Reposted by Sebastian SiegnerbioRxivpreprint @biorxivpreprint.bsky.social · 03/09/2026Trans-branching of polyubiquitin chains orchestrates the DNA replication stress response www.biorxiv.org/content/10.64898/20… 033
Reposted by Sebastian SiegnerLopes_Lab @lopeslab.bsky.social · 16/09/2026Thrilled to share a new important study from the lab, published today in @nature.com, showing how cohesin mediates efficient replication fork plasticity and stress response, using its loop extrusion activity to promote 3D contacts on replicating DNA: www.nature.com/articles/s41...nature.comCohesin reshapes replication fork contacts to aid fork slowing and reversal - NatureCohesin-mediated loop extrusion limits sister-fork coupling and tethers nearby replication forks under replication stress, promoting fork reversal and slowing fork progression to safeguard genome... 46935
Reposted by Sebastian SiegnerInstitute of Molecular Systems Biology @imsb-eth.bsky.social · 09/09/2026Fucoidans from brown algae and diatoms drive marine carbon sequestration partly because they're hard to break down. Sichert et al. show how synergistic interactions between degraders are critical for their degradation, giving insights into ocean carbon cycling www.nature.com/articles/s41...nature.comSynergistic degradation of fucoidans in the ocean - NatureEfficient degradation of fucoidans depends on complementary bacterial guilds that cooperatively break backbone and side-chain sugars, revealing a conserved, globally relevant mechanism that shapes mar... 023
Reposted by Sebastian SiegnerJacob Corn @jcornlab.bsky.social · 14/07/2026Do you work in #cancer and feel behind-the-curve in #CRISPR state of the art? Get up to speed fast with this review! Huge kudos to Joshua Casan, Samuel Grigg, and Carolyn Shembrey for heavy lifting to pull this together. www.nature.com/articles/s41...nature.comCRISPR in clinical oncology: translational advances from molecular diagnostics to therapeutics - Nature Reviews Clinical OncologyCRISPR–Cas technologies provide a modular, programmable platform for sequence-specific targeting of DNA or RNA and have advanced from experimental molecular biology tools to clinical translation. This... 043
Reposted by Sebastian SiegnerJacob Corn @jcornlab.bsky.social · 30/06/2026Do you need a super active #CRISPR Cas for in vivo editing? I have not one, but two options for you. Activities rival SpyCas9, but they fit into an scAAV. Check out our latest paper, co-led by Fedor Gorbenko and Irene Sala. Just out in Genome Research. link.springer.com/article/10.1... 054
Reposted by Sebastian SiegnerAlberto Ciccia @albertociccia.bsky.social · 08/06/2026Excited to finally share our preprint on mapping the genetic interaction network of the DNA damage response with combinatorial knockout screens led by Sam Hayward, Alina Vaitsiankova, and Tomas Lama-Diaz! www.biorxiv.org/cgi/content/...biorxiv.orgMapping the genetic landscape of the DNA damage response with Cas12a-based combinatorial knockout screensThe DNA damage response (DDR) is a complex network of cellular pathways that ensures the faithful maintenance of our genomes upon a wide array of genomic insults. To elucidate the functional architect... 23821
Reposted by Sebastian SiegnerPedro Beltrao @pedrobeltrao.bsky.social · 25/05/2026new lab preprint - Protein function prediction is a well established problem but proteins exist in different post-translationally modified forms. Here, @julianvangerwen.bsky.social built a ML model to predict the biological process regulated by individual phosphosites www.biorxiv.org/content/10.6...biorxiv.org 13516
Reposted by Sebastian SiegnerDoksani Lab @doksanilab.bsky.social · 30/04/2026How do cancer-associated eccDNAs arise? Our work shows that single-strand DNA damage in repetitive sequences can trigger i-loop formation and eccDNA generation. What started at telomeres may reflect a much broader principle across the genome and help explain how ecDNA may emerge in cancer. 1/2 165
Reposted by Sebastian SiegnerJacob Corn @jcornlab.bsky.social · 18/03/2026Proper organelle regulation during mitosis is a must, but how do membrane-less condensates like PML bodies behave during cell division? In work led by Eric Aird, we found the balance of speckled proteins SP110 & SP100 to be the key. doi.org/10.1038/s415... 12013
Reposted by Sebastian SiegnerJacob Corn @jcornlab.bsky.social · 12/03/2026Many genome-editing tools work by cutting DNA - but the shape of the cut matters. Using genome-wide screening, we show ERCC6L2 is specifically required to maintain repair fidelity at staggered DNA breaks, but not at blunt ends. www.nature.com/articles/s41... 1165
Reposted by Sebastian SiegnerAlberto Ciccia @albertociccia.bsky.social · 17/02/2026Happy to share our new pre-print on the dependency of ALT-positive tumors on the DNA translocase SMARCAL1. Outstanding work of @angelotaglialatela.bsky.social in collaboration with the Min, Lazzerini Denchi and @cejkalab.bsky.social laboratories! www.biorxiv.org/content/10.6...biorxiv.org 0219
