Sign in

Alexandra Teslenko

@alexateslenko.bsky.social
556 followers 1.1K following 3 posts

Postdoctoral Researcher👩‍🔬@CeTPD, Alessio Ciulli Lab, Dundee 🇬🇧 Biophysical Chemistry | Chemical and Structural Biology | Drug Discovery

PostsRepliesMedia
Reposted by Alexandra Teslenko
Amy Weeks @amyweeks.bsky.social · 18/07/2025
Excited to share our latest: we engineered the reactivity of a bacterial E1-like enzyme for ATP-driven modification of C termini. Our tool mimics the logic of peptide bond formation in biology for precision modification of proteins in vitro. 🧪https://rdcu.be/ewN7C
rdcu.be
Engineered reactivity of a bacterial E1-like enzyme enables ATP-driven modification of protein and peptide C termini
Nature Chemistry - In living systems, ATP provides an energetic driving force for protein synthesis and modification. Now, an engineered enzymatic tool has been developed for high-yield, ATP-driven...
49741
Reposted by Alexandra Teslenko
Danielle Bianchi @daaninthelab.bsky.social · 04/07/2025
In today’s publication in Science we introduce Zincore: a novel protein of QRICH1 and SEPHS1 and functions as a transcriptional coregulator dedicated to zinc finger transcription factors. Here’s how we found it: 🧵 www.science.org/doi/10.1126/... 1/11
science.org
Zincore, an atypical coregulator, binds zinc finger transcription factors to control gene expression
Zinc finger proteins (ZNFs) are the largest family of transcription factors, yet how they activate gene expression remains unclear. In this study, we identified Zincore, a protein complex consisting o...
313148
Reposted by Alexandra Teslenko
Elena M. Pugacheva, PhD @elenapugacheva.bsky.social · 08/07/2025
Excited to share our latest study published in Nucleic Acids Research: academic.oup.com/nar/article/... It’s the cover story for Issue #12! We drew inspiration from Greek mythology to illustrate the endless work of CTCF in shaping the 3D genome architecture.
academic.oup.com
CTCF binding landscape is shaped by the epigenetic state of the N-terminal nucleosome in relation to CTCF motif orientation
Abstract. CTCF binding sites serve as anchors for the 3D chromatin architecture in vertebrates. The functionality of these anchors is influenced by the res
192
Reposted by Alexandra Teslenko
Ariel Kaplan @arielkaplan.bsky.social · 27/05/2025
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
biorxiv.org
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 ...
24315
Reposted by Alexandra Teslenko
Beat Fierz @beatfierz.bsky.social · 21/05/2025
Our new study of chromatin ubiquitylation by variant PRC1 on the single-molecule scale: We visualize directly how vPRC1 ubiquitylates neighboring nucleosomes during a single binding event, showing a potential mechanism how H2Aub domains are established. www.science.org/doi/10.1126/...
science.org
Single-molecule analysis reveals the mechanism of chromatin ubiquitylation by variant PRC1 complexes
Single-molecule experiments show that active conformation formation controls chromatin ubiquitylation kinetics by variant PRC1.
27629
Alexandra Teslenko @alexateslenko.bsky.social · 22/05/2025
We are very grateful for the long-time financial support from the @erc.europa.eu, @snsf.ch, and EPFL (EDCH) who made this work possible! 🍀
010
Alexandra Teslenko @alexateslenko.bsky.social · 22/05/2025
Using single-molecule dynamics, we observe real-time vPRC1 ubiquitylation of the chromatin fibers. vPRC1 dynamically engages chromatin, a process depending on E2 and H2Aub, while its PCGF subunit governs the formation of the catalytically competent complex with E2~Ub and enzymatic processivity.
Epigenetic landscape navigation by Polycomb complexes.

