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Tanja Mittag

@tanjamittag.bsky.social
545 followers 493 following 38 posts

Phase separation and disordered proteins! All comments/opinions are my own and are not representative of St. Jude.

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Reposted by Tanja Mittag
Doug Kojetin @dougkojetin.bsky.social · 23/09/2026
Apply today to be my colleague at Vanderbilt in the Department of Biochemistry! 
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James Fraser @fraserlab.com · 10/10/2026
Come be my colleague at UCSF! Our department BTS (like the K-pop band, but aka Bioengineering and Therapeutic Sciences) is searching for TWO new faculty members. Links, timeline, and why two searches in this thread 🧵
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James Fraser @fraserlab.com · 10/10/2026
I hear so much about the growing power of predictive biology, especially in drug discovery and "co-folding". I want to see people put their GPU budget where their mouth is!
CYP3A4
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Kresten Lindorff-Larsen @lindorfflarsen.bsky.social · 08/09/2026
In 2017 I co-organized a BPS thematic meeting on Conformational Ensembles from Experimental Data and Computer Simulations We're back in Berlin Aug 2027 with Biomolecular Dynamics: Integrating Experiments and Computation with a great line-up (to be revealed soon) www.biophysics.org/upcoming-the...
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Schwalbe Lab @schwalbe-lab.bsky.social · 21/08/2026
How to NMR with RNA? Together with @brukercorporation.bsky.social, we developed a practical tutorial on RNA NMR: from sample preparation and experiment setup to data analysis. A useful starting point for anyone getting into RNA NMR! www.bruker.com/en/products-... #RNA #NMR #StructuralBiology
bruker.com
NMR of Nucleic Acids
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St. Jude Children's Research Hospital @stjuderesearch.bsky.social · 18/08/2026
St. Jude has named Charles W.M. Roberts, MD, PhD, internationally recognized physician-scientist and director of the St. Jude Comprehensive Cancer Center, as its seventh president and CEO. The announcement is part of a planned leadership transition.
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St. Jude Children's Research Hospital @stjuderesearch.bsky.social · 05/08/2026
Researchers found that a synthetic gene-regulating compound called SynGR1 can recruit BRD4 to bypass gene-silencing structures without disrupting them and reactivate silenced genes. The findings point to new strategies for diseases like Friedrich’s ataxia and Huntington’s disease. 🧪 bit.ly/4hgkfb6
bit.ly
Restoring the silenced Friedreich’s ataxia gene through unconventional means
See how a synthetic gene regulating SynGR system desilenced the frataxin gene in Friedreich’s ataxia by shuttling BRD4 through HP1 condensates
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Castañeda Lab at SU @castanedalab.bsky.social · 30/07/2026
We are actively looking for a NMR facility manager for our growing NMR needs in Syracuse! This facility hosts an 800 with TCI cryoprobe (perfect for disordered protein research) and 600 with Prodigy cryoprobe. Please share with your communities!
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Tanja Mittag @tanjamittag.bsky.social · 30/07/2026
Congratulations, Allan!
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Craig M. Crews @craigmcrews.bsky.social · 25/07/2026
Biomolecular condensates can function as inherent catalysts: Molecular Cell www.cell.com/molecular-ce...
cell.com
Biomolecular condensates can function as inherent catalysts
Chen, Guo, Farag, Qian et al. present that biomolecular condensates formed by proteins lacking catalytic activity can mediate diverse hydrolysis reactions, highlighting the importance of condensate el...
