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George Pobegalov

@thelastegor

PostDoc in Molodtsov Lab The Francis Crick Institute, London Optical tweezers, single-molecule fluorescence microscopy SMC complexes, DNA repair, CRISPR

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28.11.2024
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Latest posts by George Pobegalov @thelastegor

Very interesting work!

04.02.2026 21:57 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I’m very pleased to share our work looking at what controls condensin II cell-cycle dependant activity; a great collaboration with @eugenekimlab.bsky.social, @damlatetiker.bsky.social, Kyle Muir and Kumiko Samejima
www.biorxiv.org/content/10.6...

04.02.2026 15:57 πŸ‘ 28 πŸ” 12 πŸ’¬ 2 πŸ“Œ 0
Visual advertisement providing details for the 2026 Single Molecule Approaches to Biology GRS in Les Diablerets, Switzerland in June 27-28, 2026. Two-day event for early-career single-molecule biophysicists, with a keynote session, 12 selected talks, 2 poster sessions, and mentorship component. For more information contact Alba or Quentin or see the official GRS website.

Visual advertisement providing details for the 2026 Single Molecule Approaches to Biology GRS in Les Diablerets, Switzerland in June 27-28, 2026. Two-day event for early-career single-molecule biophysicists, with a keynote session, 12 selected talks, 2 poster sessions, and mentorship component. For more information contact Alba or Quentin or see the official GRS website.

πŸ”¬ Calling all early-career researchers (ECRs) for the GRS Single Molecule Approaches to Biology!

🌎 Location: Les Diablerets, Switzerland

πŸ“† Save the date: June 27-28, 2026

πŸ”— More information: www.grc.org/single-molec...

#biology #biophysics #single-molecule #microscopy #ECR

22.01.2026 15:18 πŸ‘ 5 πŸ” 6 πŸ’¬ 1 πŸ“Œ 2
Preview
Cohesin drives chromatin scanning during the RAD51-mediated homology search Cohesin folds genomes into chromatin loops, the roles of which are under debate. We found that double-strand breaks (DSBs) induce de novo formation of chromatin loops in human cells, with the loop bas...

Thrilled to share that my postdoc research is published today in @science.org! We found that DNA repair uses cohesin complexes to build new chromatin loops that guide the homology search and boost accurate repair! 1/n
www.science.org/doi/10.1126/...

04.12.2025 21:50 πŸ‘ 133 πŸ” 41 πŸ’¬ 3 πŸ“Œ 4
Preview
Cohesin guides homology search during DNA repair using loops and sister chromatid linkages Accurate repair of DNA double-strand breaks (DSBs) is essential for genome stability, and defective repair underlies diseases such as cancer. Homologous recombination uses an intact homologous sequenc...

I am happy to share that my postdoctoral work in the @gerlichlab.bsky.social at @imbavienna.bsky.social is finally out πŸŽ‰!
Our study reveals how cohesin guides focused and accurate homology search.
Read more πŸ‘‰ www.science.org/doi/10.1126/...
Follow along for key insights and updates! 🧡

04.12.2025 20:17 πŸ‘ 110 πŸ” 43 πŸ’¬ 2 πŸ“Œ 4

Super excited to share that our paper is now out in @science.org. Lots of work, but also lots of fun getting this out.
Be sure to check it out!
www.science.org/doi/10.1126/...
Also, follow:
@huabin-zhou.bsky.social @juliamaristany.bsky.social @kieran-russell.bsky.social @rcollepardo.bsky.social

04.12.2025 22:15 πŸ‘ 46 πŸ” 11 πŸ’¬ 0 πŸ“Œ 2
Preview
The SMC Hinge is a Selective Gate for Obstacle Bypass - Nature Communications SMC complexes are ring-shaped motors that fold DNA by extruding loops, but how they navigate large DNA obstacles is unclear. Here, Liu et al., show that SMC complexes bypass obstacles by threading obs...

Glad to see this out after a rather interesting review/publication process!

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

25.11.2025 14:39 πŸ‘ 9 πŸ” 3 πŸ’¬ 2 πŸ“Œ 0
Postdoctoral Fellow - H Yardimci Lab

We are recruiting a postdoctoral fellow to study mechanisms of DNA replication stress using single-molecule imaging tools. If you are excited about microscopy, replisome dynamics, and genome stability, we’d love to hear from you.

Application deadline: 24 December

www.crick.ac.uk/careers-stud...

