Sign in

Kazuhiro Maeshima

@kazu-maeshima.bsky.social
828 followers 286 following 82 posts

#Chromatin biologist/biophysicist @nigidenken.bsky.social & SOKENDAI in Japan. Chromatin is very dynamic and flexible, but NOT regular!!! 🧪🧬🔬 My career and work: bit.ly/2CuF4L5  Lab HP: bit.ly/3F1a8nk YouTube Seminar: bit.ly/4eOSip7

PostsRepliesMedia
Reposted by Kazuhiro Maeshima
Epigenetics Podcast @epigeneticspod.bsky.social · 28/09/2026
In the most recent episode we speak with @robklose.bsky.social, Professor of Genetics at the University of Oxford, about how CpG islands help control gene expression and chromatin regulation during development. #podcast #epigenetics Listen here: activemotif.com/podcasts-rob...
1156
Kazuhiro Maeshima @kazu-maeshima.bsky.social · 26/09/2026
🧬 Highly related @natgenet.nature.com paper from @binzmit.bsky.social group, using nucleosome-resolution chromatin modeling: Euchromatin forms condensed domains with short active regions on the surface www.nature.com/articles/s41... Congratulations! 🎉
nature.com
Euchromatin forms condensed domains with short active regions on the surface - Nature Genetics
Simulations integrating micro-C and imaging data provide a coherent view of chromatin organization from nucleosomes to clutches to domains, revealing that most regions form compact domains but short r...
24925
Reposted by Kazuhiro Maeshima
Philip Ball @philipcball.bsky.social · 18/09/2026
Oh my god, why is there SO MUCH interesting stuff in gene regulation right now? This is marvellously interesting.
1131
Kazuhiro Maeshima @kazu-maeshima.bsky.social · 18/09/2026
🧬 Our “Behind the Paper” is now online at Nature Communities: “Active chromatin is not simply open—it forms compact domains that cohesin keeps from mixing.” 📖 A short story behind our recent @natgenet.nature.com paper. communities.springernature.com/posts/active... www.nature.com/articles/s41...
04327
Reposted by Kazuhiro Maeshima
Lopes_Lab @lopeslab.bsky.social · 16/09/2026
Thrilled 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.com
Cohesin reshapes replication fork contacts to aid fork slowing and reversal - Nature
Cohesin-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 Kazuhiro Maeshima
Trends in Genetics @cp-trendsgenetics.bsky.social · 14/09/2026
"Mitotic chromosomes: from the chromosome scaffold model to condensins and physical forces" by Kazuhiro Maeshima ( @kazu-maeshima.bsky.social ) & colleagues FREE till Nov 3rd at authors.elsevier.com/a/1nmwrcQbJI...
083
Reposted by Kazuhiro Maeshima
Alex Ludwig @alexludwig.bsky.social · 14/09/2026
Check out our new preprint in which we used cryoCLEM to study the native architecture of the human inactive X chromosome in RPE1 cells. Neil Brockdorff’s group from Oxford posted a similar story, performed in female stem cells. We see individual nucleosomes and other exciting things!
0153
Reposted by Kazuhiro Maeshima
Nature Genetics @natgenet.nature.com · 14/09/2026
📢PUBLISHED @natgenet.nature.com 📰Cohesin prevents local mixing of condensed euchromatic domains in living human cells. By Masa A. Shimazoe, Kazuhiro Maeshima and colleagues. ⬇️ www.nature.com/articles/s41...
nature.com
Cohesin prevents local mixing of condensed euchromatic domains in living human cells - Nature Genetics
Single-nucleosome imaging/tracking and super-resolution three-dimensional structured illumination microscopy within euchromatic regions show that cohesin-mediated loops constrain condensed euchromatic...
0103
Kazuhiro Maeshima @kazu-maeshima.bsky.social · 15/09/2026
How are mitotic chromosomes built? Our Review @cp-trendsgenetics.bsky.social revisits the classical chromosome scaffold model and connects it to condensins, topoIIα, and physical forces. We propose interphase chromatin domains as “building blocks”🧩of chromosomes: authors.elsevier.com/a/1nmwrcQbJI...
