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Fletcher Lab

@fletcherlab.bsky.social
241 followers 350 following 34 posts

We investigate interesting E3 mechanisms at the frontline between virus and cell, with some virology thrown in for good measure. Ub-er fun! At the MRC-University of Glasgow Centre for Virus Research. thefletcherlab.co.uk

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Reposted by Fletcher Lab
Kranzusch Lab @kranzuschlab.bsky.social · 12/06/2026
How do human cells defend against viruses? @sgfern.bsky.social discovers that human immune proteins named ISGs target ancient features of replication shared between animal and bacterial viruses – opening analysis of human immunity to the power of bacterial genetics www.biorxiv.org/content/10.6...
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Reposted by Fletcher Lab
The EMBO Journal @embojournal.org · 11/06/2026
Alternative splicing broadens antiviral diversity at the human OAS2 locus Emma Davies et al @fletcherlab.bsky.social link.springer.com/article/10.1...
link.springer.com
Alternative splicing broadens antiviral diversity at the human OAS2 locus - The EMBO Journal
Interferons (IFN) are cytokines that regulate the expression of hundreds of genes during viral infections to generate a broadly antiviral environment in the stimulated cell. Antiviral breadth is provi...
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Fletcher Lab @fletcherlab.bsky.social · 03/06/2026
Delighted to share our article on the functional expansion of OAS2 via alt. splicing. link.springer.com/article/10.1... A tour de force from PhD student Emma Davies and friends.
link.springer.com
Alternative splicing broadens antiviral diversity at the human OAS2 locus - The EMBO Journal
Interferons (IFN) are cytokines that regulate the expression of hundreds of genes during viral infections to generate a broadly antiviral environment in the stimulated cell. Antiviral breadth is provi...
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Reposted by Fletcher Lab
Jolly Lab @jollylab.bsky.social · 06/05/2026
We are incredibly excited to see our most recent story out @nature.com today:HIV triggers CD4-signaling to remodel nuclear pores and license infection!A heroic effort led by our very own @d-mesner.bsky.social & @mattvxwhelan.bsky.social! @blizardinstitute.bsky.social Link: tinyurl.com/HIVNup 1/11
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Aude Bernheim @audeber.bsky.social · 02/04/2026
How diverse is bacterial immunity ? We report in @science.org how language models allowed us to predict 2.4M antiphage proteins spanning >23K novel potential systems. 👏 @emordret.bsky.social, @alexhv.bsky.social & al doi.org/10.1126/scie... Explore them here defensefinder.mdmlab.fr/wiki/refseq_...
science.org
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Yogesh Kulathu @kulathu.bsky.social · 27/03/2026
Registration now open! 2026 #EMBO #Ubiquitin Workshop set in stunning Monopoli, Puglia 🇮🇹 Cutting edge science, great speakers, short talk opportunities, travel awards Limited spaces. Dont miss out - register early! Registration & more info: meetings.embo.org/event/26-ubi...
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Reposted by Fletcher Lab
Elif Karagöz @gekaragoz.bsky.social · 25/03/2026
Our work on the role of Ufmylation on ribosome quality control on the ER is out! Great work of two terrific first authors Milica and @alessandrick.bsky.social together with our wonderful collaborators, the one and only Dagdas lab @plantophagy.bsky.social!
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Ben Hale @benhale.bsky.social · 25/03/2026
🔬 We’re hiring in Zürich🇨🇭! My lab is recruiting a new PhD student in molecular immunology (interferons, autoantibodies & viral disease). Position is fully-funded. Starting date anticipated to be late 2026/early 2027. Further details and how to apply: tinyurl.com/IMVPhD2026 Deadline 1st May 2026.
tinyurl.com
PhD Studentship in Molecular Immunology (interferons in health and disease)
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Fletcher Lab @fletcherlab.bsky.social · 24/03/2026
Receptor clustering is a common theme in viral detection, but whether detection directly hinders genome replication is less clear. Excited to share the Z in RZ-type E3s: ZNFX1 is an RNA helicase that builds ubiquitin chains leading to aggregates that ensnare viral RNA. www.cell.com/molecular-ce...
cell.com
ZNFX1 uses two-component ubiquitin circuitry to quarantine viral RNA
Squair et al. show that ZNFX1 restricts ssRNA virus replication by integrating SF1 helicase activity with dual E3 ligase mechanisms. ATP-dependent RNA binding activates E3 function, driving self-propa...
