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Posts by Kumar Somyajit & Lab

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📣 New meeting on RAD51 biology!
🌐 lnkd.in/eyV8dY_S

🔬 🧬 Come explore the latest discoveries on RAD51 biology, and its central roles in DNA repair, replication, and meiosis.

✨ Fantastic invited speakers and ample opportunities for oral presentations.

4 days ago 3 3 0 0
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Another great opportunity for genome integrity / replication stress aficionados to attend two excellent seminars with a simple click. Join us in a few days (Tue April 7th)! 👇

2 weeks ago 14 10 0 1
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Androgen activity in the male embryonic hindbrain drives lethal PFA ependymoma - Nature Androgen activity in the male embryonic hindbrain prolongs hindbrain differentiation in male individuals and drives sex differences in the incidence and prognosis of posterior fossa type A (PFA) ependymoma, an aggressive childhood brain tumour.

Nature research paper: Androgen activity in the male embryonic hindbrain drives lethal PFA ependymoma

go.nature.com/4t2SpS5

3 weeks ago 18 4 3 0
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“I think it’s a real mistake to forget where the pipeline for all this begins.”

John Diffley reflects on the importance of basic research, his mission to decode DNA replication and recreate it in the lab, and the scientific optimism of the 1960s that helped shape it.
www.crick.ac.uk/news/2026-03...

4 weeks ago 81 37 3 5
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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.

A study published in Nature has identified a new mechanism that controls DNA’s ability to replicate – and thereby a cell’s ability to divide. A protein, PAF15, acts as the brake, preventing the replication machinery from becoming overloaded and protecting cells from replication catastrophe. 🧪

1 month ago 12 3 0 0
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Another great science appointment is coming up with @centromellone.bsky.social, Michele Pagano and Gergely Róna!
Join us live on Tuesday, March 3rd at 5pm (Rome) / 11am (NYC).
Zoom link: uniroma1.zoom.us/j/95149984403
Register here to stay in the loop: docs.google.com/forms/d/e/1F...

1 month ago 8 5 0 1

Indeed, your work is so interesting and we are very much keen on exploring p15-911. Will keep you posted. Thank you.

2 months ago 1 1 1 0

Can't thank enough @lundbeckfonden.bsky.social, @erc.europa.eu, @novo-nordisk.bsky.social, @cancer.dk for believing in us and supporting our research.

Department of Biochemistry and Molecular Biology, University of Southern Denmark @sdu.dk

We hope you enjoy reading this story. 🙏🙏🙏

2 months ago 0 0 0 0
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This would not have been possible without the exceptional generosity and expertise of outstanding collaborators Nataliya Petryk, Narcis-Adrian Petriman, Jens Andersen, @jespergrud.bsky.social , @hanasedlackova.bsky.social, Ole Nørregaard Jensen, @ravnskjaer-lab.bsky.social, Jonathan Brewer. 🙏🙏🙏

2 months ago 2 0 1 0

The work was spearheaded by the supremely talented PhD student Gita Chhetri, and the wholehearted, indispensable contributions of the entire lab.

2 months ago 0 0 1 0
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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.

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

2 months ago 54 21 4 1
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Cells' built-in capacity limit for copying DNA could impact cancer treatment For almost 60 years, scientists have tried to understand why DNA doesn't replicate wildly and uncontrollably every time a cell divides, which happens constantly.

Cells possess a built-in limit for DNA replication, controlled by the protein PAF15, which may offer a new approach to targeting rapidly dividing cancer cells.

2 months ago 1 1 0 0
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Deep contrastive learning enables genome-wide virtual screening Recent breakthroughs in protein structure prediction have opened new avenues for genome-wide drug discovery, yet existing virtual screening methods remain computationally prohibitive. We present DrugC...

@science.org Deep contrastive learning enables genome-wide virtual screening | Science www.science.org/doi/10.1126/...

3 months ago 37 14 0 0
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🌍Open call: Junior Group Leader positions!

Join a world-class biomedical research institute at the heart of the Vienna BioCenter, where curiosity drives discovery.

Lead your own lab, pursue bold ideas, and shape the future of science at the IMP: www.imp.ac.at/career/open-...

5 months ago 95 84 1 7
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Repair of DNA double-strand breaks leaves heritable impairment to genome function Upon DNA breakage, a genomic locus undergoes alterations in three-dimensional chromatin architecture to facilitate signaling and repair. Although cells possess mechanisms to repair damaged DNA, it is ...

𝗖𝗮𝗻 𝗰𝗲𝗹𝗹𝘀 𝗲𝘃𝗲𝗿 𝘁𝗿𝘂𝗹𝘆 𝗿𝗲𝗰𝗼𝘃𝗲𝗿 𝗳𝗿𝗼𝗺 𝗗𝗡𝗔 𝗱𝗮𝗺𝗮𝗴𝗲?Excited to share our new study “Repair of DNA double-strand breaks leaves heritable impairment to genome function”, revealing DNA repair’s hidden cost, out now @science.org tinyurl.com/5n6zw3ye. Led by @sbantele.bsky.social and Jiri Lukas.🧵👇1/n

5 months ago 124 51 11 6

Many many congratulations Susi!!! Wow!! Exciting to see this out! Such a great work!!👏👏👏👏

5 months ago 2 0 1 0
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Structural basis of T-loop–independent recognition and activation of CDKs by the CDK-activating kinase Cyclin-dependent kinases (CDKs) are prototypical regulators of the cell cycle. The CDK-activating kinase (CAK) acts as a master regulator of CDK activity by catalyzing the activating phosphorylation o...