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St. Jude Children's Research Hospital @stjuderesearch.bsky.social · 13/07/2026
St. Jude researchers discovered that the tumor suppressor SPOP switches between an inactive "double-donut" structure and active filaments. The findings reveal how certain cancer mutations alter SPOP activity and may inform new therapeutic strategies. bit.ly/3R5c7zx
stjude.org
SPOP ‘double-donut’ structure closes the loop on unexplained cancer mutations
See how an inactive tumor suppressor SPOP ‘double-donut’ state is converted to an active filament state with Cullin-3 to ubiquitinate key proteins like BRD4
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Tanja Mittag @tanjamittag.bsky.social · 18/07/2026
Excellent, thank you, Simon! 🎉
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Tanja Mittag @tanjamittag.bsky.social · 18/07/2026
Matt Cuneo, Mohamed-Raafet Ammar and Ömer Güllülü did a fantastic job and are sharing co-first authorship. Great contributions from all other authors. Out in Molecular Cell this week! www.sciencedirect.com/science/arti...
sciencedirect.com
Large-scale quaternary structural transitions underlie gain of function of SPOP cancer mutations
Speckle-type POZ protein (SPOP), a substrate receptor for the Cullin-3-RING (CRL3) ubiquitin ligase, is mutated in different cancers. Both activating …
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Tanja Mittag @tanjamittag.bsky.social · 18/07/2026
Regulation of SPOP activity via the double donut-filament equilibrium may explain why SPOP has evolved to form larger homo-oligomers than other ubiquitin ligase substrate receptors. Only long filaments can circularize and form rings whose equilibrium with filaments fine-tunes their activity. 7/n
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Tanja Mittag @tanjamittag.bsky.social · 18/07/2026
Activating mutations shift the equilibrium to enhance the filament population and thereby increase the apparent on-rate for substrates and their ubiquitination and result in oncogenesis. 6/n
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Tanja Mittag @tanjamittag.bsky.social · 18/07/2026
The double donuts are in exchange with the linear, active filaments. Why would nature come up with such a complicated regulatory mechanism? We speculate that the cell may to impinge on this equilibrium via PTMs to tip the equilibrium toward double donuts or filaments, in response to signals. 5/n
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Tanja Mittag @tanjamittag.bsky.social · 18/07/2026
The donuts turned out to be two rings, each formed by 22-30 SPOP monomers, associated via the substrate-binding MATH domains. The double donuts are 50 nm in diameter. A whole ribosome fits into the hole. The substrate binding site is therefore not accessible, and this is an autoinhibited state! 4/n
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Tanja Mittag @tanjamittag.bsky.social · 18/07/2026
When we systematically compared lots of cancer mutants by EM, we found that WT and inactivating mutants all appeared in a donut shape (that had not been previously observed) while the activating mutants looked like the previously described filaments. 3/n
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Tanja Mittag @tanjamittag.bsky.social · 18/07/2026
Prostate cancer patients have loss-of-function mutations in SPOP while endometrial cancer patients have gain-of-function mutations. The former inactivate the substrate binding site, the latter do not touch the substrate binding site and have been impossible to understand. How do they work? 2/n
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Tanja Mittag @tanjamittag.bsky.social · 18/07/2026
Our new paper on SPOP, a subunit of a Cullin-RING ubiquitin ligase that is heavily mutated in cancer patients. We are describing a large-scale, quaternary structural transition that converts an autoinhibited (double donut) state into the active state! kwnsfk27.r.eu-west-1.awstrack.me/L0/https:%2F...
static.klipy.com
Classic Glazed Donut
ALT: Classic Glazed Donut
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Kresten Lindorff-Larsen @lindorfflarsen.bsky.social · 15/07/2026
Join us in a fun, crazy and interesting interdisciplinary research project that combines protein biophysics, evolutionary genomics, biomolecular archaeology, and textile research to resolve species identity and post-translational modifications in the structural proteins collagen and keratin
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Prism Science @prismscienceorg.bsky.social · 29/06/2026
What's happening in protein dynamics research right now? Jaime & Stephanie break down NIH policy changes, preprints & the conformational ensembles conference. New episode up: diffuse.science/posts/TTPD-15/ #StructuralBiology
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Kresten Lindorff-Larsen @lindorfflarsen.bsky.social · 28/06/2026
It's nice when you benchmark your own method and find it good. But its even nicer when others benchmark your method and find it good. Table from doi.org/10.1101/2025... benchmarking our AF-CALVADOS approach (doi.org/10.1101/2025...)
