Advertisement · 728 × 90

Posts by Axel Delamarre

Preview
Synthetic chromosomes for 3D functional genomics: from principles to AI-guided design The role of genome 3D organization for fundamental chromatin processes, such as long-range promoter-activator regulatory interactions, remains ambiguo…

Happy to share our review of the past, recent, and future applications of synthetic genomics in studying the 3D functional organization of chromosomes, a set of approaches that are gaining momentum!

www.sciencedirect.com/science/arti...

5 days ago 19 14 0 0

Delighted to see our work now published at the EMBO Journal! Check also this concomitant paper by the Bai and Mirny labs with an orthogonal approach that aligns well with our measurements www.nature.com/articles/s41... Great system to study how SMCs facilitate/regulate target search in chromatin!

4 weeks ago 25 15 1 0
Preview
Three-dimensional genome reorganization foreshadows zygotic genome activation in Drosophila - Nature Genetics Pico-C, a low-input Micro-C approach, reveals that dynamic three-dimensional genome folding precedes zygotic genome activation in Drosophila.

Excited to share my PhD work!

The question: How is genome organization established? Here, we developed a low-input Micro-C method, Pico-C, and used it to map chromatin architecture across early stages of fly development.

Here’s a quick Blue-torial 🙂 (1/n)

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

1 month ago 68 24 1 1
Post image

We just published a short conceptual review together with @angela-taddei.bsky.social on the spatial controls of homology search in both bacteria and eukaryotes. We discuss an emerging framework for homology search in cells with two main phases. Check it out: authors.elsevier.com/c/1mjyh,LqAZ...

1 month ago 18 10 2 0

Congrats!

2 months ago 1 0 1 1

New paper alert from the group!! 🚨: DNA flexibility tips the balance between stability and plasticity in nucleosomes

One of the works from my PhD, co-led alongside @nachper.bsky.social, is finally out! Work from @rcollepardo.bsky.social & @janhuemar.bsky.social
⬇️
www.biorxiv.org/content/10.6...
⬆️

2 months ago 12 6 1 2
Preview
A small polymerase ribozyme that can synthesize itself and its complementary strand The emergence of a chemical system capable of self-replication and evolution is a critical event in the origin of life. RNA polymerase ribozymes can replicate RNA, but their large size and structural ...

How could a simple self-replicating system emerge at the origins of life? RNA polymerase ribozymes can replicate RNA, but existing ones are so large that their self-replication seems impossible. Could they be smaller?

Excited to share our latest work in @science.org on a new small polymerase.
1/n

2 months ago 500 210 10 28

Interested in transcriptional regulation, enhancers and 3D genome folding?

In this new study we wondered about the role of cohesin loading at enhancers for long-range transcriptional control

www.biorxiv.org/content/10.6...

detailed 🧵👇

2 months ago 67 33 1 3
Advertisement
Post image

Please join Andreas Ladurner and me for the GRC Chromatin Structure and Function conference to be held near Barcelona Spain from May 31-June 5! We accepting abstracts for posters and talks. The meeting is preceded by an awesome GRS. Learn more in our video below and apply www.grc.org/chromatin-st...

2 months ago 36 16 0 0
Post image

Come on join us! We are searching for the next technical associate to join our lab ~Summer 2026.

This could be a great position for someone who is graduating this spring and is looking for 2 more years of research experience before starting their PhD:
careers.peopleclick.com/careerscp/cl...

2 months ago 17 11 0 1
DNA translocation by the CMG helicase: the helical inchworm model Abstract. In all cells, hexameric helicases drive the unwinding of parental chromosomal DNA at replication forks to provide the single-stranded DNA templates required by replicative DNA polymerases. D...

Happy to share our perspective on the DNA translocation mechanism by the CMG helicase.

DNA translocation by the CMG helicase: the helical inchworm model url: portlandpress.com/biochemsoctr...

