New preprint! In collaboration with the Yogev lab (Yale), we characterized and determined structures of various gamma-tubulin complexes from C. elegans, showing how divergent worm subunits evolved to template non-canonical (11-pf) and possibly canonical (13-pf!) microtubules: tinyurl.com/2sapyx2b
Kashish Singh
@kashishsingh.bsky.social
Postdoc @Carter_Lab @MRC_LMB. Alumnus of the Stark lab @mpi_nat.
Structural basis of biofilm formation mediated by the Pseudomonas aeruginosa fibrillar adhesin CdrA led by @olivia--smith.bsky.social Collaboration with @alexbateman1.bsky.social , Andres Floto and @geiselbiofilm.bsky.social labs
Scientists at Cambridge's @loke-ctr.bsky.social have, for the first time, used base editing to study gene function in human embryos. In future, the findings could help to improve IVF success rates and better understand early pregnancy loss. Read more: https://bit.ly/4aQOAZD
New preprint! In collaboration with the Steinmetz Lab at PSI we report cryo-EM structures of microtubules at up to 1.9 Å (!) resolution & in different nucleotide state mimics, suggesting a mechanism for lattice-induced GTP hydrolysis and why it leads to catastrophe: tinyurl.com/7cjrf863
📢 (1/2) Excited to share the first preprint from my PostDoc! We developed UbSeRP to map co-translational ubiquitination in a translatome-wide, revealing thousands of quality control sites, and how they reshape with aging. www.biorxiv.org/content/10.6... #proteostasis #ribosomes #preprint
Ubiquitin selective ribosome profiling reveals systematic principles of co-translational quality control
Protein biogenesis is a stress- and error-sensitive process that can lead to nascent protein misfolding and aggregation, challenging cellular proteostasis. Co-translational ubiquitination (CTU) is a c...
biorxiv.org
Now published! We investigated how polyadenylated RNAs are targeted for decay in the human nucleus. www.nature.com/articles/s41... (1/5)
Check out our latest research, just published in Nature @nature.com @molbiolau.bsky.social @au.dk Molecular basis of polyadenylated RNA fate determination in the nucleus www.nature.com/articles/s41...
Molecular basis of polyadenylated RNA fate determination in the nucleus - Nature
Biochemical, structural and cell biological analyses reveal that UAP56 (DDX39B) assembles with a TREX-2–like module that redirects non-functional polyadenylated RNAs from export to degradati...
nature.com
How do cells distinguish functional genetic messages from molecular noise? Researchers in Clemens Plaschka's lab at IMP, together with Julius Brennecke's lab at IMBA and collaborators at Aarhus University, reveal a new principle of gene regulation: https://www.nature.com/articles/s41586-026-10650-0
There are lots of exciting opportunities to join the in situ structural biology community at Leeds this Autumn - 2 studentships in the Cheney PhD program (astbury.leeds.ac.uk/cheney-phd/) and I am recruiting a PhD student and research assistant. Please share and send any future tomographers our way!
Cheney Scholarship PhD Programme : The Astbury Centre for Structural Molecular Biology - "Understanding Life in Molecular Detail"
Applications are open for 2 PhD student places. Closing date for applications is Thursday 26 June, 5pm. Interviews will be held on 9th July 2026. The Cheney Scholarship is a prestigious 4-year PhD pr...
astbury.leeds.ac.uk
New preprint! In collaboration with @xujwet.bsky.social, @pedrobeltrao.bsky.social, and Akhmanova and Beekman groups, we determined the structure of the transition zone microtubule doublet in mammalian motile cilia, providing potential insights into the regulation of IFT: tinyurl.com/fssnevuc
Structure of the mammalian ciliary transition zone microtubule doublet
The ciliary transition zone gates bidirectional protein trafficking to maintain the specialized ciliary proteome using microtubule doublets as a scaffold. While ciliary axonemal doublets are well-char...
