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Danielle Grotjahn

@nanigrotjahn.bsky.social
1.5K followers 759 following 54 posts

Associate prof @ Scripps Research grotjahnlab.org #teamtomo #mitochondriac

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Reposted by Danielle Grotjahn
Kathiravan Ezhilan @kathiravan-ezhilan.bsky.social · 16/07/2026
In #cryoET, separating closely apposed membrane segmentations into distinct labels can be difficult. Small artefacts may connect otherwise separate membranes, requiring tedious slice-by-slice correction. To address this, @jasmred.bsky.social and I developed MemSplit, a napari based workflow.
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Danielle Grotjahn @nanigrotjahn.bsky.social · 08/07/2026
Surface Morphometrics makes it to ChimeraX! 🤩 nice work @baradlab.com!!
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Reposted by Danielle Grotjahn
Jonathan Friedman @labfriedman.bsky.social · 29/06/2026
New preprint from our lab! We uncover how a subset of mitophagy proteins BNIP3 and NIX are repressed and protected from turnover, we think so that they can perform a surveillance role to detect mitochondrial dysfunction under basal conditions. t.co/4XKkd4LsFi
t.co
https://www.biorxiv.org/content/10.64898/2026.06.25.734517v1
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Danielle Grotjahn @nanigrotjahn.bsky.social · 29/06/2026
New Grotjahn lab preprint from superstar postdoc @nitishdua.bsky.social! Check out all the deets in the 🧵 below. IMO, it’s a great example of how studying the local microenvironment with #teamtomo can reveal biology that would otherwise remain hidden. #mitochondria #morphometrics
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Yamuna Krishnan @krishnanyamuna.bsky.social · 22/06/2026
1/ Mitochondrial Na⁺ links metabolism, Ca2+ signaling and disease. We know how it gets in, how it gets out, and proteins that use it. But: we've never actually seen Na⁺ in single mitochondria in live cells. We started with an unusual observation, went down a rabbit hole & found some cool biology .
A mitochondrion showing Ca2+ entering through the MCU, exchanged for Na+ by NCLX, Complex I acting as a Na+/H+ exchanger, and various transporters that use Na+ to move their substrates in and out of the mitochondria
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Jan-Hannes Schaefer @jhschaef.bsky.social · 19/06/2026
Bacteriophage tails co-enrich with ex vivo amyloids from amyloidosis patients. Cryo-EM reveals Siphoviridae tail tube protein in ALys and AL amyloid extract. Do phages interact with human amyloids? @landerlab.bsky.social @nanigrotjahn.bsky.social & Kelly Lab #cryoEM #b3d doi.org/10.64898/202...
blender rendering of amyloids with phage tail tubes
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Danielle Grotjahn @nanigrotjahn.bsky.social · 16/06/2026
Cryo-ET is often framed as a tool for in situ protein structure. But what if the real revolution is contextualization? I explore how #teamtomo is redefining what "local" means in organelle biology, revealing membrane states rather than just protein structures. tinyurl.com/localmembrane
sciencedirect.com
Think globally, act locally: Redefining organellar membrane environments through cryo-electron tomography
Early enthusiasm for the “cellular revolution” in cryo-electron tomography (cryo-ET) was largely driven by the promise of resolving protein structures…
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bioRxiv Cell Biology @biorxiv-cellbio.bsky.social · 10/06/2026
Mitochondrial-derived compartments buffer outer membrane protein load during acute mitochondrial adaptation www.biorxiv.org/content/10.64898/20…
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bioRxiv Cell Biology @biorxiv-cellbio.bsky.social · 10/06/2026
Structural Mechanism and Cellular Restriction of Tau Seeding from Endolysosomes www.biorxiv.org/content/10.64898/20…
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Tanmay Bharat @tbharat-lab.bsky.social · 25/05/2026
Sub-cellular chemical mapping using correlated cryogenic electron and mass spectrometry imaging online @natmethods.nature.com, led by Hannah Ochner, collaboration with @catfranco.bsky.social and @kiranrpatil.bsky.social labs doi.org/10.1038/s415...