25.11.2025 11:55 πŸ‘ 31 πŸ” 26 πŸ’¬ 0 πŸ“Œ 0

Super cute! Congratulations, Erin! ☺️

07.11.2025 21:33 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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‼️ Excited to share our new paper out now in @science.org ‼️

We describe a new tetrameric RAD51 paralog complex – XRCC3-RAD51C-RAD51D-XRCC2 – which caps the end of RAD51 filaments.

Link: www.science.org/doi/epdf/10....

Thread ⬇️ (1/8)

07.11.2025 10:15 πŸ‘ 79 πŸ” 19 πŸ’¬ 1 πŸ“Œ 2
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How do SMC complexes load onto DNA to get ready for loop extrusion?

@roisnehamelinf.bsky.social & co discovered that Wadjet, an SMC complex involved in bacterial DNA immunity, performs some impressive molecular gymnastics πŸ€Έβ€β™‚οΈπŸ€Έβ€β™‚οΈπŸ€Έβ€β™‚οΈ.

Check out the new paper: www.cell.com/molecular-ce...

09.10.2025 14:43 πŸ‘ 96 πŸ” 42 πŸ’¬ 3 πŸ“Œ 7
Preview
DNA’s double act: how genetic copies stick together during replication Two leading DNA researchers have come together to confirm long-standing theories and uncover surprising new insights into how life’s code is copied and held together.

A diverse team of Crick researchers has come together to make some surprising new insights into how copies of DNA are held together by the ring-shaped protein complex cohesin during the replication process.

www.crick.ac.uk/news/2025-09...

16.09.2025 15:11 πŸ‘ 5 πŸ” 3 πŸ’¬ 2 πŸ“Œ 0

Our Wadjet-II paper by @roisnehamelinf.bsky.social is out in polished form: www.cell.com/structure/fu...

With a great preview by @kevincorbett.bsky.social & @amardeeep.bsky.social highlighting the potential of Wadjets:

Wadjetβ€”Keeping a watchful eye on circular DNA.

www.cell.com/structure/fu...

05.09.2025 06:29 πŸ‘ 48 πŸ” 19 πŸ’¬ 1 πŸ“Œ 1

Our paper is now out in Molecular Cell!

Check the thread in this former post:

www.cell.com/molecular-ce...

17.07.2025 17:41 πŸ‘ 55 πŸ” 28 πŸ’¬ 5 πŸ“Œ 1

I'm very pleased to share this work, which discovers a new material property of DNAβ€”the bending frictionβ€” in essence how "sticky or viscous" DNA is as it bends & loops due to all the complex molecular interactions within itself & water

@imperialcollegeldn.bsky.social
@crick.ac.uk
@ucl.ac.uk
βš›οΈπŸ§ͺ

16.07.2025 23:56 πŸ‘ 17 πŸ” 3 πŸ’¬ 1 πŸ“Œ 0

A new material constant of DNA is the major determinant of looping dynamics https://www.biorxiv.org/content/10.1101/2025.07.10.664086v1

16.07.2025 21:48 πŸ‘ 5 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
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We found a new asymmetry in the large-scale chromosome structure: sister chromatids are systematically shifted by hundreds of kb in the 5β€²β†’3β€² direction of their inherited strands! The work was led by Flavia Corsi, in close collaboration with the Daniel Gerlich lab.
www.biorxiv.org/content/10.1...
1/

15.07.2025 08:11 πŸ‘ 115 πŸ” 59 πŸ’¬ 3 πŸ“Œ 7
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I’m excited to announce that my paper describing non-canonical mitotic mechanisms in the early mouse embryo is out in @science.org ! (link at end of 🧡)

23.05.2025 19:56 πŸ‘ 197 πŸ” 46 πŸ’¬ 8 πŸ“Œ 1
Rules of Engagement
Rules of Engagement YouTube video by Johan Gibcus

Earnshaw, Goloborodko, Dekker & Mirny labs are excited to present our latest work, "Rules of engagement for condensins and cohesins guide mitotic chromosome formation" - now accepted!!
www.science.org/doi/10.1126/...
A short clip describing the key results:
www.youtube.com/watch?v=pmvO...

11.04.2025 07:45 πŸ‘ 98 πŸ” 53 πŸ’¬ 7 πŸ“Œ 6

Very pleased to share our new story on SMC complexes, a great team effort from @roisnehamelinf.bsky.social, @taschner.bsky.social in the GruberLab and James of @dnatopologylab.bsky.social We find that SMC hinge domains are ssDNA gates to facilitate obstacle bypass during DNA loop extrusion!