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Magnetic Resonance News @nmr900.bsky.social · 26/06/2026
Professor Lewis E. Kay @lek-lab.bsky.social University of Toronto/SickKids, has been promoted to Companion of the Order of Canada, the highest level of the Order of Canada, for his pioneering biomolecular NMR research, and training a new generation of scientists www.gg.ca/en/appointme... #NMRchat 🧲
gg.ca
Order of Canada Appointees – June 26, 2026
Companions Michael Andrew Fox, C.C. Burnaby, British Columbia and New York, New York, United States of America
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Anders Sejr Hansen @andersshansen.bsky.social · 22/06/2026
(1/n) Very excited to share tri-lab collab (Mirny & Zechner) led by Harvey, Henrik & Jack: Q: How do enhancers & promoters interact in space (contact vs. action-at-a-distance) and time (stable vs. transient)? A: Transient E-P contact (~25-42 nm lasting ~10-20 sec): www.biorxiv.org/content/10.6...
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Nature Structural & Molecular Biology @natsmb.nature.com · 16/06/2026
New online: Structures of protein folding intermediates on the ribosome
dlvr.it
Structures of protein folding intermediates on the ribosome
Nature Structural & Molecular Biology, Published online: 16 June 2026; doi:10.1038/s41594-026-01814-7Atomistic structural ensembles of protein folding intermediates on the ribosome are resolved by comprehensive 19F nuclear magnetic resonance analyses integrated with molecular dynamics simulations, providing insights into cotranslational folding pathways.
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Christine Mayr @christinemayr.bsky.social · 08/06/2026
Finally out in @Cellcellpress! Proteins with long IDRs are prone to misfolding during protein synthesis. This is prevented by mRNA 3′UTRs that act as mRNA-based IDR chaperones. www.cell.com/cell/fulltex...
cell.com
mRNA 3′ UTRs chaperone intrinsically disordered regions to control protein activity
Highly conserved mRNA 3′ UTRs act as co-translational chaperones for intrinsically disordered regions (IDRs), preventing inter-domain misfolding and enabling biogenesis of fully active proteins.
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Tanja Mittag @tanjamittag.bsky.social · 08/06/2026
Congratulations, Christine! Super nice work!
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tenuretracker.info @tenuretracker.bsky.social · 07/06/2026
Extract: The Novo Nordisk Foundation Center for Protein Design at the University of Copenhagen seeks to appoint two group leaders in de novo protein design. Candidates should have strong backgrounds in computational and/or experimental protein design and an ambitious research and teaching plan.
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St. Jude Children's Research Hospital @stjuderesearch.bsky.social · 15/04/2026
Scientists at St. Jude developed patient-derived 3D tumor organoids and matched xenografts that preserve the molecular, genetic and cellular complexity of embryonal pediatric brain tumors. These models can speed functional assays and preclinical drug testing. ow.ly/vjSw50YK26w
ow.ly
3D tumor organoids give brain tumor researchers new scientific opportunities
Learn about brain tumor organoids developed by St. Jude scientists that preserve tumor diversity, enabling faster research and better access to research models
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Kresten Lindorff-Larsen @lindorfflarsen.bsky.social · 14/04/2026
Run an MD simulation of any protein in the AlphaFold Protein Structure Database using AF-CALVADOS Thanks to @sobuelow.bsky.social AF-CALVADOS is now on Colab colab.research.google.com/github/KULL-...