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Danielle Grotjahn @nanigrotjahn.bsky.social · 11/05/2026
The 11th International #teamtomo Congress is coming to Madison, Wisconsin! As a proud Madison native, I can confirm: August 9–12 is peak Wisco weather ☀️ stoked for exciting science, friendly people, and warm nights @ the Union Terrace Abstract deadline: May 14 cryoem.wisc.edu/11th-interna...
cryoem.wisc.edu
11th International Congress on Electron Tomography
We are pleased to announce the 11th International Congress on Electron Tomography, taking place August 9 – 12, 2026, in Madison, WI. This landmark gathering will bring together leading researchers, mi...
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Danielle Grotjahn @nanigrotjahn.bsky.social · 03/05/2026
“pineapples 🍍 for everyone!” — @dtegunov.bsky.social
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Dimitry Tegunov @dtegunov.bsky.social · 03/05/2026
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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Jan-Hannes Schaefer @jhschaef.bsky.social · 07/04/2026
We identified the maltoside detergent DM as an effective and easy solution to address preferred orientation in cryo-EM. Helped me switch from graphene grids. Special congrats to Maria Rafiq! @landerlab.bsky.social @nanigrotjahn.bsky.social @wisemanlab.bsky.social #cryoEM doi.org/10.64898/202...
Blender Rendering of vitrified HA trimer with DM at the air-water interface
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Danielle Grotjahn @nanigrotjahn.bsky.social · 24/03/2026
Fun collaboration with the Herzik lab! Very cool to see #TeamTomo + STA directly capture the effects of the AWI at the single-particle level. we know it’s happening, but it’s striking to see it so clearly!
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Brian Cook @bcryo.bsky.social · 23/03/2026
1) The Herzik lab is excited to announce our newest preprint in collaboration with the Grotjahn lab! We have developed a surfactant cocktail that seeks to overcome one of the more nefarious problems in #cryoEM, Air-water interface (AWI)-induced damage and preferred orientation (PO).
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FocalPlane @focalplane.bsky.social · 19/03/2026
🔬🔦In their FocalPlane post, @mmedina300kv.bsky.social, @attychang.bsky.social, @baradlab.com, @nanigrotjahn.bsky.social and team describe how they have extended Surface Morphometrics to measure membrane thickness in cells. focalplane.biologists.com/2026/03/18/b...
focalplane.biologists.com
Back to the density: using Surface Morphometrics to measure organelle membrane thickness in cryo-electron tomography - FocalPlane
Back to the density: using Surface Morphometrics to measure organelle membrane thickness in cryo-electron tomography - Tools
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Vanderbilt Center for Structural Biology @vanderbiltcsb.bsky.social · 09/02/2026
Registration is open for Bridging Atoms and Algorithms: A Symposium on AI and Structural Biology! 📅 March 17-18, 2026 🏫 Vanderbilt University in Nashville, TN ℹ️ vanderbilt.edu/csb/caipd-ai... #CryoET #AI #protein #research #CryoEM #Biology @rommieamaro.bsky.social @drgregbowman.bsky.social
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Journal of Cell Biology @jcb.org · 09/03/2026
“Our goal is not simply to resolve structures, but to uncover how molecular organization shapes cellular function. Being highlighted by JCB affirms that this integrative approach is both valued and necessary”— Dr. Danielle Grotjahn (@nanigrotjahn.bsky.social) Learn more 👉 hubs.la/Q0442hKP0
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Ardem Patapoutian @ardemp.bskyverified.social · 04/03/2026
New paper from the lab led by @ericmulhall.bsky.social addresses how PIEZO1 and PIEZO2 are tuned to different types mechanical forces. From nanometer-scale super-resolution microscopy to in vivo experiments, links single-molecule observations to physiological function. www.nature.com/articles/s41...
nature.com
The molecular basis of force selectivity by PIEZO2
Nature - PIEZO2 is intrinsically more rigid than PIEZO1, and disparate mechanical stimuli paradoxically evoke opposite conformational and gating responses in each channel.