12820
Reposted by Kazuhiro Maeshima
Joy Jeongyoon Choi @joyjoychoi.bsky.social · 14/09/2026
Excited to share our new preprint on in situ chromatin structure of the inactive X chromosome in differentiated female mouse embryonic stem cells. www.biorxiv.org/content/10.6... 🧵1/8
611743
Reposted by Kazuhiro Maeshima
Job Dekker @jobdekker.bsky.social · 08/09/2026
Amazing work on how chromatin domains form and remain insulated. Must-read!
1172
Reposted by Kazuhiro Maeshima
Fena Ochs @fenaochs.bsky.social · 10/09/2026
My lab at the Center for Gene Expression (CGEN), University of Copenhagen is looking for a motivated Postdoc interested in cohesin biology, 3D chromatin, and super-resolution microscopy. 📩 Please email your CV and letter of intent to fena.ochs(at)sund.ku.dk.
01822
Reposted by Kazuhiro Maeshima
Masa A. Shimazoe @masaashimazoe.bsky.social · 09/09/2026
Our paper on euchromatin and cohesin is now published!!🙌 Euchromatin forms condensed domains, and cohesin constrains their local mixing. This organization maintains transcriptional insulation. This work was truly a team effort, and I’m grateful to everyone who contributed to it.
0205
Reposted by Kazuhiro Maeshima
Shiori Iida @shiori-iida.bsky.social · 08/09/2026
Happy to share that this paper is now published in Nature Genetics! Grateful to everyone who supported this work throughout this long journey. I’m proud to see it out! www.nature.com/articles/s41...
nature.com
Cohesin prevents local mixing of condensed euchromatic domains in living human cells - Nature Genetics
Single-nucleosome imaging/tracking and super-resolution three-dimensional structured illumination microscopy within euchromatic regions show that cohesin-mediated loops constrain condensed euchromatic...
22612
Kazuhiro Maeshima @kazu-maeshima.bsky.social · 08/09/2026
Is euchromatin really “open”? 🧬 Using super-resolution imaging🔬 our new study @natgenet.nature.com reveals: Euchromatin forms condensed domains in live cells. Cohesin constrains them and prevents domain mixing for proper transcriptional insulation🚧 🔗 www.nature.com/articles/s41... (1/2)
415067
Reposted by Kazuhiro Maeshima
Nature @nature.com · 29/07/2026
Obituary: Susumu Tonegawa (1939-2026) Japan’s first Nobel prizewinner in physiology or medicine go.nature.com/4wty0Yy
go.nature.com
Obituary: Susumu Tonegawa, Japan’s first Nobel prizewinner in physiology or medicine
Fearless molecular biologist who revealed the workings of antibodies and memories.
03114
Reposted by Kazuhiro Maeshima
Max Planck Institute of Biophysics @mpibp.bsky.social · 13/07/2026
How do 2 meters of DNA fit inside a nucleus you can barely see? 🧬 Our new study mapped individual nucleosomes inside human cells.
14315
Reposted by Kazuhiro Maeshima
Jan Philipp Kreysing @jpkreysing.bsky.social · 13/07/2026
Delighted that our story on chromatin architecture inside human cells is now published — the last chapter of my PhD. It was a pleasure working with @sergiocruzleon.bsky.social, @johannesbetz.bsky.social, and everyone involved. #teamtomo www.nature.com/articles/s41...
nature.com
Molecular architecture of heterochromatin at the nuclear periphery of primary human cells - Nature Communications
The 3D organisation of chromatin inside a human cell is still not fully resolved. Here the authors reveal that in situ cryo-ET resolves individual nucleosomes and predicts DNA linkers, thus showing th...
37423
Reposted by Kazuhiro Maeshima
The Picower Institute for Learning and Memory at MIT @picowerinstitute.bsky.social · 15/07/2026
We are heartbroken to have lost our founder, who provided so much inspiration, but we are all honored to carry on the science he loved so much. picower.mit.edu/news/picower... #neuroscience #biology
picower.mit.edu
Picower Professor Susumu Tonegawa, renowned molecular biologist and Nobel laureate, dies at 86
Tonegawa made landmark discoveries about how the immune system generates antibody diversity and how the brain forms memories.
