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Quentin Smith

@qmsmith.bsky.social
170 followers 215 following 36 posts

🧬⭕ | DNA Topology & DNA binding proteins! Postdoc: @bostonchildrens.bsky.social @harvardmed.bsky.social PhD: @mrc-lms.bsky.social @imperialcollegeldn.bsky.social

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Dr. Michael D. L. Johnson @copperbae.bsky.social · 19/08/2026
Happy to share the news that I have received the University of Arizona 2026 Graduate Teaching and Mentoring Award universityevents.arizona.edu/person/micha...
universityevents.arizona.edu
Michael D. L. Johnson
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Sergey Ovchinnikov @sokrypton.org · 15/08/2026
getting close to recreating Jane Richardson's style 😎
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Lindsay🧠 @neuromelody.bsky.social · 29/07/2026
Best news ever- I have finally earned my PhD in Neuroscience!!🧠 My thesis was completed in the lab of Dr. Gregory Corder @flybottleescape.bsky.social & is titled: “Opioidergic Organization of the Nociceptive Medial Thalamus & A Behavioral Model of Placebo Analgesia”
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Quentin Smith @qmsmith.bsky.social · 29/06/2026
My fellow colleague Alba (@svnddlsns.bsky.social) and I had the pleasure of hosting the 2026 GRS for Single Molecule Approaches to Biology in Switzerland 🇨🇭☀️!
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Oli Clarke @olibclarke.bsky.social · 04/07/2026
Pseudosymmetry in the wild 🙃🌻
Cluster of yellow Bird’s-foot trefoil flowers with almost six-fold symmetry.
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Anita Meier @anitafmeier.bsky.social · 03/07/2026
Our latest paper is out! 🎉 We show that the HSV-1 origin binding protein UL9 tethers dsDNA thereby forming intramolecular DNA loops and intermolecular DNA tethers. 🤝 www.nature.com/articles/s41...
nature.com
HSV-1 origin binding protein UL9 forms intermolecular DNA tethers and intramolecular DNA loops - Nature Communications
The mechanism of herpes simplex virus type 1 (HSV-1) genome replication remains not fully understood. Here, the authors find that the HSV-1 origin binding protein UL9 does not mediate DNA looping but ...
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Korak Ray @korakray.bsky.social · 18/06/2026
The first paper from my postdoc, looking at how tension activates DNA cleavage by the endonuclease ANKLE1, is out in @narjournal.bsky.social. ANKLE1 processes ultrafine bridges, persisting linkages between chromosomes that can lead to catastrophic DNA ruptures. (1/3) doi.org/10.1093/nar/...
Two panels showing ANKLE1 cleavage of DNA held between optically trapped beads. The left shows slow cleavage at low tension, and the right shows fast cleavage at high tension.
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Korak Ray @korakray.bsky.social · 30/06/2026
🚨 Preprint alert 🚨 Excited to share our latest bioRxiv preprint introducing DeepDiffusion, a tool for analysing facilitated 1D diffusion! 🔗 Preprint: www.biorxiv.org/content/10.6... (1/3)
biorxiv.org
DeepDiffusion: a Physics-Informed Neural Network for Heterogeneous Facilitated 1D Diffusion
Single-molecule fluorescence microscopy combined with optical tweezers has enabled the direct observation of diffusing proteins on tethered DNA. These and complementary techniques reveal facilitated o...
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Quentin Smith @qmsmith.bsky.social · 29/06/2026
My fellow colleague Alba (@svnddlsns.bsky.social) and I had the pleasure of hosting the 2026 GRS for Single Molecule Approaches to Biology in Switzerland 🇨🇭☀️!