Now out in Science! Cyclin-dependent kinases (CDKs) are key regulators of the cell cycle. In @vcushing.bsky.social's magnum opus, we use #cryoEM to figure out how the CDK-activating kinase recognises CDKs to fully activate them - a key step in cell cycle control.
www.science.org/doi/10.1126/...

6 months ago 178 56 9 5

Wonderful news! Many congratulations!!!

6 months ago 1 0 0 0

9 days to go:
* 2 x open positions!
* Exceptional environment, competitive start-up package
* University of Toronto appointments
* Toronto has great (and peaceful) quality of life!

6 months ago 15 31 0 1
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Description Please note that job descriptions are not exhaustive, and you may be asked to take on additional duties that align with the key responsibilities ment...

@mariasecrier.bsky.social & I are looking for an enthusiastic & excellent data scientist for a 4-year postdoc to understand cell cycle dysregulation in cancer.

Deadline 15th October. Get in touch if you have any questions.

Please repost!

More details:
www.imperial.ac.uk/jobs/search-...

7 months ago 31 34 0 3
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DNA2 enables growth by restricting recombination-restarted replication - Nature DNA2 suppresses recombination-restarted replication and checkpoint activation at stalled forks, and its loss triggers recombination-dependent synthesis, checkpoint signalling and cell-cycle exit, high...

My first post on bsky to share our latest research in @nature.com: “DNA2 enables growth by restricting recombination-restarted replication” - defines DNA2’s essential function & elucidates links with primordial dwarfism and cancer. Thanks to the lab, collaborators & @ukri.org @acmedsci.bsky.social

7 months ago 39 19 7 1
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Targeting G1–S-checkpoint-compromised cancers with cyclin A/B RxL inhibitors - Nature Dual cyclin A/B RxL inhibitors selectively kill small cell lung cancer cells and other cancer cells with high E2F activity.

new out in Nature
www.nature.com/articles/s41...

8 months ago 16 8 0 0
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So utterly honoured to have been recruited, mentored and supported by this incredibly influential individual. Long may he happily retire. @gdsc-sussex.bsky.social

8 months ago 18 3 0 0
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Transient APC/C inactivation by mTOR boosts glycolysis during cell cycle entry - Nature APC/C activity is transiently inhibited to generate a pulse of glycolysis that is required for mammalian cell cycle entry.

new out in Nature: cell cycle meets metabolism
www.nature.com/articles/s41...

8 months ago 15 6 0 0
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Tillykke til alle nye SDU-studerende

Den 28. juli er 4.415 blevet tilbudt en studieplads på Syddansk Universitet.

Stort tillykke og husk at takke ja til pladsen senest den 4. august.

Der er fortsat få ledige studiepladser - få et overblik her: ledigepladser.sdu.dk

#studiestart #uddpol

8 months ago 8 2 0 0
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Yadav, Jadhav, @hanasedlackova.bsky.social et al present a novel cell-permeable biotin-HaloTag ligand. The reported ligand expands the HaloTag toolbox by enabling in vivo labeling & providing capabilities for efficient affinity capture of protein variants from live cells rupress.org/jcb/article/...

9 months ago 18 11 1 0
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Nanoscale 3D DNA tracing in non-denatured cells resolves the Cohesin-dependent loop architecture of the genome in situ - Nature Communications A nanoscale 3D DNA tracing workflow visualizes Cohesin-dependent loops in single, structurally well-preserved cells. Computer simulations based on the tracing data give further insight into how Cohesi...

Our new non-denaturing nanoscale 3D DNA tracing technology provides single-cell (and sister-chromatid specific!) readout of chromatin structure with 10kb genomic resolution - Check it out!

www.nature.com/articles/s41...

Congratulations to Kai and Oyvind!!

9 months ago 66 27 1 0
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Spatiotemporal orchestration of mitosis by cyclin-dependent kinase - Nature Experiments in fission yeast show that cyclin-dependent kinase is first activated in the nucleus, from which the mitotic signal is propagated from CDK at the centrosome to the cytoplasm.

new out in Nature, the latest on the cell cycle in fission yeast, lovely basic biology www.nature.com/articles/s41...

9 months ago 9 1 0 0
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Mechanism of cytarabine-induced neurotoxicity - Nature Certain antimetabolites used to treat cancer are more neurotoxic than others, and it is now shown that this is due to their greater tendency to generate DNA double-stranded breaks, whereas less n...

Cytarabine has been the mainstay for AML treatment for over 50 years. This chemotherapy can lead to problems with movement and balance. Here we explain this neurotoxic side-effect. www.nature.com/articles/s41... Work led by Jia-Cheng Liu, Donpeng Wang and Elsa Callen and terrific collaborators!

9 months ago 24 10 0 0
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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...

Delighted to share that the results of my main postdoc project are now published in @nature.com

🔗 doi.org/10.1038/s415...

11 months ago 89 34 8 1