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Sergio Cruz-León

@sergiocruzleon.bsky.social
444 followers 716 following 10 posts

Theoretical and computational biophysics | Postdoc at Hummer's lab @hummerlab.bsky.social | PhD at @mpibp.bsky.social | MSc. @unistuttgart.bsky.social | Physics at @uniandes.bsky.social 🇨🇴 🇩🇪 🇪🇺

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Reposted by Sergio Cruz-León
Jan Philipp Kreysing @jpkreysing.bsky.social · 13/07/2026
Delighted that our story on chromatin architecture inside human cells is now published — the last chapter of my PhD. It was a pleasure working with @sergiocruzleon.bsky.social, @johannesbetz.bsky.social, and everyone involved. #teamtomo www.nature.com/articles/s41...
nature.com
Molecular architecture of heterochromatin at the nuclear periphery of primary human cells - Nature Communications
The 3D organisation of chromatin inside a human cell is still not fully resolved. Here the authors reveal that in situ cryo-ET resolves individual nucleosomes and predicts DNA linkers, thus showing th...
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Brady Johnston @bradyajohnston.bsky.social · 03/07/2026
The paper is out which means the MD trajectories are finally available! #MolecularNodes #b3d #GeometryNodes
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Max Planck Institute of Biophysics @mpibp.bsky.social · 19/06/2026
1/3: We are proud to share that the recent work by postdocs Karen Palacio-Rodriguez and Sergio Cruz-León, from Gerhard Hummer’s department, was selected as one of the Editors’ Highlights in Nature Communications! 🎉 👏 Open-access paper: 👉 www.nature.com/articles/s41...
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Claudia Alen Amaro @claudialen.bsky.social · 29/01/2026
The scientific part of the event starts with a talk by @sergiocruzleon.bsky.social on bridging in-situ cry-ET and multi scale simulations
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Sergio Cruz-León @sergiocruzleon.bsky.social · 13/01/2026
We resolved the molecular architecture of a condensate—inside cells. 🤯 By combining in situ cryoET with multiscale simulations, we show how a single point mutation modifies molecular interactions, shifts the condensate’s material properties, and alters its biological function. Preprint 👇
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Katharina Geißler @kgeissler.bsky.social · 16/12/2025
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...
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Heilemann Lab @heilemannlab.bsky.social · 28/11/2025
We developed a 'smart STED microscope' to detect rare objects/events in cells, and unraveled the 3D morphology of a nuclear membraneless organelle (paraspeckle). Amazing collaboration with Sjoerd Stallinga, Bernd Rieger (TU Delft) and @mixmue.bsky.social 🙏 (1/3) www.nature.com/articles/s41...
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Desislava Glushkova @deglushk.bsky.social · 06/11/2025
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/...
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Max Planck Institute of Biophysics @mpibp.bsky.social · 30/10/2025
SNDing proteins into the membrane! Our new publication from @melaniemcdowell.bsky.social ’s group identifies the SND3 protein as a new route for membrane protein insertion! 🍄 📘 Read more here: www.mpg.de/25599408/102... Image: Louise Duever.
Structure of the ribosome-bound SND3 translocon complex from the heat-tolerant fungus Chaetomium thermophilum. The SND3 translocon inserts proteins into the endoplasmic reticulum membrane as they are produced by the ribosome.
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Communications Biology @commsbio.nature.com · 15/10/2025
Deep learning-based interpolation using cryoTIGER developed by the authors in this new Communications Biology manuscript enhances cryoET reconstructions. @mpibp.bsky.social @becklab.bsky.social @jpkreysing.bsky.social @sergiocruzleon.bsky.social doi.org/10.1038/s420...
doi.org
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.
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Max Planck Institute of Biophysics @mpibp.bsky.social · 29/09/2025
🎉 Congratulations to our postdoc @sergiocruzleon.bsky.social for receiving the 2026 Theory & Computation Postdoctoral Research Award from the Biophysical Society! 🎉 Sergio will present his work at the Theory & Computation subgroup Symposium during the 2026 Biophysical Society meeting.
Photo of Sergio Cruz and text: Sergio Cruz-León receives the 2026 Theory & Computation Postdoctoral Research Award
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Typas Lab @typaslab.bsky.social · 30/07/2025
Ready to lead pioneering research that bridges systems-level investigations of biological systems to molecular mechanism? The EMBL Molecular Systems Biology Unit in Heidelberg is hiring a Group Leader!
embl.wd103.myworkdayjobs.com
Group Leader – Molecular Systems Biology Unit
Are you ready to lead groundbreaking research in Molecular Systems Biology? Join us at EMBL! We are seeking a motivated scientist to lead an independent research group, addressing original biological ...