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Pablo Alcón @palconh.bsky.social · 23/06/2026
Join us! Postdoc position (2-3 years) in our lab @molbiolau.bsky.social Looking for candidates with experience in cell culture, genome editing, biochemistry, and/or structural biology. Application opens in August via AU's system but informal enquiries by email are welcome from now. (1/2)
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Eugene Valkov @eugenevalkov.bsky.social · 23/06/2026
#cryoem folks- we keep seeing this popping up in 2d classes. Sample is a recombinant complex from insect cells
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Tobias Warnecke @tobiaswarnecke.bsky.social · 11/06/2026
Archaea the hornets of the microbial world. Discuss. www.biorxiv.org/content/10.6... TLDR: Archaeon kills bacterium with secreted phospholipase. Pretty nifty way to kill bacteria if you are a microbe with a very different lipid make-up, I reckon. No need to worry about accidentally killing yourself.
biorxiv.org
A Bactericidal Phospholipase from Archaea
Archaea kill bacteria, at least on occasion. The molecular underpinnings of these lethal interactions are barely understood. Here, we describe cinquedea, an α/β hydrolase secreted by the halophilic ar...
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Kelvin Lau @klausenhauser on 🙅‍♂️🐘🪡 @klausenhauser.bsky.social · 19/05/2026
Might enjoy using this tool and see if it’s the model building or innate to the dataset! CrystalBoltz soniaminseokim.github.io/crystalboltz...
soniaminseokim.github.io
CrystalBoltz: End-to-End Protein Structure Determination via Experiment-Guided Diffusion<br>for X-Ray Crystallography
Deformable Neural Radiance Fields creates free-viewpoint portraits (nerfies) from casually captured videos.
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Yasmin Hurd, PhD @neurovoice.bsky.social · 18/05/2026
Huge congratulations to @ashleyonthebrain.bsky.social on her successful thesis defense 🥳 It has been a joy to serve on her thesis committee alongside @dr-autumnivy.bsky.social. We are glad to have you in the community of Black women neuroscientists, Ashley! 🧠✨
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Yiliang Ding @yiliangding.bsky.social · 19/05/2026
Ding lab in 2026❤️Continue growing❤️ @johninnescentre.bsky.social
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Sholto David @sholtodavid.bsky.social · 17/05/2026
Surprised to discover that Thermo Fisher appears to show a fake western blot for the validation of one of their p53 antibodies. I've added a diagram to show the very similar bands. This does not appear to be one of the "published figures" but their own internal data.
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RCSB Protein Data Bank @rcsbpdb.bsky.social · 16/05/2026
Try this new online training game from Leandro F. Estrozi designed for newcomers in structural biology, with a focus on cryo-EM and cryo-ET map interpretation: rico.ibs.fr/helixplo...
Screenshot of online game
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Nucleic Acids Research @narjournal.bsky.social · 15/05/2026
Congratulations to Della Syau and the Farnung Lab @lucas.farnunglab.com on this outstanding work!
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Nucleic Acids Research @narjournal.bsky.social · 15/05/2026
⭐ #NARBreakthrough! ⭐ New #cryo-EM study reveals how #transcription factor IWS1 promotes #RNApolII #elongation. Its C-terminus contains #modularmotifs that bind elongation components, stabilizing the complex. IWS1 also competes with #RECQL5 for Pol II binding. 📖 Read here: doi.org/10.1093/nar/...
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Hanjin Liu @liu-hanjin.bsky.social · 09/05/2026
Job navigation in table view, searchable tags, 3D mesh optimized for masks, and many more features! 👉👉👉 github.com/hanjinliu/hi... Let's make our RELION directory a better place.
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Valérie Lamour @valeroche.bsky.social · 08/05/2026
Registration is opened for the FASEB conference DNA Topoisomerases in Biology and Medicine ! July 20th-23rd 2026, Nashville, TN Abstract Submission Deadline: Monday, May 25, 2026 Early Registration Deadline: Monday, June 8, 2026 #DNATopSRC John Nitiss, Valerie Lamour & Keir Neuman
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Giulia Palermo @giuliapalermo.bsky.social · 08/05/2026
Excited to co-organize the @keystonesymposia.bsky.social on Integrative Structural Biology with Alex De Marco @NewYorkStructuralBiology and Niccolò Banterle @embl.org! ⭐️Stellar speakers & keynote by @fraserlab.com! keystonesymposia.org/conferences/... RETWEET&APPLY #KSStructuralBio27 #CryoEM #AI
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Sebastian S. Cocioba @atinygreencell.bsky.social · 08/05/2026
55 stars on GitHub for SpliceCraft! Thank you all so much for the interest. Gonna make y'all proud.