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Reposted by Fletcher Lab
Alper Akay @alperakay.bsky.social · 06/03/2026
PhD position in our lab - 4-year funded by BBSRC and @nrpdtp.bsky.social in collaboration with @earlhaminst.bsky.social and Inspiralis Ltd. Open to UK fee qualifying students - UK citizens and citizens of Ireland (residency requirement), etc biodtp.norwichresearchpark.ac.uk/projects/how...
biodtp.norwichresearchpark.ac.uk
How do RNA molecules shape genome regulation in the nervous system? (AKAY_U26CASE) | Doctoral Training Partnership
This is open to Home Fee Status candidates only. This PhD project will investigate how RNA modifications influence the activity of topoisomerase I (TOP1), a crucial enzyme that regulates DNA…
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Sam Hobbs @hobbslabutah.bsky.social · 06/03/2026
CBASS is a cyclic nucleotide-based antiviral system in bacteria that is related to cGAS-STING signaling in animals. One of the big questions is how CBASS is activated during phage infection? We made some progress on this during my final year in the Kranzusch lab. www.biorxiv.org/content/10.6...
biorxiv.org
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Leo Kiss @leokiss.bsky.social · 05/03/2026
I am incredibly excited to share that I will start my independent lab at the @unidue-zmb.bsky.social at the @unidue.bsky.social as Junior Professor of Cellular Biochemistry. Research in my lab has the goal to decipher the ubiquitin code! There are multiple open positions! (1/3)
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Martin Rennie @martinrennie.bsky.social · 27/02/2026
Excited to share our new paper uncovering how FANCD2 recognises various DNA repair proteins www.biorxiv.org/content/10.6... @hw1o9.bsky.social
biorxiv.org
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Rune Busk Damgaard @rbdamgaard.bsky.social · 16/02/2026
🧐 What if metabolic defects are not just a consequence of inflammatory disease - but actively contribute to it? Inflammation and metabolism are deeply intertwined, but the molecular links remain unclear. Our new paper in Cell Death & Differentiation uncovers one. 🧵👇 nature.com/articles/s41...
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Yasin Dagdas @plantophagy.bsky.social · 23/02/2026
Really happy to see this one out: www.sciencedirect.com/science/arti... Alibek's drive & great coll w/ friends @gekaragoz.bsky.social & E. Hallacli resulted in a cool story that starts with our beloved #Marchantia and ends with iPSC-derived neurons 🤩🤪 A short 🧵
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Adrian Saurin @adesaurin.bsky.social · 22/02/2026
I have multiple positions available to join my lab from this summer: #postdoc, #student and #technician. Adverts to follow but see www.saurinlab.com for further details. #senescence, #mitosis, #cellcycle, #phosphorylation are the key areas. Email me if interested.
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David Bhella @dbhella.bsky.social · 14/02/2026
I am excited to share our latest preprint - An evolutionarily divergent herpesvirus with a giant tail. Featuring symmetry breaking and genome annotation from structure using ModelAngelo. doi.org/10.64898/202...
Image of a herpesvirus structure
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Sam Hobbs @hobbslabutah.bsky.social · 22/01/2026
Hello world! I am excited to announce my lab is open at the University of Utah in the Department of Biochemistry. We are looking for scientists at all levels interested in studying host-virus interactions in both bacteria and animals. Come join us in beautiful Utah! (photo is 10 steps from lab)
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Fletcher Lab @fletcherlab.bsky.social · 22/01/2026
Super new paper from @ubch-alice.bsky.social and Danny Huang @cruk-si.bsky.social – a great deal of hard work and development behind this story. From a technical perspective, this reads as a primer for tapping 'unconventional' E3s. Very well done Alice and team!