02919
Reposted by Kazuhiro Maeshima
Karolin Luger @nucleosomepolice.bsky.social · 18/05/2026
Out today - structure of the human HIRA histone chaperone complex bound to nucleosomes. Ever wondered how nucleosomes are assembled in the wake of transcription? It takes a 'hulk of a protein complex'. Work by the amazing Wei Tian weetian558.bsky.social. www.biorxiv.org/content/10.6... 🧵
616755
Kazuhiro Maeshima @kazu-maeshima.bsky.social · 07/07/2026
Our new preprint @biorxivpreprint.bsky.social, led by @katsuminami.bsky.social‬ et al.! 🎉 www.biorxiv.org/content/10.6... Machine learning-assisted Repli-Histo labeling and single-nucleosome imaging reveal distinct transcription-dependent chromatin constraints across euchromatin and heterochromatin.
14613
Reposted by Kazuhiro Maeshima
The Francis Crick Institute @crick.ac.uk · 23/03/2026
“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...
39143
Kazuhiro Maeshima @kazu-maeshima.bsky.social · 03/06/2026
My Fragile Nucleosome seminar is now on YouTube www.youtube.com/watch?v=ksXp... I discuss our recent work showing that linker histone H1 behaves as a liquid-like glue for chromatin organization in living human cells 🧬 Paper: www.science.org/doi/full/10.... Huge thanks to @fnucleosome.bsky.social!
youtube.com
Kazuhiro Maeshima
YouTube video by Fragile Nucleosome
1328
Reposted by Kazuhiro Maeshima
Tjian + Darzacq Lab, UC Berkeley @tjiandarzacq.bsky.social · 02/06/2026
Out now in Science! Our study challenges long-standing assumptions about transcription factor specificity in eukaryotes. Novel single-molecule measurements of TF behavior in living cells reveal an independence of locus-specific binding from DNA sequence recognition.🧵 www.science.org/doi/10.1126/...
science.org
Unstructured transcription factor interactions enable emergent specificity
How intrinsically disordered regions (IDRs) shape chromatin binding and nuclear organization of transcription factors (TFs) remains unclear. We used proximity-assisted photoactivation (PAPA), a single...
17835
Reposted by Kazuhiro Maeshima
Wonder of Science @wonderofscience.bsky.social · 03/06/2026
Beautiful view of Earth from space taken from the International Space Station.
24690136
Reposted by Kazuhiro Maeshima
Alessandro Costa @costalaboratory.bsky.social · 28/05/2026
New preprint from our lab! We've been working out how the CMG replicative helicase gets built. 🧵 1/3
2148
Reposted by Kazuhiro Maeshima
SMART Symposia @smartsymposium.bsky.social · 13/05/2026
Announcing SMART Genome Symposium: From Structure to Function ! 📅 October 14–16, 2026 Focus: 3D genome organization | Chromatin dynamics | Computational modeling Register now symposia.smart.org.cn/sym/event/Fu... #SMARTSymposia #SMARTshenzhen #Genome #Genomes #Biophysics
051
Reposted by Kazuhiro Maeshima
Physics of Life Dresden @poldresden.bsky.social · 04/05/2026
👩‍🔬Calling all researchers! Are you interested in working on a project at Physics of Life? 🔬Our new Visitors Program will allow scientists to visit PoL for up to 6 months to pursue an interdisciplinary project, with their travel and accommodation covered. Learn more here and apply: tud.link/nasaw5
01814
Kazuhiro Maeshima @kazu-maeshima.bsky.social · 01/05/2026
Our new preprint! 🧬✨ www.biorxiv.org/cgi/content/... @ynagata.bsky.social et al. combined single-nucleosome imaging with Fucci probes to follow local chromatin behavior during interphase. Local nucleosome motion stays nearly constant from G1 to G2, except in early G1. Thanks to all coauthors!
1246
Kazuhiro Maeshima @kazu-maeshima.bsky.social · 25/04/2026
Exciting work! The authors conclude that condensin-mediated loop formation, Aurora B phosphorylation, and core histone deacetylation are not obligatory factors for mitotic chromosome compaction. Our Mg2+ model is discussed as the “last model standing.” www.cell.com/current-biol...
cell.com
A Transient Rise in Free Mg2+ Ions Released from ATP-Mg Hydrolysis Contributes to Mitotic Chromosome Condensation
How the negatively charged long genomic DNA is organized into mitotic chromosome remains unclear. Using a newly developed Mg2+ indicator, Maeshima et al. demonstrate a transient rise in free Mg2+ rele...
