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For decades, how methanogenic archaea activate the MCR complex to produce methane remained a mystery. Today in Nature, we report the high-resolution cryo-EM structure of the MCR activation complex! www.nature.com/articles/s41...
Anuj
@rnfr2d2.bsky.social
CryoEM | Anaerobic structural biology | Bioenergetics | CO2 fixation and energy conservation SYNMIKRO Marburg
125 followers145 following32 posts
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For decades, how methanogenic archaea activate the MCR complex to produce methane remained a mystery. Today in Nature, we report the high-resolution cryo-EM structure of the MCR activation complex! www.nature.com/articles/s41...
We wrote a short Spotlight article in @cp-trendsmicrobiol.bsky.social to highlight the wonderful work from @rhyswg.bsky.social and @ashleighkropp.bsky.social www.cell.com/trends/micro...
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
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Congratulations to the winners of best PhD talk @ #MAdLand2026 from right to left: @caeciliafkunz.bsky.social from @jandevries.bsky.social lab, who won @theplantjournal.bsky.social award 🌱 @thanahartmann.bsky.social from Schuller lab and @hannahlepper.bsky.social from @franzificht.bsky.social lab
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So happy to see this paper finally out 🥳 it took only seven years after the first purification of archaeal peptidoglycan 🤣 Congrats to all the people involved 🥂🍾 And here is the story behind the paper: communities.springernature.com/posts/cracki...
Interested in #archaea, #methane, #cell-envelopes? New paper out @nature.com ! We discovered an enzyme that specifically cleaves the cell wall of methanogens, revealing a new chemical structure of archaeal peptidoglycan, 50 yrs after its first description www.nature.com/articles/s41... #MicroSky 🧵👇
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A sad day. Ada's pioneering work on the ribosome changed how we understand one of the central machines of life. She is a remarkable example of curiosity and boldness in pursuing questions that seemed impossible. Her scientific courage and persistence has been an inspiration.
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Powering methanogenesis from fatty acids by a twin-heme-mediated reverse redox-loop https://www.biorxiv.org/content/10.64898/2026.08.18.745454v1
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One month left to apply!! 🧪 @biozentrum.unibas.ch seeks a group👩🔬 exploring molecular questions relevant to climate 🌍, including biogeochemical cycles (e.g., carbon, nitrogen) ♻️, bioenergetic energy conversion (e.g., photosynthesis, chemosynthesis) ☀️⚗️, and the adaptation to environmental change 🌊🌡️🦠🌾
Super excited to launch this search for a new endowed professor at the @biozentrum.unibas.ch! Join us to build a research cluster in Climate Biophysics! 🌍🌊🌾🔬🧪 This is a unique opportunity to create a community in Basel🇨🇭working together on this timely topic! ⏳🌡️ Questions? Please reach out! 👩🔬👨🔬
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PLEASE SHARE! New job openings in my lab @zmbp-tuebingen.bsky.social. We have a broad interest into the mechanistic basis of how molecular complexes are rewired during cellular development in plants and during invasion by pathogens. 🌱🍄🔬 See details below 👇 #PlantSciJobs
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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! 🙏
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 🧵
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Who's interested in time-resolved serial crystallography on [FeFe]-hydrogenase?? Check out Moritz' new preprint: www.biorxiv.org/content/10.6...
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Nature research paper: Architecture of the 8 MDa Hdr–Vhu–Fwd super-assembly in class I methanogens go.nature.com/4h34dRD
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Awesome work to determine the structure of a freakin 8MDa enzyme complex with over 600 FeS clusters! Sophia won the poster prize at the recent GRC C1 👏 www.nature.com/articles/s41...
Huge discovery from Marburg: Prof. Schuller (@synmikro.bsky.social),doctoral stud. @sophia-pa.bsky.social+colleagues have resolved1️⃣of the🧬🔬largest enzymes. Published in Nature, the study shows how methanogenic archaea generate energy under extreme conditions, offering🆕insights into the🌎carbon cycle.