2 months ago 16 10 0 1

Yet another reason why butterflies and moths are so interesting! Unlike other studied organisms that organise their DNA into two forms of chromatin, silkworms have a mysterious third form of chromatin folding..

2 months ago 10 3 0 1
Preview
a computer generated image of a dna structure ALT: a computer generated image of a dna structure

Coming soon! PhD opening joint with @drjonbaxter.bsky.social at @gdsc-sussex.bsky.social
Keep a look out and get in touch if you are interested in any and all of: Chromosomes, Genome Stability, Chromatin and DNA Topology in Mitosis and Meiosis.

2 months ago 6 7 0 3
Post image

We are hiring!

2 months ago 24 36 2 3

Please repost and consider applying: we work in such a fantastic context, we ask so interesting questions, and we have such a collegial and best-willing atmosphere… CRBM = Happy & Good Science

2 months ago 10 9 0 0

🚨 New preprint from the lab. Combining modeling and data analysis of SisterC data in yeast, we investigate cohesion of replicated chromosomes and show that sister chromatids are loosely and asymmetrically aligned in G2/M. Check the tweetorial below ⬇️ www.biorxiv.org/content/10.6...

2 months ago 21 6 1 1

Not just yet…
We produce it ourselves and I know @jsoro.bsky.social does that too…

2 months ago 3 0 0 0
Advertisement
DNA methylation and lncRNA control asynchronous DNA replication at specific imprinted gene domains - Nature Communications It is not fully understood why genomic loci show asynchronous DNA replication. Here, the authors show that two imprinted gene domains replicate asynchronously between the parental chromosomes due to d...

🔔 New paper alert 🔔 www.nature.com/articles/s41...
Some regions in the genome replicate early and some late, but the why and how remain poorly understood. DNA replication and 3D genome organization appear linked, raising the question if one may regulate the other? (1/n)

3 months ago 31 15 3 1
CAD-C: An engineered nuclease enables repair-free in situ proximity ligation and nucleosome-resolution chromosome walks in human cells Chromosome conformation capture (3C)-derived methods have become an indispensable tool in the study of gene regulation. The three-dimensional contacts they are able to assay depend strongly on the properties of the enzyme used to fragment chromatin prior to proximity-driven ligation. Micrococcal nuclease (MNase), used in Micro-C, increases resolution at the expense of low ligation efficiency and the need for extensive enzyme titration. To overcome these limitations, we engineered a highly active, TEV protease-activatable caspase-activated DNase (CAD) to enable an efficient, low-sequence-bias, and high-resolution proximity ligation assay we call CAD-C. CAD-C was successful on the first attempt for each human cell line tested and the resulting datasets capture loops, TADs, compartments, and stripes similarly to Micro-C. However, compared to Micro-C and Hi-C, CAD-C shows enhanced sensitivity for promoter-enhancer loops. Leveraging the ligation-competent DNA ends produced by CAD cleavage, we show that CAD-C is compatible with a highly streamlined, repair-free protocol and produces multi-step CADwalks, consecutive ligations between nucleosomal or sub-nucleosomal fragments. With these walks, we probe local chromatin fiber folding contacts, nucleosomal and sub-nucleosomal footprints, and long-range nuclear organization regimes in human cell lines. CAD-C is an efficient, robust chromatin structure assay that can span sub-nucleosomal to chromosomal length scales in a single experiment. ### Competing Interest Statement V.I.R. and J.S. are inventors on a related patent application covering CAD-C (PCT application filed 2024). NIH Common Fund, https://ror.org/001d55x84, 1DP2GM150021 Irma T. Hirschl Trust, https://ror.org/01yaqvf46, Career Scientist Award Rita Allen Foundation, https://ror.org/0515k5w36, Scholar Award Stavros Niarchos Foundation, https://ror.org/0210rze73, Institute for Global Infectious Disease Research at Rockefeller University Grant Robertson Technology Development Fund at Rockefeller University Boehringer Ingelheim (Germany), https://ror.org/00q32j219, PhD Fellowship to JS U.S. National Science Foundation, https://ror.org/021nxhr62, GRFP to LAW International Human Frontier Science Program Organization, https://ror.org/02ebx7v45, Postdoctoral Cross-Disciplinary Fellowship to AO Natural Sciences and Engineering Research Council of Canada, Postgraduate fellowship to HC, Postgraduate fellowship to JLY