Using a single-molecule approach, we provide mechanistic insight into how Polycomb enzymes interpret chromatin context to control gene expression. In our study, we reveal that vPRC1 dynamically engages chromatin to form a catalytically competent complex with E2 and ubiquitin, a process governed by subtype-specific activity.
130
Alexandra Teslenko @alexateslenko.bsky.social · 22/05/2025
If you always wanted to know the kinetics of how the Polycomb enzymes modify chromatin, we are thrilled to share our work!!! 🎉📄🧬🔬 Thank you, @beatfierz.bsky.social for all the guidance as well as the @lcbm-epfl.bsky.social group members for all the support! doi.org/10.1126/scia...
doi.org
Single-molecule analysis reveals the mechanism of chromatin ubiquitylation by variant PRC1 complexes
Single-molecule experiments show that active conformation formation controls chromatin ubiquitylation kinetics by variant PRC1.
1265
Reposted by Alexandra Teslenko
Vikram Alva @vikramalva.bsky.social · 12/05/2025
Excited to share our new preprint on HLp—a bacterial histone from Leptospira perolatii that forms stable tetramers and wraps ~60 bp of DNA: "DNA Wrapping by a Tetrameric Bacterial Histone" www.biorxiv.org/content/10.1... @mpi-bio-fml.bsky.social
A snapshot of the HLp tetramer (purple) wrapping ~60 bp of DNA (green).
48837
Reposted by Alexandra Teslenko
Kelton Minor @keltonminor.bsky.social · 18/03/2025
There are days in life that shake you. I’m shattered 💔 to share that I just found out that the US Government terminated my 2024 NIH Director’s Early Independence Award (~$2 million), threatening my long-promised assistant professor job at Columbia University & academic career... 1/🧵
932028824
Reposted by Alexandra Teslenko
Carolyn Bertozzi @carolynbertozzi.bskyverified.social · 06/02/2025
Check it out! Another novel RNA modification - ADP-ribosylation - that was previously only known on proteins. A cousin to #glycoRNA 👏 www.nature.com/articles/s41...
Graphic showing modification of mRNA with ADP-ribose mediated by bacterial enzyme cmdTAC
322481
Reposted by Alexandra Teslenko
Claire Deo @clairedeo.bsky.social · 07/01/2025
We made a photoswitchable HaloTag (psHaloTag), which can reversibly turn-on fluorogenic dyes upon illumination 💡. Congrats to Franzi, Bego and all co-authors, check out our preprint below 👇 www.biorxiv.org/content/10.1...
220852
Reposted by Alexandra Teslenko
Micah G. Allen @micahgallen.com · 02/12/2024
Would you like to see @biorxivpreprint.bsky.social add a share to blue sky button?! I know I would! Share this post to let @richardsever.bsky.social @erictopol.bsky.social and others at bioarxiv know!
A screenshot of a paper on bioarxiv illustrating the lack of blue sky share button!
9385196
Reposted by Alexandra Teslenko
Nina Hartrampf @ninahartrampf.bsky.social · 04/12/2024
🥳 Today we celebrated the PhD defense of our very first PhD student Kevin Schiefelbein 🤩 Kevin told us about his Lasso Peptide journey over the past four years, and it was so great to see the full story coming together. Congratulations Kevin, and thank you for everything! #proudPI
0263
Reposted by Alexandra Teslenko
estella newcombe @estellaan.bsky.social · 27/11/2024
We did this crazy project where we tried to see if proteins could interact with their mirror image ligand. Seems impossible when proteins need to form 3D structures to interact. But what about if the interaction remains disordered??? www.nature.com/articles/s41...
nature.com
Stereochemistry in the disorder–order continuum of protein interactions - Nature
Studies on protein–protein interactions using proteins containing d- or l-amino acids show that stereoselectivity of binding varies with the degree of disorder within the complex.
717763
Reposted by Alexandra Teslenko
Karolin Luger @nucleosomepolice.bsky.social · 23/10/2024
behold our paper on Medusavirus nucleosomes. Fantastic work by Chelsea Toner, @nhoitsma.bsky.social, and Sashi Weerawarana This giant virus also encodes a linker histone, more about that in the paper 🧪👩‍🔬 🧵. www.nature.com/articles/s41...
514953
Reposted by Alexandra Teslenko
Johannes Hohlbein @hohlbeinlab.bsky.social · 13/11/2024
First attempt in a (loosely defined) Single-Molecule Biophysics starter pack. Please share and (self-) nominate. go.bsky.app/CteFZM5
6510760
Reposted by Alexandra Teslenko
bioRxiv Biophysics @biorxiv-biophys.bsky.social · 29/10/2024
Single-molecule analysis reveals the mechanism of chromatin ubiquitylation by variant PRC1 complexes www.biorxiv.org/content/10.1101/202…
biorxiv.org
Single-molecule analysis reveals the mechanism of chromatin ubiquitylation by variant PRC1 complexes https://www.biorxiv.org/content/10.1101/2024.10.25.620026v1
Chromatin regulation relies on "writer" enzymes that add post-translational modifications (PTMs) to
031
Reposted by Alexandra Teslenko
Karim-Jean Armache @kjarmache.bsky.social · 13/11/2024
Please see our paper in Nature on read-write mechanisms of H2AK119 ubiquitination by Polycomb repressive complex I. Congrats to the whole team, especially Victoria and huge thanks to our collaborator JP Armache! Also big thanks to Mark Foundation for Cancer Research for the support! rdcu.be/dZ5HZ
rdcu.be
Read–write mechanisms of H2A ubiquitination by Polycomb repressive complex 1
Nature - Cryo-electron microscopy and biochemical studies elucidate the read–write mechanisms of non-canonical PRC1-containing RYBP in histone H2A lysine 119 monoubiquitination and their...
711531
Reposted by Alexandra Teslenko
Thorn-Seshold Lab @thornsesholdlab.bsky.social · 17/11/2024
📯📯 Chemical Biology starter pack 📯📯 140 PIs & groups posting primary research in chemical biology. Please reskeet (?) & reply to this post if you want to be added! go.bsky.app/KLrTWoj Let's make ChemBioSky even greater again! #realtimechem #FluorescenceFriday #chemsky #chemtwitter #AgentOrange
48138115
Reposted by Alexandra Teslenko
Rune Busk Damgaard @rbdamgaard.bsky.social · 15/11/2024
Check out this list of ubiquitin and Ubl profiles to follow. Repost if you want me to add you to it. Let’s create a good community here ☁️ go.bsky.app/3VPQofn
64848
Reposted by Alexandra Teslenko
Razvan Borza @rborza.bsky.social · 17/11/2024
⚠️THREAD OF ALL SCIENCE-RELATED STARTER PACKS! ⚠️ 🔄Share to help people finding its topic/field - STRUCTURAL BIOLOGY Structural Biology 1: bsky.app/starter-pack... Structural Biology 2: bsky.app/starter-pack... Crystallography: bsky.app/starter-pack... Synchrotron&CryoEM: bsky.app/starter-pack...
39287179
Reposted by Alexandra Teslenko
Waser Group @lcsolab.bsky.social · 23/11/2024
On November 20, the new class of peptide-cyanobenzene dye photocatalysts developed by Xingyu have been first made public in a preprint at ChemRxiv, including a great collaboration Wei Cai in the @beatfierz.bsky.social group and Dr. Anne Sophie Chauvin chemrxiv.org/engage/chemr...
052