Reposted by Sebastian SiegnerAndrás Tálas @andrastalas.bsky.social · 05/02/2026Very cool work published in @science.org led by OanaPelea, happy to participate! www.science.org/doi/10.1126/...media.tenor.coma man wearing a beanie and a black jacket is smiling and holding a piece of food .ALT: a man wearing a beanie and a black jacket is smiling and holding a piece of food . 021
Reposted by Sebastian SiegnerLuijsterburglab @luijsterburglab.bsky.social · 15/01/2026Excited to share our new Nature study! 🧬 We (sidrituruci.bsky.social et al) discovered that CFAP20 helps clear stalled RNAPII, preventing harmful clashes with DNA replication machinery. This protects cells from R-loops and genome instability. Full paper: www.nature.com/articles/s41... 56522
Reposted by Sebastian SiegnerLopes_Lab @lopeslab.bsky.social · 08/01/2026One more upcoming appointment with great science via the Genome Integrity Italian Network (GiiN). Don't miss it, just join via the link 👇 0117
Reposted by Sebastian SiegnerMax Planck Institute of Molecular Cell Biology and Genetics @mpi-cbg.de · 11/12/2025New research group leader @matthiasmuhar.bsky.social joins @mpi-cbg.de! 🥳 With his group "Functional genomics of proteome remodeling,” Matthias wants to pursue high-throughput genetic studies to understand how protein turnover is regulated. Welcome, Matthias! www.mpi-cbg.de/news-outreac...mpi-cbg.deNew research group leader for functional genomicsMolecular biologist Matthias Muhar becomes part of the MPI-CBG faculty 04415
Reposted by Sebastian SiegnerJacob Corn @jcornlab.bsky.social · 10/11/2025Congrats to Moritz Schlapansky, who successfully defended his PhD thesis on Friday! You can read his work on "scOUT-seq" profiling of single cell transcriptomes + editing outcomes in millions of cells and living mice at www.biorxiv.org/content/10.1... 022
Reposted by Sebastian SiegnerJacob Corn @jcornlab.bsky.social · 28/10/2025Sometimes #Cas9 is too dang big. But mini Cas proteins are bad at both NHEJ & HDR. PhD student Fedor Gorbenko used mammalian cell evolution for *HDR* to make REALLY super #Cas12f1 and #TnpB. As good as or better than Cas9! Base editors included! www.biorxiv.org/cgi/content/short/2025.10.27.684765v1biorxiv.orgDirected evolution of compact RNA-guided nucleases for homology-directed repair in mammalian cellsRNA-guided nucleases enable DNA editing and offer promise for treating genetic diseases, particularly when used for precise sequence replacement. However, many of the most effective enzymes, such as S... 193
Reposted by Sebastian SiegnerETH Zurich @ethz.ch · 27/10/2025Thanks to CRISPR/Cas technology, researchers can precisely edit genetic material to treat hereditary diseases. To achieve this, they need to identify undesirable cuts in the genome at an early juncture. Pioneer Fellow Lilly van de Venn is developing such testing methods. ethz.ch/en/news-and-...ethz.chAn ETH spin-off aims to bring gene scissors to the clinicThanks to CRISPR/Cas technology, researchers can precisely edit genetic material to treat hereditary diseases. To achieve this, they need to identify undesirable cuts in the genome at an early junctur... 153
Reposted by Sebastian SiegnerJacob Corn @jcornlab.bsky.social · 24/10/2025Ever noticed that #CRISPR editing results differ between cells? Awesome PhD student Moritz Schlapansky developed "scOUT-seq" to measure single cell transcriptomes + editing. 1.2 million cells, 74 cell types, living 🐭. Cell subtypes differ wildly from bulk average! www.biorxiv.org/content/10.1...biorxiv.orgCell-stereotyped DNA repair outcomes are widespread during genome editingGenome editing outcomes are governed by DNA repair pathways that vary with cell type and state. We developed scOUT-seq (single-cell Outcomes Using Transcript sequencing), a scalable approach that join... 31811
Reposted by Sebastian SiegnerMatthias Muhar @matthiasmuhar.bsky.social · 21/10/2025On that note: hello world! My new lab on genetics of proteome remodeling is starting at the incredible MPI-CBG. We have big plans and open positions for PhD students and an RA. Apply now (!) at imprs.mpi-cbg.de and tinyurl.com/2vywj6f6 respectively. 2105
Reposted by Sebastian SiegnerMax Planck Institute of Molecular Cell Biology and Genetics @mpi-cbg.de · 20/10/2025If you are interested in a PhD in the area of "Mechanisms of Genome Stability" and "Functional Genomics of Proteome Remodelling," apply now for a PhD @mpi-cbg.de! Overview of all participating RGLs: imprs.mpi-cbg.de/5761/researc... 053
Reposted by Sebastian SiegnerJohannes Zuber @johanneszuber.bsky.social · 09/10/2025Just out in @science.org: Together with the lab of @wilhelmpalm.bsky.social, we used sequential in-vitro/in-vivo CRISPR screens to decipher metabolic adaptations in tumors. We find that acidosis is a dominant factor that shapes energy metabolism and stress resilience. www.science.org/doi/10.1126/... 111229