tinyurl.com
Disrupting phage liquid crystalline droplets restores antibiotic susceptibility in Pseudomonas aeruginosa biofilms out in @plosbiology.org by @abultarafder.bsky.social and team. Exciting collaboration with @geiselbiofilm.bsky.social @pearce-maths.bsky.social and others
#Biofilm matrices containing filamentous phages help #Pseudomonas aeruginosa tolerate antibiotics. @abultarafder.bsky.social @tbharat-lab.bsky.social &co show that #nanobody disruption of #phage Pf4 #LiquidCrystalline droplets restores #antibiotic susceptibility @plosbiology.org 🧪 plos.io/4xkd6Mw
Design principles of human membrane protein topology. New study from Haoxi Wu @ox.ac.uk and Ramanujan S Hegde @mrclmb.ac.uk: rupress.org/jcb/article/... #membrane #lipid
🚨 New in @natureportfolio.nature.com! 🚨 Excited to share our discovery of Manikomycin—a novel antibiotic tackling the AMR crisis! 🦠 Using cryo-EM, we found it’s the first-in-class to target the ribosomal E-site, blocking tRNA entry and beating multi-drug resistance. Read: doi.org/10.1038/s415...
A natural depsipeptide antibiotic binds the E-site of the bacterial ribosome - Nature
Improved fractionation strategies can identify antibiotics with previously unseen scaffolds and mechanisms, exemplified by manikomycin from Streptomyces rimosus, which acts by targeting the E-site of ...
doi.org
Really happy to share our latest work on the dynactin complex. We were so surprised to find that overexpression of dynactin p50 causes part of the dynactin complex to form clusters that contain our recently discovered dynactin assembly factor VezA/vezatin. www.biorxiv.org/content/10.6...
We present: Index-agnostic oblique plane light sheet microscopy of centimetre-scale cleared tissues at subcellular resolution www.biorxiv.org/content/10.6...
TL;DR: We've identified more than 100 cases of apparent manipulation in Thermo Fisher Scientific's antibody verification data. @sholtodavid.bsky.social @johanduchene.bsky.social reeserichardson.blog/2026/05/28/h...
How much of Thermo Fisher’s antibody data has been manipulated?
We’ve documented more than 100 instances of apparent data manipulation in Thermo’s catalog
reeserichardson.blog
New preprint alert! Ever wonder if cells can talk to each other? Tunneling nanotubes (TNTs) are tiny bridges between cells used to pass organelles, nucleic acids, proteins & even viruses but we've never seen inside them clearly. Until now! 👇🧵 biorxiv.org/content/10.64898/2026.05.27.728322v1
We're happy to announce our new preprint! 🐸 easymode: general pretrained networks for cellular cryo-ET. Segment ~20 cellular features – ribosomes, microtubules, mitochondria, nuclei & more – with zero model training. 🔗 doi.org/10.64898/202... 🧵👇
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...
How do sperm and egg fuse? Surprisingly, we still don’t fully know… Our field has uncovered many pieces of the fertilization puzzle, but not how they fit together. We identify ✨ SPARK ✨ - a conserved sperm complex that couples sperm-egg binding to fusion. tinyurl.com/34cm4xat Read on! 🧵👇
How do mitochondrial ribosomes keep pace with membrane insertion? Now out in NSMB: We show that mitoribosomes slow down at defined positions linked to membrane insertion and protein topology: rdcu.be/fhqIT #Mitochondria #Ribosome #CryoEM
Membrane insertion of mitochondrial-encoded proteins regulates ribosome decoding speed
Nature Structural & Molecular Biology - Schöndorf and Petrychenko et al. show that mitochondrial translation speed is coupled to OXA1L-mediated inner membrane insertion, with...
rdcu.be
Thrilled to see this work published. Thanks to helpful reviewer suggestions, there are some exciting new insights that were not in the preprint (particularly in Figure 4). www.nature.com/articles/s41...