Excited to share my PhD work from @riscalab.bsky.social on @biorxivpreprint.bsky.social CAD-C & CADwalks –repair-free, nucleosome-resolution chromosome conformation capture with engineered TEVp-activatable CAD. CADwalks: chromosome walks of ligated CAD footprints. doi.org/10.64898/202...
1/

3 months ago 16 5 1 1
Post image

Epigenetics Update - Interplay between cohesin and RNA polymerase II in regulating chromatin interactions and gene transcription go.nature.com/49iRJkK

Albert W. Cheng and Yijun Ruan (Jackson Laboratory) reporting in NSMB

#Epigenetics #Chromatin
---

Discover the breakthrough at epigenometech.com

3 months ago 2 3 0 0
Post image

Takao Ono, Tatsuya Hirano et al. show that #condensin II collaborates with #cohesin to establish and maintain #chromosome territories, revealing a cooperative mechanism supporting large-scale #genome organization in #interphase. rupress.org/jcb/article/...

#CellCycle #Biochemistry #Chromatin

3 months ago 11 3 0 1
Post image

SMC and recombination enthusiasts: we updated our work describing the loop extrusion properties of budding yeast condensin and its function in biasing donor usage for mating-type switching. Lots of cool new data, check it out!
www.biorxiv.org/content/10.1...

3 months ago 38 24 1 0

A thread on our latest paper from the Whitehouse lab

4 months ago 7 5 0 1
Post image

Hello everybody,
I am looking for an Engineer (IE) to help me start the lab at LBMC / ENS-Lyon in April.
We will investigate chromatin organization during replication in yeast.
RT appreciated!
To apply: inserm.softy.pro/offre/187863

@lbmcinlyon.bsky.social
#NewPI #3DGenome #chromatin #replication

4 months ago 3 9 0 1
Preview
CAD-C reveals centromere pairing and near-perfect alignment of sister chromatids Three-dimensional (3D) genome organization plays a central role in gene regulation, chromatin folding, and genome stability. Although chromosome-conformation capture (3C)-derived methods have revoluti...

Hi all!
We developed CAD-C to map chromatin organization at high res in yeast. It revealed an unexpected tight alignment: nucleosomes covering the same sequence tend to be associated across sister chromatids.

www.biorxiv.org/content/10.6...

#3DGenome #chromatin #Cohesin #centromere

4 months ago 18 11 3 1

Happy to share our new review on 3D chromatin organisation by cohesin with you. It was a great pleasure to review recent advances and future prospects with @danielgerlich.bsky.social.

3 months ago 26 11 0 0
Advertisement

CAD-C: An engineered nuclease enables repair-free in situ proximity ligation and nucleosome-resolution chromosome walks in human cells www.biorxiv.org/content/10.64898/2025.12...

3 months ago 6 4 0 0
Quand dupliquer le génome redessine sa structure de fontaines en vagues Dans un article publié dans Genome Biology, des scientifiques montrent que la réplication de l’ADN n’assure pas seulement la duplication fidèle du gé

www.insb.cnrs.fr/fr/cnrsinfo/...

3 months ago 1 1 0 0

🚨Our work on the impact of DNA replication on 3D genome is out in Genome Biology: replication-dependent loop extrusion by sister-forks, wave of replication, no evidence for large-scale replication factory. Great collab with @aurelepiazza.bsky.social. More here: link.springer.com/article/10.1...

3 months ago 29 11 0 0

A thread on our latest paper from the Whitehouse lab

4 months ago 7 5 0 1