Reposted by Sebastian SiegnerSylvie Noordermeer @sylvie-noordermeer.bsky.social · 18/09/2025Happy to share our latest research on the BRCA1-BRCTs now online. academic.oup.com/nar/article/... Congrats to first author Venda for putting it all together! This project was a great collaboration with the @titiasixma.bsky.social lab who helped us give structural meaning to our observations.academic.oup.comValidate User 1196
Reposted by Sebastian SiegnerDaniel Durocher @durocher1.bsky.social · 10/09/2025New work from the lab! 🔬 We report that DDIAS is a new component of the mitotic CIP2A-TOPBP1 pathway of genome maintenance. 1/n www.biorxiv.org/content/10.1...biorxiv.orgMitotic single-stranded DNA suppression by DDIASIncomplete DNA replication and chromosome breakage during mitosis pose major threats to chromosome segregation. The CIP2A-TOPBP1 complex acts to mitigate this peril, but its exact role is not yet unde... 24917
Reposted by Sebastian SiegnerDaniel Durocher @durocher1.bsky.social · 28/08/2025JOB ALERT 🚨 We are hiring TWO principal investigators in cell, molecular, systems, or chemical biology in Toronto, Canada at @sinaihealth.bsky.social. We provide a generous startup, fully funded salary and academic appointment at U of Toronto. www.nature.com/naturecareer... Please repost! 0135169
Reposted by Sebastian SiegnerMartin Pacesa @martinpacesa.bsky.social · 27/08/2025Exciting to see our protein binder design pipeline BindCraft published in its final form in @Nature ! This has been an amazing collaborative effort with Lennart, Christian, @sokrypton.org, Bruno and many other amazing lab members and collaborators. www.nature.com/articles/s41... 14305109
Reposted by Sebastian SiegnerLuuk Loeff @lloeff.bsky.social · 18/08/2025Exciting times ahead! Today marks the first day of the Loeff Lab at Leiden University Medical Center in the Netherlands 🇳🇱. I’m thrilled to begin this new adventure and continue exploring microbial defense mechanisms and their applications through an integrative structural biology approach. 10659
Reposted by Sebastian SiegnerSarah Moser @sarahmoser.bsky.social · 13/08/2025Thrilled to share our latest work, just published in @nature.com ⬇ www.nature.com/articles/s41... We discovered that PARP inhibitors 💊 trigger histone eviction from the chromatin and this creates a hidden vulnerability in PARPi resistant tumors. 🧵 (1/8)nature.comNASP modulates histone turnover to drive PARP inhibitor resistance - NaturePARP inhibitor treatment triggers histone release from the chromatin in cancer cells; consequently, targeting the histone chaperone NASP renders cells vulnerable to PARP inhibition. 38332
Reposted by Sebastian SiegnerAndreas Panagopoulos @apanagopoulos.bsky.social · 21/05/2025Delighted to share that the results of my main postdoc project are now published in @nature.com 🔗 doi.org/10.1038/s415...doi.orgMultigenerational cell tracking of DNA replication and heritable DNA damage - NatureA multigenerational single-cell tracking approach provides a framework to dissect phenotypic plasticity at the single-cell level, offering insights into cellular processes that may resemble early even... 89334
Reposted by Sebastian SiegnerAndrás Tálas @andrastalas.bsky.social · 20/05/2025Our paper describing an RNA-LNP prime editing strategy for treating phenylketonuria was published today in Nature Biomedical Engineering (1/7) www.nature.com/articles/s41... @schwanklab @UZH_Science @UZH_en @KispiZuerich @ethz.chnature.comTreatment of a metabolic liver disease in mice with a transient prime editing approach - Nature Biomedical EngineeringA transient in vivo prime editing strategy is developed for the liver by delivering the prime editor as mRNA encapsulated in LNP. 164
Reposted by Sebastian SiegnerLopes_Lab @lopeslab.bsky.social · 07/05/2025Exciting PhD project available in our lab (time sensitive)! 👇 11015
Reposted by Sebastian Siegnerspjacksongroup.bsky.social @spjacksongroup.bsky.social · 14/04/2025Thrilled to see this “veritable tour de force” led by John_C_Fielden from Jacob Corn lab out @nature.com, rdcu.be/ehd4E. This @erc.europa.eu funded project uses #CRISPRi to systematically scan 548 DDR genes for synthetic lethal interactions, ~150,000 pairwise combinations!rdcu.beComprehensive interrogation of synthetic lethality in the DNA damage responseNature - Combinatorial CRISPRi screening was used to map genetic interactions in DNA damage response pathways, revealing known and new connections, including the roles of WDR48 and USP1 in... 1105
Reposted by Sebastian SiegnerJacob Corn @jcornlab.bsky.social · 12/02/2025New #preprint from the lab! Do you want to see the invisible? So did we! When DNA genomes get broken, cells somehow find related sequences to fix the break. But how do they find it? We developed a way to look at sequence *search*, not just sequence usage. doi.org/10.1101/2025...doi.org 23422
Sebastian Siegner @sebasiegner.bsky.social · 29/01/2025Very cool study about selective protein degradation by FBXO31! 031