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Lucas Farnung @lucas.farnunglab.com · 08/05/2026
The Farnung Lab is looking for postdoctoral researchers interested in understanding mechanisms at the intersection of chromatin, transcription, and replication. Find out more here: www.farnunglab.com
farnunglab.com
Contact — Farnung Lab
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Alister Burt @alisterburt.bsky.social · 04/05/2026
tl;dr: MissAlignment learns to score misalignment then wiggles your alignments around to reduce that misalignment -> no more misalignment = high res STA 🌟 Watching @martenchaillet.bsky.social chip away at this was a real privilege! I’m excited to see this out and what you all will do with it 🙃
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MRC Laboratory of Molecular Biology @mrclmb.ac.uk · 29/04/2026
Congratulations to @lapassmore.bsky.social, Joint Head of the LMB’s Structural Studies Division, who has been elected an international member of @nationalacademies.org Congratulations to #LMBalumni Andrea Brand who has also been elected. Read more: mrclmb.ac.uk/news-events/... #LMBNews
Lori passmore
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MRC Laboratory of Molecular Biology @mrclmb.ac.uk · 29/04/2026
Re-entering the research field after a long break can be difficult. That’s why the LMB has introduced the Career Returner Fellowship: a 3-year, fully-funded postdoc placement to rebuild career momentum and reignite scientific ambitions. Applications open until 17th May. mrclmb.ac.uk/careers-and-...
Three-year funded postdoctoral fellowship for scientists returning after a 12-month career break, deadline May 17, 2026.
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Karolin Luger @nucleosomepolice.bsky.social · 28/04/2026
New work from Sashi Weerawarana on how TFAM compacts mitochondrial DNA 🧬 TFAM oligomerizes on DNA to form compact, homogeneous higher-order complexes (see beautiful mass photometry data below), that still retain dynamic behavior. Congratulations Sashi and Wei. www.biorxiv.org/content/10.6...
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MRC Laboratory of Molecular Biology @mrclmb.ac.uk · 27/04/2026
🚨 Applications are open for our Rising Talent Fellowship! Thinking of applying but have questions? Join our webinar today at 1pm to find out more. Hear from LMB Group Leaders and current Fellows. 👉 Register here: ow.ly/JggH50YQr3x
Promotional banner for Rising Talent Fellowship offering a three-year postdoctoral training for Black heritage scientists with a May 2026 deadline.
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Aga Gambus @agagambus.bsky.social · 24/04/2026
Congratulations to Dr Tianyi Zhang and Dr Layara Abiko@layaraabiko.bsky.social, who are recipients of Career Development Awards from Wellcome Trust. www.birmingham.ac.uk/news/2026/su...
birmingham.ac.uk
Success for Birmingham researchers in Wellcome Career Development Awards - University of Birmingham
Researchers at the University of Birmingham have been successful in the most recent round of the Wellcome Career Development Awards.
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MRC Laboratory of Molecular Biology @mrclmb.ac.uk · 22/04/2026
A massive congratulations to @nicfarmer.bsky.social, Race Equality Lead at the LMB, who has achieved their CMI Level 6 Diploma in Professional Management and Leadership Practice, with a focus on leading EDI in an organisational context 👏 Read more: mrclmb.ac.uk/news-events/... #LMBNews
Nic Farmer
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Kelvin Lau @klausenhauser on 🙅‍♂️🐘🪡 @klausenhauser.bsky.social · 22/04/2026
Calling all xray structure folks that have worked with denovo proteins. Do you suffer from high rfactors? Myself, someone else I know and now multiple structures all seem to suffer from this. Assuming we all tried our best in model building, what could be some causes?
