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Petya Krasteva

@krastevalab.bsky.social
1.9K followers 2.2K following 40 posts

Structural biologist and microbiologist at the IECB, CNRS, Bordeaux. Loves her kiddos, homies, science and bacteria! www.krasteva-lab.com

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Petya Krasteva @krastevalab.bsky.social · 02/09/2026
It is with great sadness that I learn today of the sudden passing of our colleague Eric Roubin. Rest in peace, Eric, and thank you for your kindness and help with everything IT over the last years. In my country we say that God takes back the good souls early. sts.u-bordeaux.fr/actualites/u...
sts.u-bordeaux.fr
Un métier, un portrait - Ctrl + Alt + Science : l’informatique avec beaucoup d’humain
Pour ce cinquième épisode, mise à l'honneur du métier de responsable système et ressources informatiques. Ordinateurs, logiciels, serveurs mais aussi intelligence artificielle et cybersécurité, les in...
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Petya Krasteva @krastevalab.bsky.social · 02/07/2025
When it's so hot that your car catches fire on the road and you almost explode a gas station🔥🔥🔥
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Kresten Lindorff-Larsen @lindorfflarsen.bsky.social · 09/06/2025
This paper combines two sort-of-crazy (in the best sense) approaches in cryoEM sample preparation: (1) Native, soft-landing electrospray ion beam deposition, followed by (2) deposition of amorphous ice, and reheating and freezing by laser flash melting. Has potential for time-resolved studies.
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Petya Krasteva @krastevalab.bsky.social · 26/05/2025
Two weeks left to apply!!!
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Joshua J. Friedman @joshuajfriedman.com · 23/05/2025
NEW: Judge Burroughs GRANTS Harvard's requested TRO against the Trump administration, blocking it from revoking Harvard's ability to enroll international students during early court proceedings.
ORDER GRANTING PLAINTIFF'S
MOTION FOR A TEMPORARY RESTRAINING ORDER
For purposes of Federal Rule of Civil Procedure 65(b), the President and Fellows of
Harvard College ("Plaintiff") has made a sufficient showing that it has provided notice to
Defendants Department of Homeland Security, Kristi Noem, Immigration and Customs
Enforcement, Todd Lyons, Department of Justice, Pamela Bondi, Student and Exchange Visitor
Program, Jim Hicks, Department of State, and Marco Rubio (collectively, "Defendants") and that, unless its Motion for a Temporary Restraining Order ("TRO"), [ECF No. 4 (the "Motion")],
is granted, it will sustain immediate and irreparable injury before there is an opportunity to hear
from all parties. Thus, a TRO is justified to preserve the status quo pending a hearing and the Plaintiff's Motion is GRANTED.
Accordingly, Defendants, their agents, and anyone acting in concert or participation with
Defendants are hereby enjoined from:
A. Implementing,
instituting, maintaining, or giving effect to the revocation of
Plaintiff's SEVP certification;
B. Giving any force or effect to the Department of Homeland Security's May 22, 2025
Revocation Notice.

It is so ordered
May 23, 2025
/s/Allison D. Burroughs
ALLISON D. BURROUGHS
U.S. DISTRICT JUDGE
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Ewan Birney @ewanbirney.bsky.social · 22/05/2025
This is just an excellent preprint by Rasmus Jensen and colleagues from Julia Mahamid's lab @embl.org - a tour de force of Cryogenic electron tomography to do in cell structural biology in which they discover a new complex and solve its structure and function! www.biorxiv.org/content/10.1...
biorxiv.org
In-cell discovery and characterization of a non-canonical bacterial protein translocation-folding complex
Cryo-electron tomography has emerged as powerful technology for in-cell structural biology, and in combination with breakthroughs in protein structure prediction, offers a unique opportunity for illum...
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Petya Krasteva @krastevalab.bsky.social · 22/05/2025
Someone posted this and I have been back to the original on repeat since 😄.. Captures perfectly the current mood, Imma losin' m'self in the sciencccccce 🤓🤓🤓🤓 youtu.be/xYtaBfwpg_k?...
youtu.be
Eminem - LOSE YOURSELF (Sung by 331 Movies!)
YouTube video by The Unusual Suspect
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Petya Krasteva @krastevalab.bsky.social · 28/04/2025
Fellow ladies in science, as part of the disappearing species of international female scientists in France and perhaps every/elsewhere, I want to bring your special attention to our institute's open call for group leaders 👩‍🔬🦠🧪🔬🤓!!! Come join me in doing some coolicious science here 🙏!
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European Research Council (ERC) @erc.europa.eu · 20/04/2025
🦠 Most #bacteria form #biofilms, protective communities that resist #antibiotics. Petya Krasteva's research explores the structure & behaviour of these biofilms, hoping to develop new #antimicrobial strategies. Read more 👉 buff.ly/YajqauG @krastevalab.bsky.social @iecb.bsky.social @CNRS.fr
buff.ly
Deciphering the formation of cooperative multicellular biofilms
Bacterial films are a hazard throughout the healthcare system, and as antibiotic resistance increases there is an even greater imperative...
