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Ioannis Tsirkas

@ioannistsirkas.bsky.social
113 followers 323 following 70 posts

Post doc and manga lover, I will be sharing science-related stuff and manga reads.

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Reposted by Ioannis Tsirkas
Hasan Yardimci @hyardimci.bsky.social · 20/08/2026
Delighted to share our latest publication, a collaborative work with @hanasedlackova.bsky.social and @puckknipscheer.bsky.social. Grateful to everyone who contributed to this project. www.cell.com/cell-reports...
cell.com
FANCJ and RTEL1 facilitate pre-replication complex disassembly following replisome collision
Cameron et al. show that dormant pre-replication complexes are removed upon collision with replication forks in Xenopus egg extracts. They identify FANCJ and RTEL1 as key factors in this process and s...
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Reposted by Ioannis Tsirkas
4R: R-loop Regulation in Robustness and Resilience @4r-rtg.bsky.social · 18/08/2026
Registration for the 18th RNase H meeting (November 4-6, Mainz, Germany) is open and ongoing. Register by September 15th via 4R RTG website: 4r-rtg.de/rnase-h-2026/ #IMB #RNASEH2026 #4R-RTG #Rloop #Transcription
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Reposted by Ioannis Tsirkas
PLOS Biology @plosbiology.org · 05/08/2026
Graphing and statistically analyzing data is challenging without coding expertise. This Community Page by @avishenoy.bsky.social introduces grafify online, a free, browser app for generating publication-quality graphs and performing statistical tests and comparisons. 🧪 #AcademicSky plos.io/3RpUg6E
Types of graphs and color schemes available in grafify online.
A. Examples of graphs that can be plotted with grafify online. Box and whiskers and violin plots show a line at the median with a box representing the interquartile range (IQR) and whiskers that show 1.5× IQR. Bar graphs and point and error-bar plots show the mean, and the dispersion can be shown as standard deviation (default), standard error of mean, or 95% confidence intervals. Before–after plots show matched data. Numeric XY graphs have numeric variables on both and X- and Y-axes and require a grouping variable that is either categorical (Numeric XY 1) or numeric (Numeric XY 2). B. Categorical (left) and numeric (right) color palettes that are accessible to colorblind individuals
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Karolina Kuodyte @kuodyte.bsky.social · 04/08/2026
Excited to share our paper, now out in @jcb.org! 🎉 Co-led with @georgegalea.bsky.social at embl.org, we uncover a new layer of spatiotemporal regulation of the #DNADamageResponse between the Golgi and the nucleus, revealing an active role of the Golgi in #DNArepair. doi.org/10.1083/jcb.... 📷by me ❤️
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Andrew Deans @genomestability.bsky.social · 05/08/2026
Amazing structures, and distinct binding modes, of TOPBP1 or ETAA1 activating the ATR-ATRIP kinase by an allosteric mechanism. In NSMB from Pavletich lab: www.nature.com/articles/s41...
nature.com
Structural mechanism of TOPBP1 activating the ATR–ATRIP replication checkpoint kinase - Nature Structural & Molecular Biology
Li et al. present cryo-EM structures of the ATR–ATRIP complex bound to the ATR-activating domains of TOPBP1 and ETAA1; these reveal distinct binding modes and allosteric mechanism of activation for TO...
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SlenderSherbet @slendersherbet.bsky.social · 23/07/2026
"Good morning. Can you spare a few minutes to talk about our Lord and Saviour Godzilla"
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Dr Karen Pinder 🇨🇦 🔬 @drkarenpinder.bsky.social · 06/07/2026
You guuuuuyyyyzzzz! This is a freeze fracture electron microscope image of the nuclear pores in a nuclear membrane and you guuuuuyyyyzzzz I get paid to teach it! 🤓 😍 📷: fineartamerica.com/featured/fre...
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Nitika Taneja @TanejaLab @nitikataneja.bsky.social · 01/07/2026
Very excited to share our new Nature study! We discovered that replication stress stabilizes CTCF-dependent chromatin loops enclosing stressed nascent DNA, where G9a-mediated heterochromatin protects it from nucleolytic degradation. rdcu.be/frzLg Huge thanks to all our collaborators and co-authors!
nature.com
Replication-stress-induced chromatin loops protect fork stability - Nature
Replication stress induces the formation of transient chromatin loops that enclose de novo heterochromatin-enriched stalled replication forks.