Mother of all electron-bifurcating complexes is here! Congratulations to Sophia @sophia-pa.bsky.social for discovering and determining the structure of this mega assembly! You put in so much effort to get this paper published. I am so happy and proud of you and your achievement!
Excited to share my paper! 🥳 Today in #Nature we reveal an 8 MDa Hdr electron bifurcating super-assembly in class I methanogens that couples the first and last steps of hydrogenotrophic methanogenesis. A lineage-specific adaptation to anaerobic niches. www.nature.com/articles/s41...
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1/ Happy to share our preprint! The Mtr complex catalyses the second-to-last step of the methanogenesis and is an essential bioenergetic machine in most methanogenic archaea. Anaerobic cryo-EM of Mtr reveals a nitrogenase-like metallocluster bound at its active site! www.biorxiv.org/content/10.6...
Check out this latest work from @gyanaprakash.bsky.social on the structure of an electron bifurcating/confurcating hydrogenase from cyanobacteria!
Excited to share our new preprint! How does the cyanobacterial hydrogenase HoxEFUYH drive photosynthetic H₂ production? Using #cryoEM, biochemistry, FTIR and EPR spectroscopy, we reveal its molecular mechanism, including the basis of electron bifurcation/confurcation. www.biorxiv.org/content/10.6...
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1/7 New preprint: we found that Chlamydomonas carries a giant and unexpectedly elaborate chloroplast RNA polymerase with 12 previously unknown subunits, overturning the idea that the complexity of this organellar enzyme emerged during plant terrestrialization! www.biorxiv.org/content/10.6...
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I’m extremely grateful for the ERC Advanced Grant – with the awarded 2.5 Mio EUR, we will tackle how electrodynamics effects control the energy currents of life. 🎉 🎉 🎉 www.su.se/english/news...
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Excited to share our new preprint! 🧬❄️ by brilliant @mdreimann.bsky.social and great collaborators! Using cryo-ET&EM, we reveal archaeal chromatin in a near-native state: variable-beads-on-a-string fibers shaped by growth phase and histone composition #ArchaeaSky www.biorxiv.org/content/10.6...
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Very happy to share my first preprint from my PhD 🎉 doi.org/10.64898/202... We develop an αHL-based framework to engineer and quantify selective diffusion across synthetic membranes using controlled nanopore chemistry. 1/7
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Cool to see our recent paper among the "Editors' Highlights" in @natcomms.nature.com that "aim to showcase the 50 best papers recently published" 🥰 www.nature.com/collections/...
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Check out our latest paper – today out in JACS - on proton gates in the antiporter modules of Complex I! So proud of my amazing lab – Sofia Badolato, Sarah Rossmann & Hyunho Kim – and thank you @kawresearch.bsky.social for long-term support of our work. pubs.acs.org/doi/10.1021/...
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Endlich wieder Massephase! 🙏🏻 Hier der Presseartikel für unsere neue Publikation: www.uni-potsdam.de/de/nachricht... @unipotsdam.bsky.social @unimarburg.bsky.social @schullerjm.bsky.social @natcomms.nature.com
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Now online with @natcomms.nature.com 🤩 doi.org/10.1038/s414...
Carbonic anhydrase catalyses the interconversion of CO2 and HCO3- and helps increasing the net-CO2 concentration inside cells. Why? CO2-reducing enzymes like RuBisCO are notoriously slow and ineffective. However, import of HCO3- is typically coupled to ATP consumption...
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We just received funding for a 2yr postdoc position on cryoEM of fungal gpcrs. Official call will open soon. Contact me if you‘re interested!
Der Biologe Dr. Florian Altegoer vom Institut für Mikrobiologie der Heinrich-Heine-Universität Düsseldorf (HHU) erhält einen mit 210.000 Euro dotierten „Exploration Grant“ der Boehringer Ingelheim Stiftung (BIS).