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Kresten Lindorff-Larsen @lindorfflarsen.bsky.social · 23/03/2026
Do you want to be my boss? We are looking for a new Head of Department Our Department covers biology broadly, from molecular biophysics 🧬 to ecology 🌱 & biodiversity 🐋, and coordinates teaching in several BSc and MSc programmes🧑‍🎓 Located in Copenhagen, one of the world's most liveable cites 🚲 🌞 🌥️
The call including details on how to apply:
https://candidate.hr-manager.net/ApplicationInit.aspx?cid=3010&ProjectId=158638&DepartmentId=19974&MediaId=4917

Job and person profile:
https://employment.ku.dk/documents/job-and-personal-profile-bio.pdf
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xavier salvatella @xsalvatella1.bsky.social · 16/03/2026
Happy to announce that my institution, @irbbarcelona.org, is opening two group leader positions, 1 in chemical biology and 1 in structural biology, to strengthen our expertise in molecular sciences: please spread the word !
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Kresten Lindorff-Larsen @lindorfflarsen.bsky.social · 21/03/2026
New preprint on how disagreement among variant effect predictors can help guide prioritization of proteins for experimental analysis Work led by Nicolas F Jonsson in a collaboration with Joe Marsh. Preprint: doi.org/10.64898/202... @vxh357.bsky.social @jmarshlab.bsky.social 1/6
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Kresten Lindorff-Larsen @lindorfflarsen.bsky.social · 16/03/2026
We are hiring a postdoc in computational biophysics and machine learning studies of intrinsically disordered proteins We aim to study the function of IDPs by combining CG MD, ML and bioinformatics in collaboration with @tanjamittag.bsky.social & @rhp-lab.bsky.social tinyurl.com/REWIRE-PD
Postdoc position:Computational Biophysics of Disordered Proteins, Lindorff-Larsen group, University of Copenhagen, Denmark

https://tinyurl.com/REWIRE-PD
Deadline May 3rd, 2026
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xavier salvatella @xsalvatella1.bsky.social · 16/03/2026
Our work on how oligomerization can enable selectively targeting intrinsic disorder with small molecules is now out in Science Advances: www.science.org/doi/10.1126/...). Congratulations Stase Bielskute and @borjaml.bsky.social and thanks to the collaborators and funders !
science.org
Oligomerization enables the selective targeting of an intrinsically disordered region by a small molecule
The druggability of intrinsically disordered regions.
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IDPSeminars @idpseminars.bsky.social · 04/03/2026
IDPSeminars is back TOMORROW! Come see @tanjamittag.bsky.social and @xsalvatella1.bsky.social ! Not to be missed!!
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Alex Holehouse @alexholehouse.bsky.social · 12/02/2026
Pleased to share the final version of this behemoth of a paper, now finally published. I guess I can retire now? www.nature.com/articles/s41... More functional data, many thousands of words removed, and a few other updates from last year's preprint.
nature.com
Sequence and chemical specificity define the functional landscape of intrinsically disordered regions - Nature Cell Biology
Langstein-Skora, Schmid, Huth et al. propose that intrinsically disordered region functionality can be driven by the interplay between linear binding motifs and contextual chemical characteristics suc...
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Tanja Mittag @tanjamittag.bsky.social · 07/02/2026
It was a pleasure to write the review on the role of phase separation in transcription together with you, @bsabari.bsky.social, Mikayla and Ambuja. I learnt a lot!
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Tanja Mittag @tanjamittag.bsky.social · 06/02/2026
Faculty retreat of @stjuderesearch.bsky.social today. We see evidence everywhere of how Jim Downing shaped the vision for St. Jude over the last twenty years. The results are cutting edge fundamental science, St. Jude Global and important new initiatives. Inspiring!
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Kresten Lindorff-Larsen @lindorfflarsen.bsky.social · 05/02/2026
New preprint with work led by @asrauh.bsky.social in which we explore how double mutant cycles could be used to study molecular interactions in condensates, and highlight difficulties in extracting information about interactions from mutational experiments www.biorxiv.org/content/10.6...