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Reposted by Fletcher Lab
Elliott Lab @elliottlab.bsky.social · 09/12/2025
Excited to share our work into ubiquitin E1-E2 specificity mechanisms. CryoEM visualising #ubiquitin transfer,biochemistry,evolution @labhofmann.bsky.social & tissue expression analyses @psarkies.bsky.social Big thanks to the team,reviewers & handling editor @dimitristypas.bsky.social rdcu.be/eTRdR
rdcu.be
UBA6 specificity for ubiquitin E2 conjugating enzymes reveals a priority mechanism of BIRC6
Nature Structural & Molecular Biology - Riechmann et al. uncover structural features governing ubiquitin transfer from ubiquitin-activating E1 enzymes UBA1 and UBA6 to specific E2...
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Fletcher Lab @fletcherlab.bsky.social · 01/12/2025
We’re thrilled to onboard Alice Wicks @ubch-alice.bsky.social in the lab this week. Alice trained with Danny Huang @cruk-si.bsky.social and has developed exciting new ideas for co-opting E3s for targeted degradation. Welcome to the team, Alice.
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Peter Mabbitt @petermabbitt.bsky.social · 29/11/2025
We’ve made some new tools to manipulate N-recognins. Check them out in our preprint. www.biorxiv.org/content/10.1...
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Fletcher Lab @fletcherlab.bsky.social · 24/11/2025
Join @uofglasgow.bsky.social for a funded 3.5 year PhD programme: www.gla.ac.uk/colleges/mvl... Also up for grabs is a project on antiviral PROTACs, supervised by us and the France lab (School of Chemistry) should ubiquitin and viruses appeal! Please get in touch with any questions.
gla.ac.uk
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Jonathan Pruneda @jnpruneda.bsky.social · 30/10/2025
Excited to share the peer-reviewed version of our work, now online in @embojournal.org! Big thanks to our reviewers and @hvodermaier.bsky.social for facilitating this process. Looking forward to continuing this fun collaboration with @michaelnadbio.bsky.social! www.embopress.org/doi/full/10....
embopress.org
RNF114 and RNF166 exemplify reader-writer E3 ligases that extend K11 polyubiquitin onto sites of MARUbylation | The EMBO Journal
imageimageMARUbylation (mono-ADP-ribose ubiquitylation) is a multilayered post-translational modification controlled by PARPs and Deltex E3 ligases. This study identifies RNF114 and RNF166 as reader-w...
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Rune Busk Damgaard @rbdamgaard.bsky.social · 30/10/2025
A #postdoc position in atypical #ubiquitin signalling and protein binder engineering is opening soon in my lab at DTU Bioengineering! Get in touch if you are interested.
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Fletcher Lab @fletcherlab.bsky.social · 08/10/2025
🎉 Fletcher lab PhD student Emma Davies reflecting on her prize winning talk - we’re super proud of you Emma - many congrats! 🎉 @cvrinfo.bsky.social @uofgsii.bsky.social @uofgmvls.bsky.social
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Aaron Whiteley @aaronwhiteley.bsky.social · 08/10/2025
Our work on the Panoptes antiphage system is published! Here we find that Panoptes "watches" the cytosol for phage immune evasion proteins–captured in this illustration by Clair Huffine of Insight Illustrations. A beautiful example of the effector triggered immunity paradigm.
Illustration depicting a bacterium under assault by phage. The bacterium “sees” phage immune evasion proteins and protects itself using a newly described antiphage system called Panoptes, named for the many-eyed mythical giant Argus Panoptes. Credit: Clair Huffine Insight Illustrations LLC
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Ulad Litvin @ulad-litvin.bsky.social · 26/09/2025
Viro3D paper is out! We predicted 85,000 protein structures from human & animal viruses. 1/5 🧵 📑 Paper doi.org/10.1038/s443... 🔭 Explore virosphere viro3d.cvr.gla.ac.uk
doi.org
Viro3D: a comprehensive database of virus protein structure predictions | Molecular Systems Biology
imageimageViro3D provides proteome-level, high confidence AI-protein structure predictions for >4,400 viruses, allowing mapping of form and function across the human and animal virosphere. Viro3D i...
