Jan Huertas
@janhuemar.bsky.social
110 followers 180 following 10 posts
Postdoc at the Collepardo Lab. Understanding chromatin using simulations. I never read the abstract because I don't like spoilers.
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janhuemar.bsky.social
Exciting new preprint alert! 🚨 The Collepardo lab, teaming up with Huabin Zhou and the Rosen lab we took a deep, high-resolution look into chromatin condensates! [1/6] #Chromatin #MD @rcollepardo.bsky.social @juliamaristany.bsky.social
www.biorxiv.org/content/10.1...
www.biorxiv.org
Reposted by Jan Huertas
gerlichlab.bsky.social
1/ New preprint alert!
In collaboration between the Rosen, Redding, Collepardo-Guevara & Gerlich labs, we uncover a surprising principle of chromosome organisation: electrostatic repulsion positions centromeres at the chromosome surface during mitosis.
🔗 doi.org/10.1101/2025...
An electrostatic repulsion model of centromere organisation
During cell division, chromosomes reorganise into compact bodies in which centromeres localise precisely at the chromatin surface to enable kinetochore-microtubule interactions essential for genome se...
doi.org
Reposted by Jan Huertas
juliamaristany.bsky.social
🚨 New paper out in Nature Comms!

From the Rosen, Redding and Collepardo Labs, we uncover how #nucleosome spacing fine-tunes the architecture of #chromatin condensates.

👇 A short thread on how physical #genome organization emerges from molecular interactions:

www.nature.com/articles/s41...
Nucleosome spacing can fine-tune higher-order chromatin assembly - Nature Communications
Internucleosomal linker length alters the stability and dynamics of chromatin condensates by shifting the balance between inter- and intramolecular interactions. Further, by changing the linker length...
www.nature.com
Reposted by Jan Huertas
fnucleosome.bsky.social
🌱Join us for the first #FragileNucleosome seminar of this spring! We are excited to host @juliamaristany.bsky.social & @chribue.bsky.social this week!
If you have registered before you can join from the same link, if not, don't forget to register!
us06web.zoom.us/webinar/regi...
janhuemar.bsky.social
Excited to share our newest collaboration with @kazu-maeshima.bsky.social and @masaashimazoe.bsky.social, where we show that H1 acts as a liquid-like glue in chromatin.
Go check the paper on the biorXiv!
kazu-maeshima.bsky.social
Our new preprint is out@bioRxiv: www.biorxiv.org/content/10.1...
@masaashimazoe.bsky.social et al. reveal that linker histone H1 acts as a liquid-like glue to organize chromatin in living cells. 🎉 Fantastic collab with @rcollepardo.bsky.social @janhuemar.bsky.social and others—huge thanks! 🙌 1/
janhuemar.bsky.social
Are you in #BPS2025?

Come to join us at the MGO Symposium this afternoon!
rcollepardo.bsky.social
Who's going to #BPS2025?

Please join us at the MGO Symposium @mgo-bps.bsky.social on Saturday 1:30 pm Room 511ABC

Featuring experiments, simulations, and all the scales by
@serenasanulli.bsky.social @melikel.bsky.social
@maristizabal.bsky.social @janhuemar.bsky.social and more

Please repost! 🚀✨
Reposted by Jan Huertas
rcollepardo.bsky.social
Who's going to #BPS2025?

Please join us at the MGO Symposium @mgo-bps.bsky.social on Saturday 1:30 pm Room 511ABC

Featuring experiments, simulations, and all the scales by
@serenasanulli.bsky.social @melikel.bsky.social
@maristizabal.bsky.social @janhuemar.bsky.social and more

Please repost! 🚀✨
janhuemar.bsky.social
Thanks a lot Srinjan!
janhuemar.bsky.social
[6/6] Our work bridges molecular structure, mesoscale organization, and phase separation in chromatin condensates. I only highlighted the simulations results, but there is a lot more! Go read the preprint for the full story: www.biorxiv.org/content/10.1...
www.biorxiv.org
janhuemar.bsky.social
[5/6] Here we saw that 25 bp chromatin builds inter-fiber networks with abundant, strong intermolecular interactions leading to stable condensates, whereas in the 30bp, the tails are mainly forming intra-fiber contacts, making intermolecular contacts weaker.
janhuemar.bsky.social
[4/6] Moreover, using a combination of the experimental data and our minimal model, we were able to get a high resolution reconstruction of an interaction cluster with all the nucleosome tails!
janhuemar.bsky.social
[3/6] Our simulations allowed us to explore the different chromatin structures:
The 25 bp chromatin forms flexible, heterogeneous structures with diverse tail interactions, whereas the 30 bp chromatin favors compact, rigid (and very ordered) stacking with lots of inter-nucleosome contacts
janhuemar.bsky.social
[2/6] How’d we do it? High-resolution cryo-ET captured chromatin condensates at nanometer detail, while simulations brought the histone tails and nucleosome dynamics to life. Together, these tools showed how molecular interactions drive mesoscale chromatin behavior.
janhuemar.bsky.social
Exciting new preprint alert! 🚨 The Collepardo lab, teaming up with Huabin Zhou and the Rosen lab we took a deep, high-resolution look into chromatin condensates! [1/6] #Chromatin #MD @rcollepardo.bsky.social @juliamaristany.bsky.social
www.biorxiv.org/content/10.1...
www.biorxiv.org
Reposted by Jan Huertas
mgo-bps.bsky.social
The Multiscale Genome Organisation is now on Bluesky!

Our first post is to announce our next webinar. Join us next week on Tuesday, Jan. 28th at 12:00 E.T. for two exciting talks by Pablo Dans and @gfudenberg.bsky.social
See you all there!

Link:
mit.zoom.us/j/91715298970
BPS Multiscale Genome Organization Webinar
Jan. 28th, 2025 @ 12-1 PM ET
Pablo Dans, PhD University of the Republic
Geoff Fudenberg, PhD University of Southern California
Reposted by Jan Huertas
rcollepardo.bsky.social
Happy holidays from the Collepardo group ♥️
janhuemar.bsky.social
Excited to be a part of this story!!! Check out our new manuscript exploring how linker DNA length controls chromatin's ability to phase separate
rcollepardo.bsky.social
Is chromatin ordered or disordered? It all depends on the linker DNA length.

Check our latest work with Mike Rosen and Sy Redding. We explore how changes in linker DNA length (as small as 1 bp) fine-tune chromatin structure, between order and disorder, and the properties of chromatin droplets
Reposted by Jan Huertas
rcollepardo.bsky.social
Is chromatin ordered or disordered? It all depends on the linker DNA length.

Check our latest work with Mike Rosen and Sy Redding. We explore how changes in linker DNA length (as small as 1 bp) fine-tune chromatin structure, between order and disorder, and the properties of chromatin droplets