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Heather Spaulding (Akalsha) @akalsha.bsky.social · 26/06/2026
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4R: R-loop Regulation in Robustness and Resilience @4r-rtg.bsky.social · 23/06/2026
Registration for the 18th RNase H meeting is open! Join us at IMB Mainz from 04–06 November 2026 for the “RNase H 2026”, organized by 4R RTG and IMB Mainz. Don't miss this conference and register now via: 4r-rtg.de/rnase-h-2026/ #IMB #RNASEH2026 #4R-RTG
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Reposted by Ioannis Tsirkas
Marco Fumasoni @marcofumasoni.bsky.social · 19/06/2026
Our paper on the evolution of cellular miniaturization is now out in PNAS! www.pnas.org/doi/10.1073/... A short recap 🧵
pnas.org
PNAS
Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...
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Timothy Caulfield @caulfieldtim.bsky.social · 19/06/2026
Do vaccines save lives? Yep! Does antivaxx BS kill? Yep. 👇 Cervical cancer deaths for vaccinated young women fall to zero in England: study www.ctvnews.ca/health/artic...
ctvnews.ca
Cervical cancer deaths for vaccinated young women fall to zero in England: study
The HPV vaccine for cervical cancer has reduced the risk of dying from the disease before the age of 30 in England to almost zero, the first study of its kind showed Thursday.
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👻 Spooky-Zozo 🖤 @summonzozo.bsky.social · 16/06/2026
🖤✨
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Ioannis Tsirkas @ioannistsirkas.bsky.social · 02/06/2026
After 9 months of major revisions, 2 out of 3 reviewers were stilll not satisfied, and the editor decided to reject our manuscript. It's been a whole year since we first submitted our paper to a journal, and I am back to timepoint zero 😭😭
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Reposted by Ioannis Tsirkas
Mark Peifer (He, him) @peiferlabunc.bsky.social · 23/05/2026
Someone in the news departments of @nature.com or @science.org needs to take a look at this--its a huge scandal from the scientific supplier that has become a monopoly
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Anime News Network @animenewsnetwork.com · 13/05/2026
We're getting the new Fairy Tail manga miniseries one week sooner!
animenewsnetwork.com
New Fairy Tail Manga Miniseries to Start 1 Week Sooner on July 29
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The EMBO Journal @embojournal.org · 07/05/2026
SLX4IP acts as a genome-wide brake on BLM helicase activity to preserve replication fork stability under stress – both globally and at ALT telomeres Stephanie Panier @spanier55.bsky.social, Kavi Mehta @k4v1.bsky.social and coworkers link.springer.com/article/10.1...
link.springer.com
SLX4IP limits replication stress globally and at ALT telomeres - The EMBO Journal
Faithful DNA replication is essential for genome stability, yet replication forks face constant stress. The Bloom syndrome helicase (BLM) safeguards fork integrity, but excessive BLM activity can itse...
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Dr. Mar @boldnewme.bsky.social · 06/05/2026
🎯
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Ioannis Tsirkas @ioannistsirkas.bsky.social · 04/04/2026
#Vegan #Burger, with a patty made out of lentils. Contains also vegan cheese, tomatoes, onions, cucumber pickles, ketchup, hummus and tahini. Really really good.
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Reposted by Ioannis Tsirkas
Sarah McAnulty, Ph.D. @sarahmackattack.bsky.social · 24/03/2026
Okay so why was I the only one in the theater tonight who gasped when Ryan Gosling ran a centrifuge with two tubes in the whole thing, sitting right next to each other? Sorry was I the only scientist in the film society theater tonight??
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ME Torres-Padilla @metorrespadilla.bsky.social · 09/02/2026
We go live!!! Join us Munich July5-7th to hear exciting research on #Replication by leaders in the field AND !! registration is FREE 🥳 (but mandatory) - we hope to see many in Munich 🍺 @helmholtzmunich.bsky.social @replifate.bsky.social @epicrossborders.bsky.social replifate.eu/event/meetin...
replifate.eu
Events for February 2026
06-07 July 2026 | Munich, GermanyDNA Replication and Its Impact on Genome and Chromatin MaintenanceWe are RepliFate, a European Training Doctoral Network dedicated to understanding how DNA replication...
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Kumar Somyajit & Lab @ksomyajit.bsky.social · 29/01/2026
Dear Colleagues, Delighted to share that our first lab paper is now published in Nature.!!! 😊😊😊 We identify a previously concealed “safety limit” in DNA replication program: cells intrinsically rate-limit PCNA via PAF15, shaping strand-specific and global replication dynamics. 👉 rdcu.be/e1bBt
rdcu.be
PAF15–PCNA exhaustion governs the strand-specific control of DNA replication
Nature - PCNA–PAF15 has a key role in determining replisome dynamics during genome replication and protecting against genome instability.