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Journal of Cell Biology @jcb.org · 03/03/2026
“I’m grateful to be included in a journal with such a strong legacy in defining and advancing the field of cell biology.”— Dr. Danielle Grotjahn (@nanigrotjahn.bsky.social). JCB is where the world meets your research. Learn more. hubs.la/Q0442hKP0
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American Society for Cell Biology @ascbiology.bsky.social · 06/02/2026
From cartoon models to quantitative structural maps: learn how cryo-electron tomography is reshaping studies of cellular organization. Danielle Grotjahn, Ph.D., shares where cryo-ET excels, its challenges, and how it fits into today’s imaging toolbox.
ascb.org
Bridging Cellular and Structural Biology Through Cryo-electron Tomography - ASCB
Cellular cryo-electron tomography (cryo-ET) holds the grand promise of integrating cellular architecture with molecular structure. Yet, for many cell biologists, this method can seem technically…
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Danielle Grotjahn @nanigrotjahn.bsky.social · 01/02/2026
Are you a cell biologist who secretly thinks cellular cryo-electron tomography is just George Palade-era EM, but fancier? Join this webinar to see how modern #teamtomo has shifted from pretty pictures to quantitative, local membrane biology, and how that changes the questions we can ask.
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Gregor Weiss @weiss-lab.bsky.social · 19/01/2026
🔬 Postdoc position – Infection Biology & Cryo-ET (Zurich) 🇨🇭 We are looking for a motivated Postdoc to join our interdisciplinary team. 📩 Interested? Check out the job advert: www.imm.uzh.ch/dam/jcr:cb17... 👉 More info on the lab: www.weiss-laboratory.com Please share with interested colleagues!
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Reposted by Danielle Grotjahn
Scripps Research @scripps.edu · 15/01/2026
Reported in #JCellBiol, a method developed in the lab of Associate Professor Danielle Grotjahn (@nanigrotjahn.bsky.social) measures membrane thickness directly inside intact cells and identifies ATP synthase clusters in curved, unusually thick membrane regions.
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Scientists measure cellular membrane thickness inside cells for the first time
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Danielle Grotjahn @nanigrotjahn.bsky.social · 06/01/2026
#teamtomo gets another quantitative cell biology tool! We extend our Surface Morphometrics pipeline to measure membrane thickness. Alongside many biological findings, we show that our 3D measurements closely match in vitro vesicle measurements from 2D EM (collab w/Neal Waxham and Fred Heberle).
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Ye Lab @liye-tsri.bsky.social · 22/12/2025
Thrilled to share our latest work--combining CATCH with whole-body HYBRiD imaging, leveraging click chemistry to visualize and identify drug-targeted cells across organ systems. Led by a brilliant team: former PhD student Ben Pang and former undergrad Verina Leung.
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Danielle Grotjahn @nanigrotjahn.bsky.social · 22/12/2025
JCB’s Cover of the Year voting is open! I’ll just say… they are all gorgeous, but April has my heart 😍❄️🔬 #teamtomo @attychang.bsky.social
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Reposted by Danielle Grotjahn
Josh Dickerson @joshdcryoem.bsky.social · 08/12/2025
Now out in full form. Again, a big thanks to #teamtomo and @alisterburt.bsky.social for developing the infrastructure to build this on. journals.iucr.org/d/issues/202...
journals.iucr.org
Leopard-EM: an extensible 2D template-matching package to accelerate in situ structural biology
In situ cryo-EM coupled with 2D template matching (2DTM) holds the potential to visualize the cellular structureome in context, but further developments are required to make this a reality. We describ...