0218
Reposted by Kazuhiro Maeshima
FragileNucleosome @fnucleosome.bsky.social · 20/04/2026
🕛🕔🕗 Heads up! Fragile Nucleosome Seminar is at a special time this week: 2pm US West / 5pm US East / 10pm UK / 6am Tokyo / 7am Melbourne We'll have outstanding talks on chromatin from Shabih Shakeel and @kazu-maeshima.bsky.social !!! register here: us06web.zoom.us/webinar/regi...
0148
Reposted by Kazuhiro Maeshima
Rosana Collepardo @rcollepardo.bsky.social · 15/04/2026
Check out our latest work in collaboration with @kazu-maeshima.bsky.social and @masaashimazoe.bsky.social We show that H1 is a dynamic, multivalent “liquid-like” glue of chromatin in cells: it bridges multiple nucleosomes & exchanges partners frequently to enable both compaction and flexibility
0176
Reposted by Kazuhiro Maeshima
Jan Huertas @janhuemar.bsky.social · 09/04/2026
Our work on the linker histone is now out in Science Advances! We show that H1 behaves as a liquid-like glue that helps organize chromatin in living cells. Very happy to have worked together with @kazu-maeshima.bsky.social and @masaashimazoe.bsky.social
0102
Reposted by Kazuhiro Maeshima
eltsovmikhail.bsky.social @eltsovmikhail.bsky.social · 13/04/2026
I am not afraid to say it: this is the most fundamental advance in our understanding of chromatin structure since the zig-zag fiber model. Congratulations!
152
Reposted by Kazuhiro Maeshima
Masa A. Shimazoe @masaashimazoe.bsky.social · 09/04/2026
My first, first author paper is now on #ScienceAdvances ! Linker histone H1 is a liquid-like "glue" condensing chromatin, which revises textbooks! 📖✨ science.org/doi/10.1126/sc… Huge thanks to @kazu-maeshima.bsky.social , for supervision. Amazing collab with @rcollepardo.bsky.social ’s group! 1/
science.org
53612
Kazuhiro Maeshima @kazu-maeshima.bsky.social · 10/04/2026
Our linker histone H1 paper is featured on the cover of the April 10 issue of #ScienceAdvances. www.science.org/doi/10.1126/... A molecular dynamics simulation of nucleosomes and linker histone H1, with single-H1 trajectories (background). 🎉 Full cover caption: www.science.org/toc/sciadv/1...
02913
Kazuhiro Maeshima @kazu-maeshima.bsky.social · 08/04/2026
Our H1 paper is out #ScienceAdvances: www.science.org/doi/10.1126/... @masaashimazoe.bsky.social et al. reveal that linker histone H1 acts as a liquid-like glue to organize chromatin in live cells. 🎉 Fantastic collab with @rcollepardo.bsky.social @janhuemar.bsky.social and others—huge thanks! 🙌 1/
26430
Reposted by Kazuhiro Maeshima
Karolin Luger @nucleosomepolice.bsky.social · 02/02/2026
Unquestionably the result of combined effort from all current and former lab members, support from colleagues @CSU and @CU, and support from @hhmi-science.bsky.social and NIH over decades. A heartfelt 🙏 to my nominators and of course @vilcekfoundation.bsky.social. vilcek.org/prizes/prize...
vilcek.org
Karolin Luger - Vilcek Foundation
Karolin Luger's research led to the capture of a high resolution image of chromatin, resulting in the development of innovative drug treatments for diseases like cancer.
1413224
Reposted by Kazuhiro Maeshima
Nature @nature.com · 01/03/2026
Older people with exceptional memory have a surprisingly high number of young neurons go.nature.com/4cm8VYB
go.nature.com
Brains of ‘super agers’ are still strong producers of new neurons
Nature - Older people with exceptional memory have a surprisingly high number of young neurons, study finds.
06513
Kazuhiro Maeshima @kazu-maeshima.bsky.social · 19/02/2026
Honored to deliver the 2025/2026 Paul Doty Lecture @harvardmcb.bsky.social Excited to share our single-nucleosome view of chromatin behavior. #chromatin
0122
Kazuhiro Maeshima @kazu-maeshima.bsky.social · 11/02/2026
Fascinating cryo-ET study! 🔬🧬 We can now trace strings of nucleosomes directly in cells. Congratulations to the @eltsovmikhail.bsky.social‬ team! 🎉
0163
Kazuhiro Maeshima @kazu-maeshima.bsky.social · 10/02/2026
My student Aoi Otsuka ’s PhD work is now officially published @csf-jscb.bsky.social! 🔬 Single-nucleosome imaging uncovers biphasic local chromatin dynamics in an oncogene-inducible human carcinogenesis model (1–3 d: same, 5–7 d: ↑, back by week 4). Congrats! www.jstage.jst.go.jp/article/csf/...