Structural basis for recognition of diverse localizing mRNAs by Egl–BicD - Nature Structural & Molecular Biology
Singh et al. combine cryo-electron microscopy and functional studies to reveal how a single protein complex selects diverse mRNAs for subcellular localization using a combination of shape, positional ...
nature.com
The hidden rules behind mRNA transport. A collaborative study between @simonbullock11.bsky.social & @carter-lab.bsky.social’s groups has found a structural code that explains how cells selectively transport mRNAs. Read more: mrclmb.ac.uk/news-events/... #LMBNews @cellbiol-mrclmb.bsky.social 🧪
Our latest preprint list is now up on FocalPlane. This week, bioimage analysis takes centre stage! focalplane.biologists.com/2026/05/01/m... #microscopy #bioimageanalysis #preprints
Microscopy preprints: bioimage analysis - FocalPlane
Microscopy preprints: bioimage analysis - News
focalplane.biologists.com
Really exciting to see our new review published! This review explores the evolutionary history of the extra-embryonic endoderm, an evolutionarily ancient tissue co-opted to form the yolk sac, and explores how in vitro models are uncovering its biology. Check it out here: doi.org/10.1242/dev....
The vertebrate yolk sac: evolutionary origins and current advances in in vitro models
Summary: This Review examines the evolutionary history of the extra-embryonic endoderm, an evolutionarily ancient tissue co-opted to form the yolk sac, and explores how in vitro models are uncovering ...
doi.org
Check out this new study led by @amicoennio.bsky.social , with important contributions from @sami-c.bsky.social, @abidalilab.bsky.social and @leonmichalski.bsky.social. The work dissects how dynein–dynactin engages distinct adaptors to drive transport of diverse cargoes within cells.
New preprint! We asked a simple question: How do very different activating adaptors all activate dynein? Turns out: same architecture, wildly different implementations 🧵👇 doi.org/10.64898/202...
The #ADFLIP approach by @kaiyi94.bsky.social and @kjamali.bsky.social, combined with their approach to backpropagation through #AlphaFold2, is really powerful. Keep tuned for more exciting results! 🥳
Thrilled with the our results with @kjamali.bsky.social and @sjorsscheres.bsky.social from the recent binder competition! 🎉 2 of our 7 designs successfully bound to the target, with affinities ranking 2nd and 3rd overall. All of these designs targeted the disordered region of the protein.
Excited to share our discovery of a new programmable RNA-guided DNA-targeting system hiding inside bacteriophages that predates CRISPR. We call it VIPR (Viral Interference Programmable Repeat), and it uses an entirely new logic to find its targets. Thread + link below.
We're excited to have our first webinar in our new webinar series on quantitative plant imaging happening this Thursday! For more info and to register for the webinar: focalplane.biologists.com/2026/03/30/n...
New webinar series on plant imaging - FocalPlane
New webinar series on plant imaging - News
focalplane.biologists.com
📢 Two weeks to go until the first webinar in our new series on quantitative plant imaging across scales. We’ll hear from @blace.bsky.social and Simon Gilroy in this webinar chaired by @ajcellbio.bsky.social and @joemckenna.bsky.social.
Preprint 🧵! I’m really excited to introduce BIGSMALL, an interleaved multi-magnification cryo-ET scheme bridging molecular and cellular scales in a single acquisition! BIGSMALL = 𝐁road 𝐈nformation 𝐆athering 𝐒trategy by 𝐌ultiscale 𝐀cquisition of lame𝐋𝐋a www.biorxiv.org/content/10.6... (1/6)
A new paper in which we could contribute structural insights to the great biochemical work from our collaborators from UNC Chapel Hill. Sascha Amann from our lab was yet again able to solve several very challenging structures. This time of a SCF with Protac and target www.nature.com/articles/s41...
Structural basis of NSD2 degradation via targeted recruitment of SCF-FBXO22 - Nature Communications
Compound-mediated targeted protein degradation through the recruitment of Ub ligases is an emerging field. Here, the authors determine key structural and biochemical principles for harnessing SCF-FBXO...
nature.com
Cells have a built-in cleanup system to remove unwanted proteins, and scientists can hijack it to destroy cancer drivers. Now, researchers from our Haselbach lab and collaborators reveal how this works in near-atomic detail: https://www.nature.com/articles/s41467-026-72235-9