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Reposted by Danielle Grotjahn
Lars-Anders Carlson @lacarlson.bsky.social · 08/12/2025
We will announce a #postdoc opening in January. Cryo-ET and virus replication. If you're interested you can DM or email me already now. More info will follow!
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Danielle Grotjahn @nanigrotjahn.bsky.social · 07/12/2025
What an honor to see @attychang.bsky.social’s work featured in @jcb.org The Year in Cell Biology 2025 collection! Even more special that it coincides with my first #cellbio2025 conference 🙂 s/o to co-authors @baradlab.com @hamid13r.bsky.social @zidlab.bsky.social #teamtomo #cellbio25
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Danielle Grotjahn @nanigrotjahn.bsky.social · 17/11/2025
Prohibitins aren’t hanging out just anywhere in the membrane — they prefer the 💁‍♀️💎✨VIP section💅🪩🥂 Lab all-star @mmedina300kv.bsky.social maps these microdomains using cryo-ET + surface morphometrics. s/o to #teamtomo #cryoET co-authors @hamid13r.bsky.social @attychang.bsky.social @baradlab.com
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Nitish Dua @nitishdua.bsky.social · 28/10/2025
Exciting !
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Australian Society for Biochemistry and Molecular Biology - 2025 @asbmbaus.bsky.social · 01/10/2025
Thank you to all of our plenary speakers for sharing your incredible research with us at #ASBMB2025! @nanigrotjahn.bsky.social @ajknights7.bsky.social Michelle Haber and Randal Halfmann. We have loved having you all in Brisbane and hearing about your labs awesome work! 🦠🧬🧪🧫🔬
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Guenter Resch @nexperion.net · 23/09/2025
Happy to announce "Technical Innovations Using #SerialEM: A Community Meeting", a new format of hybrid meeting David Mastronarde and I are organizing in April 2026. For more info, a preliminary list of speakers, pre-registration etc. visit www.nexperion.net/semcm2026
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Dovile Januliene @djanuliene.bsky.social · 17/09/2025
What an inspiring few days at the #WEHeraeusSeminar! Great science, lively discussions, and lots of fun with the amazing community of #cryoEM, #StructuralBiology & #Microscopy. Huge thanks to everyone!
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Dovile Januliene @djanuliene.bsky.social · 16/09/2025
We all love colours, especially, when they can be generated automatically! Fantastic talk by Danielle Grotjahn @nanigrotjahn.bsky.social linking method development, structural biology and cell biology! #WEHeraeusSeminar #cryoEM #StructuralBiology #Microscopy @arnemoeller.bsky.social
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Danielle Grotjahn @nanigrotjahn.bsky.social · 12/09/2025
Excited to travel to Germany 🇩🇪 for the WE-Heraeus-Seminar: Cryo‐EM on the Move: New Applications and Challenges! ❄️🔬🧊 I look forward to hearing what everyone is cooking up to make cryoEM better 📈 faster 🏃‍♀️ stronger 💪 😎 www.we-heraeus-stiftung.de/veranstaltun...
we-heraeus-stiftung.de
Wilhelm und Else Heraeus-Stiftung: Main
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Danielle Grotjahn @nanigrotjahn.bsky.social · 20/08/2025
🚨 #teamtomo!🚨 Did you know there's a dedicated cryoEM/ET Mini-Symposium at the upcoming ASCB/EMBO meeting in Philly (Dec 6–10)??
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Danielle Grotjahn @nanigrotjahn.bsky.social · 29/07/2025
Ending the week on a high note in SLC with a visit to @uofubiochem.bsky.social after an inspiring M&M 2025 meeting!