Probing interactions with a double mutant cycle
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Magnus Kjærgaard @proteinmagnus.bsky.social · 02/02/2026
Does targeting enzymes and substrates in a condensate lead to rate enhancement? No. Here, we investigate how the condensate environment can inhibit an enzyme reaction. Spoiler: Mass-transport limitations. We find a strong correlation between diffusion and reaction rates. doi.org/10.64898/202...
Graphical abstract of pre-print
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Ben Sabari @bsabari.bsky.social · 23/01/2026
I am recruiting postdoctoral fellows to develop new research directions in the lab. We study transcriptional regulation through biomolecular condensates in development and disease, with an emphasis on first-principles and mechanistic discovery. Please repost or share with colleagues.
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Kresten Lindorff-Larsen @lindorfflarsen.bsky.social · 18/01/2026
Second preprint of the year in which @sarahgersing.bsky.social from @rhp-lab.bsky.social mapped the effects of >7500 variants in glucokinase (GCK) on the interaction with the glucokinase regulatory protein so that we now have a 3D GCK scan (abundance, interaction, activity) doi.org/10.64898/202...
Figure 2 from the paper with: (A) Heatmap showing the interaction score of each possible amino acid substitution along the GCK sequence. (B) Interaction score distributions of missense, synonymous and nonsense variants.  (C) The median interaction score of each GCK residue mapped onto the structure of the GCK–GKRP complex.
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Dr. Allyson Sgro @allysonsgro.bsky.social · 09/01/2026
Are you a junior scientist working in theoretical biophysics? @zamakany.bsky.social and I are organizing another workshop this fall here at @hhmijanelia.bsky.social. Travel and the workshop expenses are all covered! tinyurl.com/yc66fawc
tinyurl.com
Junior Scientist Workshop on Theoretical Biophysics
Attendees will have the opportunity to present as well as learn from one another. They will give 20-minute talks on their own research questions, as well as in-depth 45-minute whiteboard tutorials on
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IDPSeminars @idpseminars.bsky.social · 06/01/2026
IDPSeminars is BACK THIS WEEK! Talks from Andrea Soranno and @bokaizhulab.bsky.social on Thursday! 1 pm EST / 7 PM European time! Sign up here: forms.gle/3yCHeYvuuqLh... And check out the full Spring 2026 schedule at idpseminars.com!
Seminar titles: Andrea Soranno (Single molecule spectroscopy of
disordered regions and nucleic acids) and Bokai Zhu (Nuclear speckle rejuvenation to ameliorate proteinopathy).
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Rohit V. Pappu @rohitpappu68.bsky.social · 19/12/2025
Nuclear speckle associated RRM-containing proteins are block copolymers. They make size-limited, ordered microphases, tens of nm in size comprising tens of molecules. Speckles are likely clusters or emulsions of distinct microphases and not macrophases www.sciencedirect.com/science/arti...
sciencedirect.com
Nuclear speckle proteins form intrinsic and MALAT1-dependent microphases
Pre-mRNA processing components in nuclear speckles encompass one or more folded RNA recognition motifs (RRMs) and disordered regions with specific seq…
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Lukasz Bugaj @bugajlab.bsky.social · 16/12/2025
🚨New preprint(1/2)! We show that RTK fusion oncoproteins broadly suppress EGFR signaling. How? Sequestration of adapters as the shared principle. Led by superb PhD student Carol Gao. www.biorxiv.org/content/10.1... Implications for drug tolerance/resistance, and includes one big surprise🫧.👇
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Kresten Lindorff-Larsen @lindorfflarsen.bsky.social · 10/12/2025
Hey that’s us 🎉
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Kresten Lindorff-Larsen @lindorfflarsen.bsky.social · 09/12/2025
Our review on Integrative modelling of biomolecular dynamics 💃 is now live at COSB We discuss approaches to integrate computational methods with time-dependent & time-resolved experiments to study protein dynamics With @dariagusew.bsky.social & Carl G. Henning Hansen doi.org/10.1016/j.sb...
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