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Reposted by Ioannis Tsirkas
bioRxivpreprint @biorxivpreprint.bsky.social · 21/12/2025
Real-Time Segmentation and Classification of Birdsong Syllables for Learning Experiments www.biorxiv.org/content/10.64898/20…
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Ioannis Tsirkas @ioannistsirkas.bsky.social · 14/12/2025
Mech Arena link.plrm.zone/sdlgo/ki0l4
link.plrm.zone
Get Mech Arena
Download the game and send me a Friend invite!
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Ioannis Tsirkas @ioannistsirkas.bsky.social · 21/11/2025
It was great to be part of this collaboration, I always admired Prof Maya Schuldiner's and Dr Ofir Klein's work. lnkd.in/dfabHSkx For the original papers developing the fluorescent scFvs technology in yeast: lnkd.in/d_KZ8WMK lnkd.in/dxt9MD6d
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Reposted by Ioannis Tsirkas
Wiep Klaas Smits (ExpBac/CMAT) @smitslab.bsky.social · 04/08/2025
DNA replication initiation timing is important for maintaining genome integrity | Journal of Bacteriology journals.asm.org/doi/10.1128/...
journals.asm.org
DNA replication initiation timing is important for maintaining genome integrity | Journal of Bacteriology
The regulation of DNA replication is fundamental to cell growth and cell cycle control. In eukaryotes, under-initiation or over-initiation leads to genome instability. In bacteria, it is unclear how c...
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Reposted by Ioannis Tsirkas
Hamperl Lab @hamperllab.bsky.social · 04/08/2025
Such a nice review for one of our latest research works!
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Ioannis Tsirkas @ioannistsirkas.bsky.social · 04/08/2025
We look forward to the community's feedback!
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Mother Jones @motherjones.com · 02/08/2025
The BLS did exactly what it's supposed to do: provide accurate, nonpartisan data. When the numbers showed Trump's "economic boom" was actually a bust (33k jobs vs claimed 291k), he fired the messenger. After all, when it rains too much, true leaders fire the meteorologists.
motherjones.com
We’re officially in Donald Trump’s mad king era
All the books that are fit to cook.
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MwahahahahahadScientist @mads100tist.bsky.social · 19/07/2025
I don't like the person I become when designing primers
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Jop Kind @jopkind.bsky.social · 10/07/2025
I am very excited to share our latest work where we describe a new method to profile genome-wide chromatin transitions over time in single cells. Great collaborative effort with the van Oudenaarden group @hubrechtinstitute.bsky.social @oncodeinstitute.bsky.social www.nature.com/articles/s41....
nature.com
Retrospective and multifactorial single-cell profiling reveals sequential chromatin reorganization during X inactivation - Nature Cell Biology
Kefalopoulou, Rullens et al. develop Dam&ChIC to assay chromatin state at two different time points in the same cell. The method was used to study the reorganization of LADs during cell division a...
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bioRxiv Cell Biology @biorxiv-cellbio.bsky.social · 15/07/2025
RIF1 orchestrates a multi-step restoration of post-replicative H3K9me3 www.biorxiv.org/content/10.1101/202…
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ME Torres-Padilla @metorrespadilla.bsky.social · 15/07/2025
🎤 Apply to speak @our TALENT FORUM by July 31! Showcase YOUR research in Epigenetics & NucleicAcids @www.helmholtz-munich.de & connect with leading scientists 🧳Travel+accommodation covered if selected! 📝 Info+how to apply: lnkd.in/drkRvz7N #postdoc #career #groupleader #HelmholtzMunich #research
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Ioannis Tsirkas @ioannistsirkas.bsky.social · 19/06/2025
Great week for #manga readers! #WildStrawberry ch45 #Yattara ch18 #DramaQueen ch23 #Centuria ch56 #Dandadan ch198 #Chainsawman ch206 #Bugego ch10 #MärchenCrown ch11 #TheGodofTime ch5 #AsurasVerdict ch14 Especially the last one was so good! Here are a few artworks.
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bioRxiv Cell Biology @biorxiv-cellbio.bsky.social · 16/06/2025
A Multimodal Adaptive Optical Microscope For In Vivo Imaging from Molecules to Organisms www.biorxiv.org/content/10.1101/202…
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Ioannis Tsirkas @ioannistsirkas.bsky.social · 13/06/2025
#spoileralert #WildStrawberrt #Manga with itdld best double spread. Too sad this is getting axed ;(
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puckknipscheer.bsky.social @puckknipscheer.bsky.social · 13/06/2025
Excited our paper is out! G-quadruplex (G4) unwinding via an intricate G-loop assembly and disassembly mechanism maintains genome integrity. Pioneered by Koichi Sato with great collaborators Jing Lyu and @simonelsasser.bsky.social Check it out: www.science.org/doi/10.1126/science.adr0493 🧵(1/4)
science.org
RNA transcripts regulate G-quadruplex landscapes through G-loop formation
G-quadruplexes (G4s) are prevalent DNA structures that regulate transcription but also threaten genome stability. How G4 dynamics are controlled remains poorly understood. Here, we report that RNA tra...