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MadScientist @mads100tist.bsky.social · 22/04/2026
Intrusive thought: Start another project
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Sonja Schmid @scisonja.bsky.social · 20/04/2026
PhD's & postdocs: dont miss the GRS partner conference, organized by @qmsmith.bsky.social & #AlbaGómez-Segalàs with lots of interaction opportunities and career mentorship: ⏰ June 27-28, 2026 🌍 Swiss Alpes (✈️ Geneva) ✅ APPLY now: deadline May 30. www.grc.org/single-molec...
grc.org
2026 Single Molecule Approaches to Biology (GRS) Seminar GRC
The 2026 Gordon Research Seminar on Single Molecule Approaches to Biology (GRS) will be held in Les Diablerets, Vaud (fr) Switzerland. Apply today to reserve your spot.
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Sonja Schmid @scisonja.bsky.social · 20/04/2026
Don't miss the #GordonConference on 𝑺𝒊𝒏𝒈𝒍𝒆-𝒎𝒐𝒍𝒆𝒄𝒖𝒍𝒆 𝑨𝒑𝒑𝒓𝒐𝒂𝒄𝒉𝒆𝒔 𝒕𝒐 𝑩𝒊𝒐𝒍𝒐𝒈𝒚, organized by #KevinWelsher & me: ⏰ June 28 - July 3, 2026 🌍 in the Swiss Alpes (✈️ Geneva) ✅ APPLY now: deadline May 31. We're 75% booked: register today & be there! 🙌 🕳️ 🧬🧪🧫 🔬🟩🟥🟩🟥🏋️‍♀️💥🪤 🍩 ... you get it... 😁
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Oli Clarke @olibclarke.bsky.social · 18/04/2026
Has anyone had any luck using CDART from NCBI lately? It used to work really well for exploring domain architectures, but now seems broken... I guess InterPro is the closest replacement? www.ncbi.nlm.nih.gov/Structure/le...
ncbi.nlm.nih.gov
CDART: New Query
Search for Similar Architectures
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LUMICKS @lumicks.bsky.social · 14/04/2026
A new #Nature study from the Rueda and @alicepyne.bsky.social labs identifies the molecular mechanism of DNA supercoiling in CRISPR–Cas9 off-target activity. www.nature.com/articles/s41...
nature.com
Structural basis of supercoiling-induced CRISPR–Cas9 off-target activity - Nature
Cas9 structures explain&nbsp;topology sensing and off-target activation.
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Florent Waltz @florentwaltz.bsky.social · 06/04/2026
Spent too much time in situ and forgot the level of detail you get with SPA 🍩 #cryoEM
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Ira Blader @bladerlab.bsky.social · 01/04/2026
PIs/group leaders, what was the most important aspect of the first paper your lab published 1️⃣ Establishing the lab's identity 2️⃣ Communicating an important discovery 3️⃣ Completing a project started as a postdoc 4️⃣ Other 📊 Show results
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Eddie Rollins @eddierollins.bsky.social · 30/03/2026
Some of my PhD work is now out in Nature! www.nature.com/articles/s41... Investigating the structural basis of off‑target Cas9 binding to supercoiled DNA with #AFM & cryo-EM. From my time in the lab of @alicepyne.bsky.social, in collaboration with @qmsmith.bsky.social and the team at the MRC LMS.
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Nature @nature.com · 30/03/2026
Nature research paper: Structural basis of supercoiling-induced CRISPR–Cas9 off-target activity go.nature.com/4t39bk8
go.nature.com
Structural basis of supercoiling-induced CRISPR–Cas9 off-target activity - Nature
Cas9 structures explain topology sensing and off-target activation.