02510
Kazuhiro Maeshima @kazu-maeshima.bsky.social · 04/01/2026
Happy New Year! 🎍 Today’s view of Mt. Fuji over Mishima City — @nigidenken.bsky.social is on the right. Wishing you all a wonderful year!
1122
Reposted by Kazuhiro Maeshima
Tadasu Nozaki @tadasu443.bsky.social · 13/11/2025
We’re recruiting PhD students. If you’re interested in chromosome biology or imaging, please apply to the MCB or Plant Biology graduate programs at UMass (deadline is soon, 12/1). DM me for projects or questions. www.umass.edu/molecular-ce... www.umass.edu/plant-biolog...
umass.edu
How to Apply : Molecular & Cellular Biology : UMass Amherst
A bachelor's degree from a qualified college or university is required or expected prior to the program's start date. Applicants are expected to have taken college-level courses in Biology, Organic Ch...
052
Kazuhiro Maeshima @kazu-maeshima.bsky.social · 28/12/2025
So proud of my former PhD student ‪@tadasu443.bsky.social‬ for starting his own lab at @umassamherst.bsky.social ! Wishing him all the best in this exciting new chapter. Looking forward to his future discoveries! 🎉🧬
1144
Kazuhiro Maeshima @kazu-maeshima.bsky.social · 23/12/2025
My PhD students Aoi Otsuka @masaashimazoe.bsky.social et al. published @csf-jscb.bsky.social 🎉 Single-nucleosome imaging in an oncogene-inducible human carcinogenesis model shows biphasic chromatin dynamics (1–3 d same; 5–7 d ↑; back by week 4). Congrats! 👉 doi.org/10.1247/csf....
1178
Reposted by Kazuhiro Maeshima
Rosana Collepardo @rcollepardo.bsky.social · 05/12/2025
Our Science paper is out! Huge congratulations to @huabin-zhou.bsky.social, Mike Rosen, and the brilliant @janhuemar.bsky.social @juliamaristany.bsky.social and @kieran-russell.bsky.social from our group News: bit.ly/4avnkAr and bit.ly/3XBGVHS Great perspective by @vram142.bsky.social +K Zhang
28941
Reposted by Kazuhiro Maeshima
Gerlich Lab @gerlichlab.bsky.social · 05/12/2025
Excited to share our latest fully in-house paper! 🎉 We show how cohesin integrates loop extrusion with sister tethering to guide the homology search during DNA repair. Huge congratulations to all authors, and to @fedeteloni.bsky.social for leading this work 👏 We’re excited to see his next steps!
24213
Kazuhiro Maeshima @kazu-maeshima.bsky.social · 04/12/2025
Exciting paper @natcomms.nature.com from Kanemaki lab @nigidenken.bsky.social Congratulations 👏🎉 nature.com/articles/s41... Using a ligase-depletion OK-seq approach, they map DNA replication initiation zones genome-wide in human cells and identify TRESLIN–MTBP as a key limiting firing factor.
nature.com
Regulated TRESLIN-MTBP loading governs initiation zones and replication timing in human DNA replication - Nature Communications
DNA replication in the human genome occurs preferentially at initiation zones (IZs). Here, the authors identify TRESLIN-MTBP as a limiting factor for replication initiation whose loading onto DNA-boun...
063
Reposted by Kazuhiro Maeshima
Mariko Sasaki @marikosasakiatnig.bsky.social · 27/11/2025
Our recent paper offers insights into unligated Okazaki fragment by the absence of Rad27/FEN-1 leading to severe rDNA copy number changes. doi.org/10.1002/1873...
doi.org
FEBS Press
The budding yeast Rad27 is a structure-specific endonuclease. Here, the authors reveal that Rad27 is crucial for maintaining the stability of the ribosomal RNA gene (rDNA) region. Rad27 deficiency le....
091