18.03.2025 08:03 πŸ‘ 15 πŸ” 5 πŸ’¬ 2 πŸ“Œ 0
Side view of the structure of a monomer of type II Wadjet.

Side view of the structure of a monomer of type II Wadjet.

Happy to share the beautiful structure of a Wadjet SMC complex by @roisnehamelinf.bsky.social, with support from the DCI and @drhonsworth.bsky.social ! This is a type II Wadjet with unique characteristics including a tandem KITE subunit, distinct coiled coil architecture and a deviant hinge.

11.03.2025 09:22 πŸ‘ 95 πŸ” 33 πŸ’¬ 1 πŸ“Œ 2
Yardimci Lab | Single-molecule visualisation of the eukaryotic replication machinery

A new PhD position is available in my lab to explore DNA replication mechanisms using single-molecule approaches. Apply by 19th of March:

www.crick.ac.uk/careers-stud...

04.03.2025 11:39 πŸ‘ 9 πŸ” 14 πŸ’¬ 0 πŸ“Œ 0
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Developing Imaging Solutions to Study the Dynamics of Human Condensin I at University of Sheffield on FindAPhD.com PhD Project - Developing Imaging Solutions to Study the Dynamics of Human Condensin I at University of Sheffield, listed on FindAPhD.com

For anyone that was too busy at the end of last year to think about PhDs or are still looking for the right project/place, I have a project available in the second round of the Yorkshire Biosciences DTP scheme looking at the dynamics of human condensin:
www.findaphd.com/phds/project...

03.02.2025 13:52 πŸ‘ 5 πŸ” 9 πŸ’¬ 1 πŸ“Œ 0
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Force-transducing molecular ensembles at growing microtubule tips control mitotic spindle size - Nature Communications Forces that lead to stable bipolar organization of mitotic spindles are poorly understood. Here the authors show that growing interpolar microtubules make a unique contribution to the overall force ba...

Congratulations to @mmlab.bsky.social and team, who using the C-Trap, were able to grow microtubules from beads in solution and show that HSET (kinesin-14 family) with microtubule tip-tracking protein can harness forces generated by growing microtubule tips: www.nature.com/articles/s41...

12.02.2025 15:43 πŸ‘ 4 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

Why do different DNA molecules occupy different places in the nucleus? What drives chromatin compartmentalisation? Read this amazing paper to find out www.science.org/doi/10.1126/...
Many congratulations to all the authors of this brilliant work! @rkoszul.bsky.social

07.02.2025 07:18 πŸ‘ 16 πŸ” 5 πŸ’¬ 0 πŸ“Œ 0
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Exciting news πŸ“ƒπŸ§¬πŸ”¬

Today we report on the dynamics of a fascinating class of molecular motors, so-called SMC proteins in @cp-cell.bsky.social

doi.org/10.1016/j.ce...

16.01.2025 16:24 πŸ‘ 41 πŸ” 13 πŸ’¬ 1 πŸ“Œ 1

Come and do your PhD with us @TheCrick and @UCL_IPLS starting October 2025. Apply here: www.ucl.ac.uk/epsrc-doctor...

20.12.2024 14:29 πŸ‘ 2 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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We measured forces generated in bipolar spindles replacing spindle poles with optical traps!
Read more here: www.nature.com/articles/s41...

17.12.2024 10:45 πŸ‘ 2 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
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Developing Imaging Solutions to Study the Dynamics of Human Condensin I at University of Sheffield on FindAPhD.com PhD Project - Developing Imaging Solutions to Study the Dynamics of Human Condensin I at University of Sheffield, listed on FindAPhD.com

Please share: Still plenty of time to apply for PhD projects in my lab using single-molecule methods to look at disordered regions and condensin complexes!
Contact me at e.cutts@sheffield.ac.uk
For details on how to apply: www.findaphd.com/phds/project...

16.12.2024 15:37 πŸ‘ 13 πŸ” 14 πŸ’¬ 1 πŸ“Œ 0

πŸ‘€SMC πŸ›΅ on 🧬 induce πŸ₯¨ at each➰
www.science.org/doi/10.1126/...
by @ceesdekker.bsky.social @romanbarth.bsky.social et al.

13.12.2024 20:54 πŸ‘ 29 πŸ” 4 πŸ’¬ 1 πŸ“Œ 0