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Lorenz Lab @sonjalorenzlab.bsky.social · 24/09/2025
Allosteric activation of a ubiquitin ligase by an internal kinase domain! Congratulations to our team member Thornton Fokkens for this fascinating discovery in a neglected disease area with strong therapeutic need. Many thanks to all our great collaborators! www.sciencedirect.com/science/arti...
sciencedirect.com
A Leishmania virulence factor harnesses an allosteric kinase switch to regulate its ubiquitin ligase activity
Stringent control of ubiquitylation is a central requirement of signaling specificity in eukaryotes. Here, we discover a domain module integrating pro…
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Reposted by Fletcher Lab
Dr Liam Brierley @liambrierley.bsky.social · 18/09/2025
🚨📝 New work via @thepandemicinst.bsky.social now preprinted! We took ~19000 sequences of avian influenza virus and trained machine learning models on >40000 genomic/proteomic features - the resulting ensemble can predict zoonotic potential with AUC=0.95. More below! www.biorxiv.org/content/10.1...
biorxiv.org
An AI for an AI: identifying zoonotic potential of avian influenza viruses via genomic machine learning
Avian influenza remains a serious risk to human health via zoonotic transmission, as well as a feasible pandemic threat. Although limited zoonotic cases have resulted from the current epizootic outbre...
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Rune Busk Damgaard @rbdamgaard.bsky.social · 16/09/2025
A few months ago, our review “The Molecular Toolbox for Linkage Type-Specific Analysis of Ubiquitin Signaling” 🧬🧰🛠️ came out in ChemBioChem. Time to give it a spotlight! chemistry-europe.onlinelibrary.wiley.com/doi/full/10....
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Charlotte Lewis @cb99-lewis.bsky.social · 13/09/2025
Had a brilliant time at the 9th International Calicivirus Conference in Banff (www.calicivirusconference.com) - phenomenal science in a phenomenal setting! It was great to present my PhD work so far (thanks @dbhella.bsky.social for the pic). Here's to many more!
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Fletcher Lab @fletcherlab.bsky.social · 08/09/2025
Pre-print: our description of RZ affiliate ZNFX1 is now online. On binding viral RNA, ZNFX1 generates parallel Ub currents, coordinating Ub-dependent RNA silencing and aggregate resolution. Huge effort from first authors Dan Squair and @eilidhrivers.bsky.social www.biorxiv.org/content/10.1...
biorxiv.org
ZNFX1 uses two-component ubiquitin circuitry to quarantine viral RNA
The detection of viral RNA inside cells triggers a diverse range of antiviral responses, including global translation inhibition, interferon secretion and RNA sequestration. Mutations in the gene ZNFX...
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Lena Steckelberg @lenasteckelberg.bsky.social · 04/09/2025
So excited to see our newest study out in print! Led by the brilliant @jgezelle.bsky.social and @sophiekorn.bsky.social, we discovered how viruses from highly divergent families converge on a shared RNA structure mechanism to inhibit cellular nucleases. #RNAsky #LoveVirology
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Dan Grabarczyk @dangrabarczyk.bsky.social · 28/08/2025
Glad to share the final version of our story about the UBR4 complex, an E4 ligase protein quality control hub @science.org. Now with more cryo-EM structures and a deeper dive into substrate recognition, especially escaped mitochondrial proteins @clausenlab.bsky.social www.science.org/doi/10.1126/...
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Dan Grabarczyk @dangrabarczyk.bsky.social · 27/08/2025
Happy to share our work on the structure and function of the unusual E3 ligase ZNFX1 @cp-cell.bsky.social. It uses a nucleic acid-activated transthiolation mechanism, ubiquitinating and clustering RNA to protect cells in an immune response. @clausenlab.bsky.social www.cell.com/cell/fulltex...
cell.com
A split-site E3 ligase mechanism enables ZNFX1 to ubiquitinate and cluster single-stranded RNA into ubiquitin-coated nucleoprotein particles
Grabarczyk et al. show the structure and mechanism of a non-canonical ubiquitin ligase, which is activated through nucleic-acid-induced oligomerization and is critical for cell survival during immune ...