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Miro Astore @miroastore.bsky.social · 23/07/2025
That's a wrap! The results of the first #cryoEM heterogeneity challenge are up on biorxiv! biorxiv.org/content/10.110
biorxiv.org
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Melanie McDowell @melaniemcdowell.bsky.social · 12/07/2025
Proud to share our first lab pre-print: “SND3 is the membrane insertase within a fungal multipass translocon” where @tzujingyang.bsky.social solved the structure of a ribosome-associated SND3-translocon complex involved in ER membrane protein insertion ➡️ doi.org/10.1101/2025...
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Jan Philipp Kreysing @jpkreysing.bsky.social · 11/04/2025
New preprint on 3D heterochromatin architecture in human cells! Great collab with @sergiocruzleon.bsky.social & @johannesbetz.bsky.social from @hummerlab.bsky.social, @marinalusic.bsky.social & the Turoňová lab. Many thanks to my supervisor @becklab.bsky.social. bioRxiv: tinyurl.com/3a74uanv 🧵👇
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Sergio Cruz-León @sergiocruzleon.bsky.social · 11/04/2025
Excited to share our preprint on the molecular architecture of heterochromatin in human cells 🧬🔬w/ @jpkreysing.bsky.social, @johannesbetz.bsky.social, @marinalusic.bsky.social, Turoňová lab, @hummerlab.bsky.social @becklab.bsky.social @mpibp.bsky.social 🔗 Preprint here tinyurl.com/3a74uanv
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Kresten Lindorff-Larsen @lindorfflarsen.bsky.social · 25/03/2025
Our paper on prediction of phase-separation propensities of disordered proteins from sequence is now published: www.pnas.org/doi/10.1073/... The paper has been substantially updated compared to the preprint including new experimental data and using the neural network to finetune CALVADOS. 1/n
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Rommie Amaro @rommieamaro.bsky.social · 28/03/2025
✨✨ It's #glycotime for #HIV Env ✨✨ N-linked glycans modulate flexibility & MPER epitope exposure #glycotime Huge effort by @shehata92.bsky.social @lcasalino88.bsky.social with cryoET of Env in VLPs by @thevillalab.bsky.social & team 💪 Would love feedback! www.biorxiv.org/content/10.1...
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Gräter lab @graeterlab.bsky.social · 04/04/2025
Job alert: Join us in Mainz as Max Planck Research Group Leader (W2) in Molecular Design ...and make your own research dreams happen on de novo design, generative models, proteins, materials ... tinyurl.com/r2xjxnuk @mpip-mainz.mpg.de
tinyurl.com
Max Planck Research Group Leader (W2) in Molecular Design
We are looking for exceptional early-career scientists conducting computational research with a proven record of accomplishment. The primary focus of this call is on candidates proposing research on b...
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Sven Klumpe @svenklumpe.bsky.social · 09/04/2025
Thrilled to share these experiments on shaping focused ion beams to explore different ways of milling. Here, we explore using different beam geometries to generate cellular thin sections/lamellae. The video shows elongating the beam on a charging spot burn www.biorxiv.org/content/10.1...
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Jan Philipp Kreysing @jpkreysing.bsky.social · 09/04/2025
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! 🥳
rdcu.be
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...
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Sven Klumpe @svenklumpe.bsky.social · 05/03/2025
Happy to share our manuscript on the in situ visualization of the copia retrotransposon in its final form today published in @cellcellpress.bsky.social www.cell.com/cell/fulltex.... What’s new?
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Giovanni Bussi @bussigio.bsky.social · 20/02/2025
Interested in #RNA modelling across multiple scales? Join us for the @cecamevents.bsky.social meeting at SISSA, Trieste, May 19-22! www.cecam.org/workshop-det... We still have slots for contributed talks. Deadline March 23. Co-organized with @magistratolab.bsky.social and @marcodevivo.bsky.social
cecam.org
CECAM - RNA modelling across scales
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CompBioPhys @compbiophys.bsky.social · 18/02/2025
🤩 Highly optimized software running on a SOA #HPC cluster provides sufficient #computing power to #simulate #biomolecular systems at the mesoscale of viruses and organelles, and potentially small cells in the near future... Want to know more? Check out our paper 📑 in #JCC 🔗 doi.org/10.1002/jcc....
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Jim Hurley @jimhurley.bsky.social · 06/02/2025
Excited to see work led by @autophazeke.bsky.social, @minghaochen.bsky.social, Thanh Nguyen, and Ainara Claveras out in @science.org today, the culmination of a 15-year project to understand structurally how the synthesis of the critical lipid of autophagy, PI3P, is regulated. tinyurl.com/ywvjh8u4
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Max Planck Institute of Biophysics @mpibp.bsky.social · 31/01/2025
Exciting green news! 🦠 Do you know how certain microorganisms make a living by transforming CO2 into useful molecules? Check out our new work on the molecular choreography behind acetyl-CoA synthesis in the CODH/ACS protein complex. 👩‍🔬 🔗 www.biophys.mpg.de/2844976/micr...
