Andy Katznelson
@andykatznelson.bsky.social
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PhD student in the Zaret lab at Penn
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Andy Katznelson
Gurdon Institute, University of Cambridge
3 months ago
It is with great sadness that we share the news of the death of our founder, colleague, mentor and friend, Professor Sir John Gurdon. His vision and dedication will continue to inspire generations of scientists. đź”—
www.gurdon.cam.ac.uk/nobel-laurea...
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Eric Joyce
5 months ago
🚨New preprint from the lab🚨 🧬 What keeps certain chromatin domains anchored at the nuclear periphery? Our new genome-wide HiDRO screen uncovers a key role for RNA-binding protein hnRNPK.
www.biorxiv.org/content/10.1...
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Mechanistic and Epigenetic Partitioning of Lamina-Associated Chromatin Revealed by a Genome-Wide Imaging Screen
The nuclear periphery is a key site for heterochromatin organization in eukaryotic cells, where lamina-associated domains (LADs) promote transcriptional repression and genome stability. Despite their ...
https://www.biorxiv.org/content/10.1101/2025.08.13.670143v1
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Graham Coop
7 months ago
The university of California is a powerhouse of innovation, healthcare, and social mobility for California and the US.
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Ariel Kaplan
7 months ago
1/ New preprint! How do transcription factors (TFs) use intrinsically disordered regions (IDRs) to find their target sites?
www.biorxiv.org/content/10.1...
#TranscriptionFactors
#IDPs
#SingleMolecule
#Biophysics
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Intrinsically disordered regions facilitate Msn2 target search to drive promoter selectivity
Transcription factors (TFs) regulate gene expression by binding specific DNA motifs, yet only a fraction of putative sites is occupied in vivo. Intrinsically disordered regions (IDRs) have emerged as ...
https://www.biorxiv.org/content/10.1101/2025.05.23.654710v1
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Di Jiang
7 months ago
🧬@science.org ASB7 is a negative regulator of H3K9me3 homeostasis | Science
www.science.org/doi/10.1126/...
#epigenetics
#chromatin
#genetics
#histone
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ASB7 is a negative regulator of H3K9me3 homeostasis
The maintenance of H3K9me3 involves the recognition of pre-existing modifications by HP1, which recruits methyltransferase SUV39H1 to methylate the adjacent newly incorporated histones, thereby establ...
https://www.science.org/doi/10.1126/science.adq7408
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Andy Katznelson
Blake Hernandez
8 months ago
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 đź§µ)
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Eric Topol
9 months ago
It has taken decades to get to this point, but stem cells for Parkinson's disease showing promise in 2 clinical trials
nature.com/articles/d41...
nature.com/articles/s41...
nature.com/articles/s41...
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Clinical trials test the safety of stem-cell therapy for Parkinson’s disease
Transplanting dopamine-releasing neurons into the brain is a promising regenerative therapy for Parkinson’s disease. Two clinical trials show that it is safe, but more evidence is needed to prove its ...
https://nature.com/articles/d41586-025-00688-x
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Barack Obama
9 months ago
Harvard has set an example for other higher-ed institutions - rejecting an unlawful and ham-handed attempt to stifle academic freedom, while taking steps to make sure students can benefit from an environment of intellectual inquiry, rigorous debate and mutual respect. Let’s hope others follow suit.
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Michael Eisen
10 months ago
As a Jew I will feel a lot safer at Columbia knowing that there are fewer graduate students toiling in labs to cure cancer and drug addiction.
add a skeleton here at some point
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Andy Katznelson
11 months ago
Recently joined Bluesky, so sharing here. Our latest work on bioRxiv. Using cell-cycle dynamics and NIPBL depletion, we show that long-range enhancer-promoter interactions can form de novo without loop extrusion.
www.biorxiv.org/content/10.1...
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Cis-regulatory chromatin contacts form de novo in the absence of loop extrusion
NIPBL promotes chromatin loop extrusion by the cohesin complex until it stalls at convergently oriented CTCF sites, leading to the formation of structural loops. However, to what extent loop extrusion...
https://www.biorxiv.org/content/10.1101/2025.01.12.632634v1
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Carolyn Bertozzi
11 months ago
Another assault on US competitiveness at a time when biomedicine is roaring with innovation, an own-goal in a high-stakes international tournament. Of course the real losers are American people needing medicines and cures.
www.washingtonpost.com/health/2025/...
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NIH cuts billions of dollars in biomedical funding, effective immediately
The move halts a large slice of money for most universities and research institutions virtually overnight, imperiling vital research in everything from cancer to heart disease.
https://www.washingtonpost.com/health/2025/02/08/nih-cuts-billions-dollars-biomedical-funding-effective-immediately/
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Romain Koszul
11 months ago
Our latest work: how can compartmentalization emerge in a eukaryotic genome lacking canonical heterochromatin? By investigating bacterial genomes put in yeast, we show that the presence or absence of transcription is sufficient!
#chromatin
#3Dgenome
#generegulation
www.science.org/doi/10.1126/...
👇
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Sequence-dependent activity and compartmentalization of foreign DNA in a eukaryotic nucleus
In eukaryotes, DNA-associated protein complexes coevolve with genomic sequences to orchestrate chromatin folding. We investigate the relationship between DNA sequence and the spontaneous loading and a...
https://www.science.org/doi/10.1126/science.adm9466
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Ewan Birney
about 1 year ago
Before Christmas I did threads on the application areas of genomics in rare disease (
bsky.app/profile/ewan...
) and in common disease (
bsky.app/profile/ewan...
) - now I am going to focus on Cancer genomics
add a skeleton here at some point
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Andy Katznelson
Benjamin Weekley, Ph.D.
about 1 year ago
Has anyone had success modeling histone peptides (with PTMs) or nuclesomes (with histone tail PTMs) with chromatin reader proteins using Alphafold or Chai1? If so, any tips? Most iterations I try have the histone tail flopping off to the side
#Chromatin
#Alphafold
#Epigenetics
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Late to the party, but alphafold is mind blowing. A high confidence heterodimer that would take an entire team months can be predicted by a grad student procrastinating writing, in minutes, on coffee shop wifi.
about 1 year ago
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Andy Katznelson
The Lewis Lab
about 1 year ago
"Dark TFs": new manuscript mapped 166 uncharacterized human transcription factors, finding half bind genomic "dark matter," often closed chromatin rich in transposable elements.
www.biorxiv.org/content/10.1...
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So. Much. Cool. Science. Here. Really invigorating. To my old friends and new, hi đź‘‹
about 1 year ago
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