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Fletcher Lab @fletcherlab.bsky.social · 25/08/2025
Opening for a biochemist to help us in the characterisation of novel ubiquitin-based antivirals. Diverse backgrounds welcomed; a keen sense of adventure is a must 😁 Details and criteria are below; please get in touch with any questions. www.jobs.gla.ac.uk/job/research...
jobs.gla.ac.uk
Research Assistant/Associate
Research Assistant/Associate COLLEGE OF MVLSSchool of Infection & ImmunityResearch and TeachingGRADE 6/7 Job PurposeThe post holder will join the School of Infection & Immunity, MRC-Univers...
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Brennan Lab CVR @brennanlab.bsky.social · 13/08/2025
Post 5/5 🧵 IMPACT: This transforms tick-borne disease research: 🎯 New drug targets 🎯 Understanding vector competence 🎯 Virus-tick evolution Testing if mechanisms work across other tick viruses next. 👨‍🔬 collaborative project with @alf-castello.bsky.social and @alainkohlvirology.bsky.social
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ahellab.bsky.social @ahellab.bsky.social · 10/07/2025
A few years back we discovered a dual hybrid protein modification composed of ADP-ribose dinucleotide and ubiquitin (ADPr-Ub). Now we reveal that ADPr-Ub can be further ubiquitinated by the E3 ubiquitin ligase RNF114! www.nature.com/articles/s41... www.science.org/doi/10.1126/...
nature.com
Identification of RNF114 as ADPr-Ub reader through non-hydrolysable ubiquitinated ADP-ribose - Nature Communications
Deltex E3s modify ADP-ribosylated targets with ubiquitin, creating a hybrid modification whose readers remains unknown. Here, the authors synthesise a non-hydrolysable probe that mimics the modificati...
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Peter Mabbitt @petermabbitt.bsky.social · 09/07/2025
How predictable are the evolutionary pathways leading to insecticide resistance? Why do some species gain resistance while others do not? We explore these questions in our latest preprint. A huge effort from Rebecca Frkic, Alex Giang, Colin Jackson and the team. www.biorxiv.org/content/10.1...
Nine rounds of directed evolution resulted in LcαE7 variants with increased rates of OP-hydrolysis. Three LcαE7 genes (wild-type, G137D and R9) were introduced into the genome of Drosophila. Fluorometric substrate DEUP, and insecticides Diazinon and Paraoxon are shown with the scissile bond indicated in red.
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Ylva Ivarsson @ivarssonlab.bsky.social · 30/06/2025
We are looking for a PhD student in (mostly )wet-lab biochemistry to work on short linear motifs, intrinsically disordered regions, in the context of the Marie Curie network "IDPro". More info an apply here: www.uu.se/en/about-uu/...
uu.se
PhD student in Biochemistry - Uppsala University
PhD student in Biochemistry, Disciplinary Domain of Science and Technology, Faculty of Chemistry, Department of Chemistry - BMC, Uppsala University
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Clausen Lab @clausenlab.bsky.social · 24/06/2025
postdoc opening in vienna: study lipid droplets (LDs) with integrative structural biology, uncover how LD proteins shuttle between cytosol & nucleus to regulate lipid metabolism, organelle architecture and immune response. #VIP3 #lipidtime #cryoEM #coffee training.vbc.ac.at/post-docs/vi...
training.vbc.ac.at
VIP³ Post Doc Program (2025 - 2030)
VIP3 is a postdoctoral fellowship program at the Vienna BioCenter offering three – year fellowships that are open to candidates with backgrounds in life sciences, chemistry, physics, medicine, enginee...
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Alfredo Castello @alf-castello.bsky.social · 03/06/2025
🚨🚨 News from the @castello-lab.bsky.social and @shabazlab.bsky.social. Our work, led by Louisa Iselin, reveals pervasive changes in the RNA-bound proteome induced by interferon. #RNA, #immunity, #interferon, #host-virus www.biorxiv.org/content/10.1...