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Across scales from cells🦠 to atoms⚛️ – We reveal how anaerobic #bacteria break down very stable aromatic compounds found e.g. in oil spills 🛢️ #Bioremediation #TeamTomo 🧪 🧶🧬 🔬 Awesome collab with Lena, Matthias, @schullerjm.bsky.social @rnfr2d2.bsky.social @tomaspascoa.bsky.social @tamb-o.bsky.social
1/ Excited to share our preprint! 🥳 Degradation of aromatic compounds, including BTEX pollutants, requires highly endergonic aromatic ring reduction. Using #cryoEM and in situ #cryoET, we show how BCRII couples electron bifurcation modules in one giant redox machine www.biorxiv.org/content/10.6...
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Thanks for the fun collaboration into this fascinating “oil eating” biomachine. I learned a lot! 🧪 #TeamTomo
How do “LEGO-like” electron-bifurcating modules combine to drive degradation in BTEX-contaminated ecosystems? Check out our latest preprint, where we use cryo-EM and cryo-ET to reveal how the 1 MDa BCRII complex powers extremely endergonic aromatic ring reduction. www.biorxiv.org/content/10.6...
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1/ Excited to share our preprint! 🥳 Degradation of aromatic compounds, including BTEX pollutants, requires highly endergonic aromatic ring reduction. Using #cryoEM and in situ #cryoET, we show how BCRII couples electron bifurcation modules in one giant redox machine www.biorxiv.org/content/10.6...
How do “LEGO-like” electron-bifurcating modules combine to drive degradation in BTEX-contaminated ecosystems? Check out our latest preprint, where we use cryo-EM and cryo-ET to reveal how the 1 MDa BCRII complex powers extremely endergonic aromatic ring reduction. www.biorxiv.org/content/10.6...
This was a true team effort! Very proud of this work! Huge shoutout to my fellow co–first authors Lena Appel, Tomas @tomaspascoa.bsky.social, Davide @tamb-o.bsky.social Grateful to Ben @cellarchlab.com, Jan @schullerjm.bsky.social, and Matthias for leading and shaping the project throughout!
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New preprint alert 🚨: Who actually drives methane production in anoxic sediments 🧬🔥? We point to a transcriptionally dominant 🦠 clade: VadinHA17. shorturl.at/Rijc0 @bledinadede.bsky.social @taylorpriest.bsky.social
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Breathing both ways: simultaneous aerobic–anaerobic respiration in microbes
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65 years after Peter Mitchell’s chemiosmotic theory, we report an association between ATP synthase and the electron transport chain. In the preprint led by @longzhou88.bsky.social, we describe a large supercomplex and show how the supramolecular organization contribute to oxidative phosphorylation 🧵
Check out the latest work on PSI:Cytc6 complex from Chlamy! many congratulations @gyanaprakash.bsky.social and @schullerjm.bsky.social #cryoem
Excited to share our new paper in @natcomms.nature.com ! Here, we present the cryo-EM structure of the Cytc₆:PSI complex from Chlamydomonas reinhardtii👇 www.nature.com/articles/s41...
I am truly honoured and delighted to receive the GBM #PhDAward from @gbmev.bsky.social Grateful to @schullerjm.bsky.social and Prof. Volker Müller for their continuous support and guidance! www.uni-marburg.de/en/prfolder-...
The GBM #PhDAward was presented to Anuj Kumar for his PhD thesis on the „Structural basis of CO2 fixation and energy conservation in acetogens“ Congratulations, Anuj! #MK2026 @unimarburg.bsky.social
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This is a proud and exciting moment for me. Manon continues to redefine our understanding of pyrenoid biology, as she pushes the frontiers of #TeamTomo straight into the natural world around us 🌍🌊🌾🔬 Her new group at @gmivienna.bsky.social will explore fresh and impactful questions. Check it out! 🧪👩🔬
Excited to announce I’m starting a new lab at @gmivienna.bsky.social (Vienna BioCentre) in Sept 2026 We study how carbon fixation is inherited and maintained in algae using cryo-ET, imaging, environmental sampling&more Looking for people who want to build the lab together, get in touch! #teamtomo
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Stunning video installation by Isabell Bullerschen featuring our T. kivui #CryoET data 🧡 On view until April 19th at the HEK in #Basel! hek.ch/en/program/e...