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Oli Clarke @olibclarke.bsky.social · 27/03/2026
Extended this (map_salami) a bit - added a movie option which will generate a labeled movie (1080p or 4k) transitioning between all scenes, with a short rocking motion at each scene for depth perception:
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Oli Clarke @olibclarke.bsky.social · 27/03/2026
Added a little script to chimerax-trimmings to automate the creation of panels for model-map fit figures. It zones the map around (by default) 40aa parts of each chain (but doesn't cut in the middle of helices). Saves each as a png, metadata to csv. Saves each view as a scene for tweaking views.
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Kelly Nguyen @kellythd-nguyen.bsky.social · 26/03/2026
Proud to share the yeast telomerase structure, led by the talented @hongmiaohu.bsky.social in collaboration with the Wellinger and Chartrand labs. Discovered 37 years ago and took us nearly 7 years but totally worth the wait 😍. www.science.org/doi/10.1126/... www.youtube.com/watch?v=gFE4...
youtube.com
Cryo-EM structure of yeast telomerase
YouTube video by MRC Laboratory of Molecular Biology
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Department of Infectious Disease @imperialinfect.bsky.social · 26/03/2026
Research from Imperial, @mrc-lms.bsky.social, & @sheffielduni.bsky.social reveals that the twisting of DNA could play a role in correcting CRISPR errors. 🧬 The team captured interactions between CRISPR and DNA, providing insights that could help eradicate errors. www.imperial.ac.uk/news/article...
imperial.ac.uk
DNA shape explains crucial gene-therapy challenges
Researchers at Imperial College London, the MRC Laboratory of Medical Sciences (LMS), and the University of Sheffield have shown that the physical tw...
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Waggoner Lab @labwaggoner.bsky.social · 26/03/2026
Structural basis of supercoiling-induced CRISPR–Cas9 off-target activity @nature.com @qmsmith.bsky.social @alicepyne.bsky.social @imperialmed.bsky.social www.nature.com/articles/s41...
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Alice Pyne @alicepyne.bsky.social · 25/03/2026
Supercoiling not only brings DNA to life (and makes it dance) but also changes how key proteins such as #CRISPR interact with it. Thanks @qmsmith.bsky.social for the brilliant collaboration, Sylvia for developing an amazing new #imageanalysis pipeline & @eddierollins.bsky.social for beautiful #AFM.
CryoEM and AFM images of DNA minicircles bound to CRISPR Cas9
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Quentin Smith @qmsmith.bsky.social · 25/03/2026
Excited to share our story published today @nature.com! 🔗 www.nature.com/articles/s41... Read about how we uncover the molecular mechanisms that enable Cas9 to bind and cleave negatively supercoiled ((-)SC) off-targets! Have a quick read of some of the key events in the thread below🧵:
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Quentin Smith @qmsmith.bsky.social · 25/03/2026
1/11 In our story out today in @nature.com , we showcase the molecular mechanisms that enable Cas9 to bind and cleave negatively supercoiled ((-)SC) off-targets! 🧬🧵 🔗 www.nature.com/articles/s41... #CRISPR #Cas9 #DNATopology #AFM #CryoEM #SingleMolecule #Biophysics
nature.com
Structural basis of supercoiling-induced CRISPR–Cas9 off-target activity - Nature
Cas9 structures explain&nbsp;topology sensing and off-target activation.
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MRC Laboratory of Medical Sciences @mrc-lms.bsky.social · 25/03/2026
New research in Nature shows that the physical twisting of DNA plays an important role in DNA editing mistakes made by CRISPR. Using nanometer-sized circles of DNA, scientists captured never-before-seen interactions between CRISPR & DNA, providing insights that could eradicate errors altogether.
lms.mrc.ac.uk
DNA shape explains crucial gene-therapy challenges
CRISPR is a powerful DNA-editing tool that has underpinned huge advancements in human healthcare in the last decade. It is a precision tool, but is not perfect, and misplaced DNA edits can compromise ...
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