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Ioannis Tsirkas @ioannistsirkas.bsky.social · 09/06/2025
#spoileralert #dandadan #manga nailed it this time, one of its coolest #artworks! Remember, this is a weekly #manga!
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Ioannis Tsirkas @ioannistsirkas.bsky.social · 09/06/2025
www.nature.com/articles/s41... POPtag is officially my new favourite named tag! BTW, nice work!
nature.com
The material properties of a bacterial-derived biomolecular condensate tune biological function in natural and synthetic systems - Nature Communications
“Intracellular phase separation is emerging as a universal principle for organizing biochemical reactions in time and space. Here the authors show that PopZ condensate dynamics support cell division a...
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Ioannis Tsirkas @ioannistsirkas.bsky.social · 08/06/2025
This was a gift from a colleague, and it looks breathtaking. Done within one day (1000 pieces, around 12-15 hours)
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spottingthespot.bsky.social @spottingthespot.bsky.social · 27/05/2025
A rather remarkable retraction for a paper where apparently no authors contributed! I guess these #papermill authors were a bit too honest... #fraud @elsevierconnect.bsky.social doi.org/10.1016/j.ij...
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Andrew Deans @genomestability.bsky.social · 26/05/2025
CST complex blocks end resection by BLM-DNA2 or EXO1, therefore promoting non-homologous endjoining and inhibiting repair templated DNA repair. www.science.org/doi/10.1126/...
science.org
CTC1-STN1-TEN1 controls DNA break repair pathway choice via DNA end resection blockade
Antagonistic activities of the 53BP1 axis and the tumor suppressor BRCA1-BARD1 determine whether DNA double-strand breaks (DSBs) are repaired by end joining or homologous recombination. We show that t...
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Andreas Panagopoulos @apanagopoulos.bsky.social · 21/05/2025
Delighted to share that the results of my main postdoc project are now published in @nature.com 🔗 doi.org/10.1038/s415...
doi.org
Multigenerational cell tracking of DNA replication and heritable DNA damage - Nature
A 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...
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Helmholtz Munich @helmholtzmunich.bsky.social · 14/05/2025
Grab a pint & dive into science! 🍻 Pint of Science is back in Munich: 🗓️ May 19–21, 2025 🕢 19:30–22:00 #HelmholtzMunich researchers share big ideas – from AI to antibodies. 🎟️ Info & tickets: t1p.de/lvpuv #pint25 #pint25de
pintofscience.de
Pint of Science Munich
Explore Pint of Science Deutschland events in Munich
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Ioannis Tsirkas @ioannistsirkas.bsky.social · 12/05/2025
Spoiler alert! #Dandadan #manga #194 does not disappoint this Monday too! Back2back peak chapters!
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Alessandra Brambati @alebrambati.bsky.social · 12/05/2025
Excited to share our latest from my postdoc at @mskcancercenter.bsky.social in the Sfeir Lab, in collaboration with the Simon Powell Lab! We uncovered a novel genome repair mechanism in human cells: RNA-templated DNA double-strand break repair (RT-DSBR). (1/5)
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Kat Abughazaleh @katmabu.bsky.social · 07/05/2025
I used to have nightmares about getting a pet and forgetting to feed it. I have not had a single one of those dreams since getting Heater because there is not a chance in Hell she will let me forget breakfast.
Heater, laying in bed, patiently waiting for breakfast.
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Crystal Rogers, PhD @rogerslabucd.bsky.social · 07/05/2025
I just woke up from a nightmare where I was giving a guest lecture to an undergrad cell biology class and none of them knew the central dogma or what DNA or RNA were. I spent an hour teaching that instead. They didn’t understand why they needed to know about DNA for cell biology. 🫠😫😱
media.tenor.com
homer simpson is laying in bed under a blue blanket .
Alt: homer simpson is laying in bed under a blue blanket waking up from a nightmare
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Rebecca Ann Jones @rebannjones.bsky.social · 06/05/2025
What governs where DNA replication begins in human cells? Here, we show that origins of replication in human DNA are epigenetically specified and that crucially, this epigenetic mark is required for both DNA replication and cell proliferation! @narjournal.bsky.social academic.oup.com/nar/article/...
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bioRxiv Cell Biology @biorxiv-cellbio.bsky.social · 07/05/2025
Fluorescence recovery in the Super-Resolution regime reveals subcompartments of 53BP1 foci www.biorxiv.org/content/10.1101/202…
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