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antoineloquet.bsky.social @antoineloquet.bsky.social · 17/02/2025
Check our study in press in JACS on the use of solid-state #NMR to investigate polysaccharides in encapsulated pathogens, demonstrated on #Cryptococcus neoformans. Congrats to Alons Lends and all coworkers @iecb.bsky.social @cnrs.fr @univbordeaux.bsky.social pubs.acs.org/doi/10.1021/...
pubs.acs.org
Molecular Distinction of Cell Wall and Capsular Polysaccharides in Encapsulated Pathogens by In Situ Magic-Angle Spinning NMR Techniques
Pathogenic fungal and bacterial cells are enveloped within a cell wall, a molecular barrier at their cell surface, and a critical architecture that constantly evolves during pathogenesis. Understandin...
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Petya Krasteva @krastevalab.bsky.social · 15/02/2025
I am not a chemist and must be brain-dead after prolonged ogling of electron density clouds but how TF is this cellopentaose 🤔?
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Petya Krasteva @krastevalab.bsky.social · 15/02/2025
And another one bites the flux 🤘🤘🤘! Molecular replacement was tricky mostly because of Alphafold lacking imagination 😅! Beautiful home source data at 1.9 Å courtesy again of Xtal master @bkauffmann.bsky.social at our @iecb.bsky.social
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Khaled_Selim Lab @selimlab.bsky.social · 31/01/2025
Big News (a bit late 🙃): my group is moving to Düsseldorf @hhu.bsky.social Looking for next adventure w awesome colleagues @frunzkelab.bsky.social @kedrov-lab.bsky.social @apmweber.bsky.social Plz RT, positions available for #PhD & #postdoc w focus #CryoEM & #cdiAMP www.hhu.de/news-einzela...
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Brice Kauffmann @bkauffmann.bsky.social · 12/02/2025
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Petya Krasteva @krastevalab.bsky.social · 12/02/2025
Has been a while since we bothered to set up crystal trays, cryo-EM got us so spoiled 😄.. Not bad data either, home source dataset at 1.7 Å courtesy of our Xtal guru @bkauffmann.bsky.social at our @iecb.bsky.social 🤓🙏💠..
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Petya Krasteva @krastevalab.bsky.social · 11/02/2025
Welcome to Bluesky and thank you for this post 🙏. Indeed it was a real rollercoaster and this grant came as a lifeboat in the cold and lifeless ocean of public research in France, where institutional support is a net negative 😄. So we'll rock on for another 5 years while ignoring admin emails 🤘🤘🤘
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Sean D. Stacey, Ph.D. @seandstacey.bsky.social · 20/11/2024
OK, this is just a damn cool article 🤯 🦠 🔬 Infecting the cell nucleus, gaining nutrients, but preventing cell death! www.nature.com/articles/s41...
nature.com
An intranuclear bacterial parasite of deep-sea mussels expresses apoptosis inhibitors acquired from its host - Nature Microbiology
‘Candidatus Endonucleobacter’ is a pathogen of deep-sea mussels that can successfully reproduce in the nuclei of its host by expressing inhibitors of apoptosis, likely acquired through horizontal gene...
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Petya Krasteva @krastevalab.bsky.social · 20/11/2024
Happy to share our 📖 chapter on bacterial cellulose secretion! It took too long in press so it doesn't include our latest work on pEtN-cellulose secretion (doi.org/10.1038/s414...), which settled many open questions but nevertheless, hope you enjoy the read 🤓! link.springer.com/chapter/10.1...
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Petya Krasteva @krastevalab.bsky.social · 19/11/2024
That's the spirit, fuck bubbles as enjoyable as they might be 😄! Disclaimer: no personal energy to engage on that network meself 🙈🙈🙈
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Petya Krasteva @krastevalab.bsky.social · 15/11/2024
WowWowWow!!! Mechanism of histone H1 killing MRSA 🤓! Congratulations to all the authors 👌
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Florian Jug @florianjug.bsky.social · 15/11/2024
Is this now happening for real? Are we acknowledging that SciTwitter transitions to BlueSci?!? 🤩 #bluesci #migration
A Bluesky butterfly in a sciency appearance to support the science subcommunity on this platform: BlueSci
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DjuranovicLab at Brown University RNA Center @djuranoviclab.bsky.social · 13/11/2024
@djuranoviclab.bsky.social will be Djuranovic lab at Brown University and newly formed RNA Center from July 1st 2025. Postdoc as well as staff scientist positions will be available. www.brown.edu/news/2024-02...
brown.edu
Changing the future of medicine: How Brown is becoming a global hub for RNA research
The ambitious goal of the new Brown RNA Center is to untangle the mysteries of human RNA, which could be instrumental in preventing and developing treatments for a wide variety of complex diseases.
