Katharina Geißler

Updated architectural model of the NPC from our lab, starred by bsky-less Agnieszka Obarska-Kosińska. Using cryo ET, XL-MS and modeling, we identify novel nucleoporins, among those the mRNA export complex TREX-2! Check out the preprint on biorxiv #TeamMassSpec #TeamTomo

Mammalian cells form hibernating disomes akin to those in bacterial cells - but connected via ribosomal RNA

www.science.org/doi/10.1126/...

co-first with: @andschwarz.bsky.social

with: @lea-dietrich.bsky.social, @sgiando.bsky.social, @erin-schuman.bsky.social and many more

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#MolBio 🧪

Ready to TANGO? 💃 In our new publication, Beata Turoňová & Markus Schreiber (@ms314.bsky.social, @becklab.bsky.social) present TANGO: the first cryoET framework to analyze the relation between particle positions and orientations 🪩 All in a single user-friendly package! #CryoET #OpenScience

Metabolically regulated proteasome supramolecular organization in situ Structural steps along the assembly of proteasome storage granules—membraneless organelles that form in response to metabolic shifts in yeast—are visualized inside cells by cryo-electron tomography. Inactive 26S proteasomes oligomerize into trimers, which assemble into paracrystalline arrays that serve as reservoirs of fully assembled proteasomes under conditions of low energy, ready for reactivation when glucose is restored.

Now online! Metabolically regulated proteasome supramolecular organization in situ

LLOMe has long been used to study lysosomal damage, yet how it works has remained a mystery.
Using cryo-electron tomography, we show it forms amyloid structures inside lysosomes that mechanically rupture membranes – revealing a new paradigm for lysosomal failure.

🔗 doi.org/10.64898/202...

#CryoET

This one was quite the journey! The paper describing the #ChlamyDataset is finally out and on the cover of Mol Cell!

This beautiful rendering made by co-author @jessheebner.bsky.social and Holly Peterson shows an instance of mitochondrial fission found in the dataset 😍

[Maybe long thread ahead]

Good guess, but Chlamy lacks 'canonical vaults'. My speculation for the lightbulb complex would be one of the five name-less Chlamy SPFH proteins (www.ebi.ac.uk/interpro/ent...), or maybe Prohibitins, though they’re usually IMM-localized in other organisms.

Take advantage of this fantastic opportunity to become part of the SCALE community! Several professorships and group leader positions are available at Goethe University and FIAS. We are looking for professors in the fields of molecular microbiology, cellular biochemistry, and molecular biochemistry.

Big thanks to the vault crew for the great teamwork! @jpkreysing.bsky.social @yuningwang.bsky.social @pchoffmann.bsky.social @meiercredo.bsky.social @hummerlab.bsky.social @deglushk.bsky.social bsky-less Agnieszka, Stefanie, Alex, Julian and @becklab.bsky.social for mentoring and support!

It’s out! Using cryo-ET in Dicty cells, we take a fresh in situ look at vaults. Surprisingly, we uncover vaults associated with ER and NE membranes, and find that many vaults enclose ribosomes in defined orientations, opening new avenues to their cellular function! www.biorxiv.org/lookup/conte...

Just published! We share an open-source workflow to measure membrane thickness from tomograms, including a tutorial with 3D visualizations. We analyze thickness variations across organelles and reflect on where to define a membrane boundary. @becklab.bsky.social #teamtomo rupress.org/jcb/article/...

cryoTIGER: deep-learning based tilt interpolation generator for enhanced reconstruction in cryo electron tomography - Communications Biology Deep learning-based interpolation using cryoTIGER enhances angular sampling in cryoET, improving 3D reconstructions, particle localization, and structural recovery without increasing electron dose.

❓What if you could peek between your tilt series ❓ We are proud to introduce cryoTIGER -- deep-learning based tilt interpolation for enhanced reconstruction in cryo-ET. A great collaboration between Turoňová lab, @becklab.bsky.social, @hummerlab.bsky.social #teamtomo www.nature.com/articles/s42...

great lipid probes promising exciting studies for (membrane) cell bio, such fascinating work!

The 3-decade-old competition that enabled the emergence and evaluate of AlphaFold has run out of NIH funding.

The program will be terminated in weeks.

This is terminating success.

www.science.org/content/arti...

🎉 We’re absolutely thrilled: SCALE has been selected as a DFG Excellence Cluster!
A huge thank you to our incredible team—this would not have been possible without your dedication and talent. 🙌 @dfg.de
#ClustersOfExcellence #SCALEcluster 🧵

Beautiful work by JP, Sergio, Johannes and colleagues!

Nuclear pores safeguard the integrity of the nuclear envelope Nature Cell Biology - Taniguchi et al. structurally analyse nuclear pore complex architecture in situ during differentiation, which is associated with mechanical constraints on the nuclear...

Excited to share our latest work on nuclear pore complex scaffold integrity and its perturbation. Now out in Nature Cell Biology: rdcu.be/eg4i9
Great work by Reiya Taniguchi who just opened his own research group back in Japan! 🥳

Another method from our lab on biorxiv! Automated classification and removal of flawed tilts in cryo ET data

Check out @deglushk.bsky.social 's method to measure membrane thickness in cryo electron tomograms!