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Marine Petit @virotick.bsky.social · 23/05/2025
OMG! I can finally share my joy to see my SFTSV work published in @natcomms.nature.com! This adventure started by the award of my MSCA grant and my move to the Kohl and @brennanlab.bsky.social at @cvrinfo.bsky.social. Let's chat about how we discovered novel tick anti-viral effectors!
nature.com
Multi-omics analysis of SFTS virus infection in Rhipicephalus microplus cells reveals antiviral tick factors - Nature Communications
Severe Fever with Thrombocytopenia Syndrome Virus (SFTSV) is a deadly tick-borne virus and a growing global health threat. In this study, Petit et al. used a multi-omics approach on SFTSV-infected tic...
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Juraj Ahel @juraj-ahel.bsky.social · 22/05/2025
Happy that my work on RNF213 has been published as a part of doi.org/10.1038/s414...! Many thanks to all the groups involved: @clausenlab.bsky.social @e3chembio.bsky.social @fletcherlab.bsky.social Have a look at the summary from Fletcher lab for an insider perspective of the paper's history:
doi.org
ATP functions as a pathogen-associated molecular pattern to activate the E3 ubiquitin ligase RNF213 - Nature Communications
RNF213 is an E3 ligase with ATPase activity. Here, the authors show that RNF213 is activated by ATP binding and senses cellular energy states, and reveal a transthiolation mechanism induced by immune ...
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Jonathan Pruneda @jnpruneda.bsky.social · 17/05/2025
Sharing the next installment of our fun collaboration with @michaelnadbio.bsky.social at the interface of #ubiquitin and #ADP-ribosylation! Building upon our identification of cellular MARUbylation, we now identify reader/writer E3 ligases that extend K11 polyUb! 🧵 www.biorxiv.org/content/10.1...
biorxiv.org
A family of E3 ligases extend K11 polyubiquitin on sites of MARUbylation
Ubiquitin (Ub) cooperation with other post-translational modifications provides a tiered opportunity for protein regulation. Small modifications to Ub such as phosphorylation, acetylation, or ADP-ribo...
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Zha Lab @zhalab.bsky.social · 17/05/2025
Excited to share our new paper on Nature - how Ku accommodates Alu expansion in primates by binding to dsRNA, providing a clue for both the high levels of Ku and its essentiality in human cells. Thank @chaolinzhang @hchung03 @LenaSteckelberg More to come www.nature.com/articles/s41...
nature.com
Ku limits RNA-induced innate immunity to allow Alu-expansion in primates - Nature
Nature - Ku limits RNA-induced innate immunity to allow Alu-expansion in primates
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Fletcher Lab @fletcherlab.bsky.social · 14/05/2025
A wee summary of our paper: Tim and Juraj’s landmark paper from 2020 was the first to elucidate the structural and biochemical detail of RNF213, the largest known E3 and only AAA-E3 hybrid. Among many observations, two stood out: E3 activity was RING-independent and specific for the E2 UBE2L3.
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Fletcher Lab @fletcherlab.bsky.social · 13/05/2025
Great to see this out. A story that spanned continents, cities and budget codes… www.nature.com/articles/s41... Big thanks to all the teams involved! @clausenlab.bsky.social @e3chembio.bsky.social
nature.com
ATP functions as a pathogen-associated molecular pattern to activate the E3 ubiquitin ligase RNF213 - Nature Communications
RNF213 is an E3 ligase with ATPase activity. Here, the authors show that RNF213 is activated by ATP binding and senses cellular energy states, and reveal a transthiolation mechanism induced by immune ...
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Shabaz Lab @shabazlab.bsky.social · 07/04/2025
Very happy to see Honglin Chen's DPhil work and and @alf-castello.bsky.social passion project (aren't all projects passion projects in academia?) finally get published! www.mcponline.org/article/S153...
mcponline.org
Omics analyses uncover host networks defining virus-permissive and -hostile cellular states
The capacity of host cells to sustain or restrict virus infection is influenced by their proteome. Understanding the compendium of proteins defining cellular permissiveness is key to many questions in...
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