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Danielle Grotjahn @nanigrotjahn.bsky.social · 11/07/2025
I have lots of opinions—but for your sake, I’ve limited them to segmentation in cryo-ET for this article 😉 www.sciencedirect.com/science/arti... #teamtomo
sciencedirect.com
Segmenting cryo-electron tomography data: Extracting models from cellular landscapes
Cryo-electron tomography provides an unprecedented view of cellular architecture, yet extracting meaningful biological insights remains challenging. S…
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Will Wan @williamnwan.bsky.social · 08/07/2025
Happy to say that my Current Opinion in Structural Biology article came out today. I hope it helps to guide to you in using cryo-ET to make new biological discoveries! www.sciencedirect.com/science/arti...
sciencedirect.com
A practical look at cryo-electron tomography image processing: Key considerations for new biological discoveries
Cryo-electron tomography (cryo-ET) enables 3D visualization of complex biological environments without the need for purification, thereby preserving t…
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Wiseman Lab @wisemanlab.bsky.social · 27/06/2025
New work from the lab (w/ @preronabora.bsky.social @mashiatzaman.bsky.social @mitomorph.bsky.social @nanigrotjahn.bsky.social) identifying a compound that activates OMA1-DELE1-HRI signaling to induce mitochondrial remodeling in MFN2-deficient cells. Check it out 👇 www.biorxiv.org/content/10.1...
biorxiv.org
Drug Repurposing Screen Identifies an HRI Activating Compound that Promotes Adaptive Mitochondrial Remodeling in MFN2-deficient Cells
Pathogenic variants in the mitochondrial outer membrane GTPase MFN2 cause the peripheral neuropathy Charcot-Marie-Tooth Type 2A (CMT2A). These mutations disrupt MFN2-dependent regulation of diverse as...
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Ardem Patapoutian @ardemp.bskyverified.social · 19/06/2025
I spoke with Jade Hindmon, host of @kpbssandiego.bsky.social Midday Edition, about the consequences of the current administration’s cuts to science funding. Please share to help spread the word and raise awareness. www.kpbs.org/podcasts/kpb...
kpbs.org
Nobel laureate on how Trump's cuts are hurting science
Neuroscientist, biologist and 2021 Nobel Prize winner Ardem Patapoutian joined Midday Edition to talk about how the Trump administration's effort to cut back on science spending is impacting researche...
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Nina Turner @ninaturner.bsky.social · 15/06/2025
As we approach the week leading up to Juneteenth, it’s important to recognize the flag and symbols around the day, as well as taking the opportunity to renew the call for lineage-based reparations for not only chattel slavery, but the harms inflicted upon Black Americans post-emancipation.
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Danielle Grotjahn @nanigrotjahn.bsky.social · 10/05/2025
It’s been a big week for the Grotjahn Lab—our very first graduate student, @mmedina300kv.bsky.social, successfully defended her PhD thesis! 🎉 So proud of everything she’s accomplished and grateful for the light she’s brought to our lab from day one ☀️⚡
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Danielle Grotjahn @nanigrotjahn.bsky.social · 09/05/2025
Tying self-worth to academic success, only to ask years later, "who am I, really?" Grateful @frezzalab.bsky.social took the time to capture this tension so beautifully in this article.
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Michaela Medina @mmedina300kv.bsky.social · 01/05/2025
So excited for this work to be out!! Thanks to @attychang.bsky.social, @hamid13r.bsky.social, blue sky less Daniel Fuentes, @nanigrotjahn.bsky.social and @tomo.science!!!
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Danielle Grotjahn @nanigrotjahn.bsky.social · 01/05/2025
🚨New preprint!🚨 #teamtomo We expanded Surface Morphometrics to quantify membrane thickness from cryo-ET—revealing local variation across organelles. Led by the lab’s first grad student, @mmedina300kv.bsky.social (defending Monday! 🍾) w/ @attychang.bsky.social @hamid13r.bsky.social & @tomo.science
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Atty (Ya-Ting) Chang @attychang.bsky.social · 10/04/2025
Feeling so honored and thrilled to see our work make it to the cover—what a milestone in my career! I can’t wait to receive the poster from JCB🤩
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