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Bianca Introini @bianca-introini.bsky.social · 27/01/2025
I am very happy to share our latest work on the detailed cryo-EM structure of the NDH-PSI supercomplex of spinach. Thanks to Werner Kühlbrandt, Alex Hahn and @mpibp.bsky.social ! 🍃❄️🔬 You can find the paper in open access in Nature Structural and Molecular Biology: www.nature.com/articles/s41...
nature.com
Cryo-EM structure of the NDH–PSI–LHCI supercomplex from Spinacia oleracea - Nature Structural & Molecular Biology
Here, the authors report the structure of the nicotinamide adenine dinucleotide phosphate dehydrogenase–photosystem I–light-harvesting complex I supercomplex, providing insights into subunit interacti...
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Beck Laboratory @becklab.bsky.social · 17/01/2025
In a great collaboration with @hummerlab.bsky.social and the Kräusslich lab: HIV capsid doesn't break at the NPC; instead, it cracks open the NPC itself! Details in Cell: authors.elsevier.com/sd/article/S... @mpibp.bsky.social @uniheidelberg.bsky.social A thread below:
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Bussi Lab @bussilab.org · 16/01/2025
Our research presented at @freieuniversitaet.bsky.social ! @bussigio.bsky.social will give a CRC colloquium presenting our recent applications of integrative methods and enhanced sampling to #RNA dynamics. Host: @cecclementi.bsky.social www.mi.fu-berlin.de/en/sfb1114/e...
mi.fu-berlin.de
January Colloquium
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Jim Hurley @jimhurley.bsky.social · 09/01/2025
PhDs in biochemistry, structural biology, pharmacology, or similar, located in the US and with strong publication track records and a high motivation to solve Parkinson's, please send CV directly to me at jimhurley@berkeley.edu. Repost appreciated.
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Wilfling Lab @wilflinglab.bsky.social · 08/01/2025
Check out our latest publication in @naturecellbiology.bsky.social on the role of phase separation in selective autophagy initiation! This was done in a fantastic collaboration with ‪@kraftlabfr.bsky.social‬ www.nature.com/articles/s41... Short teaser below 👇👇👇
nature.com
Phase separation of initiation hubs on cargo is a trigger switch for selective autophagy - Nature Cell Biology
Licheva, Pflaum, Babic, Mancilla et al. show that low-affinity cargo–receptor interactions promote autophagy receptor mobility and condensation of the scaffold protein Atg11 to trigger initiation hub ...
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Martin Vögele @martinvoegele.bsky.social · 07/01/2025
Molecular simulations or AI models produce ever larger and more complex datasets. Comparing different conditions to find meaningful patterns is a bottleneck for many projects. We address this with PENSA, a flexible open-source analysis library. Now out in JCP: doi.org/10.1063/5.02... 🧪 #CompChem
doi.org
Systematic analysis of biomolecular conformational ensembles with PENSA
Atomic-level simulations are widely used to study biomolecules and their dynamics. A common goal in such studies is to compare simulations of a molecular system
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Jan Lammerding - Lab @lammerdinglab.bsky.social · 29/12/2024
Exciting work by Martin Beck’s group @mpibp.bsky.social providing further evidence for nuclear pores responding to mechanical stress. The work includes some nice modeling estimating the fluid flow across nuclear pores as a function of (osmotic) pressure. www.cell.com/molecular-ce...
cell.com
Nuclear pore permeability and fluid flow are modulated by its dilation state
Hoffmann et al. describe within cells how the Dictyostelium discoideum nuclear pore complex structure constricts and dilates as a consequence of osmotic stress. Based on their experimental findings, they propose a hydrodynamics model and quantify fluid flow across nuclear pore complexes under conditions when nuclei change their volume rapidly.
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Siewert-Jan Marrink @cg-martini.bsky.social · 27/12/2024
Happy ending (of the year): the release of our preprint, "The Martini 3 Lipidome: Expanded and Refined Parameters Improve Lipid Phase Behavior", now available on @ChemRxiv. 👉 Read the full preprint here: chemrxiv.org/engage/chemr... and get the parameters here: github.com/Martini-Forc...
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SCALE - SubCellular Architecture of LifE @scale-cluster-ffm.bsky.social · 23/12/2024
Introducing cryoTIGER - a computational alternative to denser sampling during tilt series acquisition in cryo-ET. Congratulations to SCALE @scale-cluster-ffm.bsky.social members Beata Turonova @mpibp.bsky.social, Martin Beck @becklab.bsky.social & Gerhard Hummer @hummerlab.bsky.social
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Jan Philipp Kreysing @jpkreysing.bsky.social · 13/12/2024
Exciting times in HIV research and prevention! HIV capsid is a great drug target because it's not just a protective shell for the viral genome but also a key facilitator for HIV entering the nucleus via the nuclear pore (NPC).
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bioRxivpreprint @biorxivpreprint.bsky.social · 21/12/2024
cryoTIGER: Deep-Learning Based Tilt Interpolation Generator for Enhanced Reconstruction in Cryo Electron Tomography www.biorxiv.org/content/10.1101/202…
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