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A childhood dream has come true – I was appointed Full Professor for Sustainable Biotechnology at the University of Düsseldorf @hhu.de : tinyurl.com/f43s74hp and as Director of the Institute for Molecular Enzyme Technology (IMET, www.iet.uni-duesseldorf.de/en/) at FZ Jülich @fz-juelich.de .
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Happy to share our new paper on proton transfer in metalloenzymes, out now in @pccp.rsc.org! Exploiting crystallography, electrochemistry, FTIR spectroscopy, and QM calculations we identified a Zundel ion in the catalytic proton tranfer pathway of [FeFe]-hydrogenase. doi.org/10.1039/D5CP...
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New preprint by @alok-bharadwaj.bsky.social explaining the workings of SURFER, a simple tool to segment membrane, micelle or nanodisc densities in cryoEM maps. Try it via the @chimerax.ucsf.edu ToolShed: cxtoolshed.rbvi.ucsf.edu/apps/chimera... Despite LocScale in the name, it works on any map.
Interactive segmentation of membrane and membrane mimic densities in cryo-EM maps www.biorxiv.org/content/10.64898/2026.02.25.707988v1 #cryoEM
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At long last, the Chlamy chloroplast ribosome hat 🎩 (now renamed the arm 💪) is here to say hello👋! We first spotted this extended structure in green algae a decade ago, and @florentwaltz.bsky.social did beautiful work bringing it into focus! #CryoEM ❄️ #TeamTomo 🔬 #PlantScience 🌾 #ProtistsOnSky 🧪
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 🧵
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This is what I call a booster 🚀: Milton and colleagues use a novel, bipyridium-type redox mediator to increase the electrochemical H2 evolution activity of [FeFe]-hydrogenase by a factor of 10 compared to previous protocols. pubs.acs.org/doi/full/10....
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Replying to @drellisdon.bsky.social
An incredibly challenging single particle cryo-EM structure. Capturing both the N and C termini was difficult enough, but the project required a major effort to resolve the full length protein structure to capture the overall architecture of the KICSTOR-GATOR1 complex. Well worth it in the end!
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I am very excited to share our new preprint - "A Zundel Ion in the Catalytic Proton Transfer Pathway of [FeFe]-Hydrogenase" - for which we revisited an older theory of ours, and came to surprising conclusions... 🧵 doi.org/10.26434/che...
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Excited to share our latest @nature.com: How does naloxone (Narcan) stop an opioid overdose? We determined the first GDP-bound μ-opioid receptor–G protein structures and found naloxone traps a novel "latent” state, preventing GDP release and G protein activation.💊🧪 🧵👇 www.nature.com/articles/s41...
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Our latest work on the nitrogenase-like methylthio-alkane reductase, which specifically reduces reduces carbon-sulfide bonds is now out @natcatal.nature.com: doi.org/10.1038/s419.... We find for the first time large #nitrogenase metalloclusters (P- and L-cluster) outside nitrogenases.
Microbial enzymes hold the key to greener plastics! Rhodospirillum rubrum can produce ethylene without releasing CO₂. A team @rebeleinlab.bsky.social purified the enzyme and solved its structure, an important step towards #SustainableChemistry.
Great work from the lab of @rebeleinlab.bsky.social ! Now out in @natcatal.nature.com
Microbial enzymes hold the key to greener plastics! Rhodospirillum rubrum can produce ethylene without releasing CO₂. A team @rebeleinlab.bsky.social purified the enzyme and solved its structure, an important step towards #SustainableChemistry.