoEM

"Mitochondria-lysosome coupling contributes to lysosome acidification and aging" Read more in Molecular Cell: www.cell.com/molecular-ce... Chuankai Zhou & colleagues @cp-molcell.bsky.social

Easymode: general pretrained networks for cellular cryo-ET enable flexible approaches to subtomogram averaging www.biorxiv.org/content/10.64898/2026.05.19.726344v1 #cryoEM

’m thrilled to share that our paper is out in Molecular Cell! We developed Ribo-Tweezer, a new technology that lets us rapidly and reversibly remove specific proteins from mature ribosomes to ask what they actually do in translation.

Thrilled to share the updated video of my paper in Nature with Maciej (under supervision of @simonemattei.bsky.social & @jomaalab.bsky.social) Proud to use Cryo-ET to uncover how hibernation factors are key to translation restart! To model PTMs in situ and render animations fulfilled my PhD dream!🥹🎉

EMBL@embl.org · 5mo ago

Despite its name, SNOR, a newly discovered protein, is hardly asleep on the job. EMBL researchers’ newest technologies allowed their scientific collaboration to discover a tiny protein with a big role in awakening cells from dormancy to restart protein synthesis. www.embl.org/news/science...

h44 😍 congratulations!

Katja Petzold@katjapetzold.bsky.social · 5mo ago

Imagine if one of RNA’s most common 3D contacts could switch off and on. We identified the A-minor switch that can reversibly “escape” their tertiary contacts, revealing a dynamic regulatory layer in RNA structure (shown by NMR & Cryo-EM and assayed in ribosomes). #RNA #NMR #dynamics #ribosome

Happy to share our preprint! Using massively parallel reporter assays, single-molecule imaging, deep learning and cryo-EM, we decode the sequence requirements for translation initiation and describe the “extended translation initiation sequence” (eTIS) that modulates start codon recognition. 🧵👇

Interleaved multi-magnification cryo-electron tomography bridges cellular and structural biology www.biorxiv.org/content/10.64898/2026.04.21.719848v1 #cryoEM

Another postdoc position for my lab is now open. This one is for a biochemist/cell biologist who really likes mitochondria and ubiquitin. If this is you, please apply here: www.seek.com.au/job/91277535

Biochemist/Cell Biologist Research Officer Job in Parkville, Melbourne VIC - SEEK

An excellent opportunity is available for a Research Officer / Senior Research Officer to join the Callegari Lab at WEHI.

seek.com.au

The cartwheel was first visualized ~70 years ago in the symbiont Trichonympha in the wood termite gut. We’ve discovered the cartwheel’s secret: a unique zigzag stacking of SAS-6 tetramers that facilitates the iconic 9-fold symmetry of cilia. #cellbiology #teamtomo #SAS6 #cartwheel

One of biggest mysteries in biology: how did complex eukaryotic cells evolve from simple microbes? ~1.8 billion years ago, an archaeal cell likely merged with a bacterium to form the first eukaryotic cell, but can we ever find direct evidence of this transformative event? 🦠 🚶‍♂️