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Harry Low’s Lab @lowlab.bsky.social · 11/11/2024
Now out in NSMB for those who missed our biorxiv back in 2023.. bacterial ESCRT-III-like #Vipp1 forms dynamic spiral filaments on membrane! Spirals are springs that drive 3D ring formation in the spiral centre! 😵‍💫 wonderful collaboration with Adai Colom’s lab and @rouxlab.bsky.social rdcu.be/dZSPQ
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IECB Bordeaux @iecb.bsky.social · 12/11/2024
A CORDIS_EU feature of our @krastevalab.bsky.social 's ERC StG project BioMatrix on bacterial biofilm formation, which highlights the pivotal role of our institute's infrastructure! cordis.europa.eu/article/id/4...
cordis.europa.eu
Deciphering the formation of cooperative multicellular biofilms
Bacterial films are a hazard throughout the healthcare system, and as antibiotic resistance increases there is an even greater imperative...
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Reposted by Petya Krasteva
IECB Bordeaux @iecb.bsky.social · 09/11/2024
Join us in December for a week of daily matinées in Molecular Biophysics 🤩!!! Speaker line-up below, the venue is our IECB amphitheater, doors open at 10:30 for a snack and chat before exciting science 🤓!
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Mikayel Aznauryan @mazna.bsky.social · 09/11/2024
I put this here to acquaint our newly growing bsky network with our recent work on how the disordered translation factor eIF4B navigates accross its self-association landscape encoded by its peculiar sequence and plasticity. rdcu.be/dZCaJ
rdcu.be
Disordered regions of human eIF4B orchestrate a dynamic self-association landscape
Nature Communications - This study reveals how the intrinsically disordered region of eIF4B governs its transition from monomers to oligomers and condensed droplets, providing key insights into how...
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Petya Krasteva @krastevalab.bsky.social · 08/11/2024
Seeing so many new members and groups here 🥰 I am resuming activity on my account to stay in touch with disillusioned colleagues and friends leaving X and to clean my feed from BS. Staying on X however, as I believe we need more outreach than ever and less, not more, bubbles in science and society!
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Petya Krasteva @krastevalab.bsky.social · 08/11/2024
Happy to share this 👶 peer-reviewed here: we crack how E. coli and proteobacteria assemble cellulose secretion systems to recruit proxies for polymer decoration and nanomolar c-di-GMP sensing and diversify an otherwise boring synthase with low c-di-GMP affinity and 1 sugar-1 linkage mechanism!
nature.com
Structural basis for synthase activation and cellulose modification in the E. coli Type II Bcs secretion system - Nature Communications
Bacteria can synthesize and secrete cellulosic polymers using membrane-associated multiprotein complexes consisting of cellulose synthases and accessory subunits. Here, Anso et al. use cryogenic elect...
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Petya Krasteva @krastevalab.bsky.social · 06/06/2024
The latest completed work from our ERC StG BioMatrix is now online 🤩🦠🧫🔬🧪🤓: mechanisms for c-di-GMP sensing and synthase activation by proxy, pEtN-transferase recruitment and polymer modification: www.biorxiv.org/content/10.1...
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Petya Krasteva @krastevalab.bsky.social · 24/01/2024
Nice highlight of our recent research on intracellular scaffolds for bacterial cellulose secretion 😍😍😍🙏🙏🙏 Original works from my lab: Abidi et al. in Science Advances (2022, left) and Sana et al. in Current Biology (2023, right). www.cell.com/current-biol...
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Petya Krasteva @krastevalab.bsky.social · 23/01/2024
Still not used to this platform.. are there ways to bookmark posts? Are there ways to send DMs so that not everyone is spammed with private ruminations?
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Petya Krasteva @krastevalab.bsky.social · 22/12/2023
Kicking off the winter with our latest paper on bacterial cellulose (BC) secretion 🤩🤩🤩!! Roles for BcsD/CesD beyond BC crystallinity and more dedicated intracellular BcsD-Proline rich partner scaffolds for cellulose secretion across Proteobacteria: www.cell.com/current-biol...
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Patrick R. Secor @prsecor.bsky.social · 11/12/2023
Umbrella toxin particles produced by Streptomyces block mycelial growth of competing species www.biorxiv.org/content/10.1...
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bioRxiv Microbiology @biorxiv-microbiol.bsky.social · 13/12/2023
PvdL Orchestrates the Assembly of the Nonribosomal Peptide Synthetases Involved in Pyoverdine Biosynthesis in Pseudomonas aeruginosa. www.biorxiv.org/content/10.1101/202…
biorxiv.org
PvdL Orchestrates the Assembly of the Nonribosomal Peptide Synthetases Involved in Pyoverdine Biosynthesis in Pseudomonas aeruginosa. https://www.biorxiv.org/content/10.1101/2023.12.12.571276v1
The pyoverdine siderophore is produced by Pseudomonas aeruginosa to access iron. Its synthesis invol
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Thibault G. Sana, PhD @thibgsana.bsky.social · 06/12/2023
Ever wondered how Pseudomonas aeruginosa "choose" between planktonic and biofilm lifestyles, at the molecular level? 🦠🔬🧐 #CryoEM Fantastic team work from the @krastevalab.bsky.social (and yes, I'm biased 😊) See the paper here: www.pnas.org/doi/10.1073/...
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Petya Krasteva @krastevalab.bsky.social · 06/12/2023
Our latest paper just came out at PNAS 🤩! Structures of the P. aeruginosa FleQ-FleN master regulators reveal large-scale conformational switching in motility and biofilm control. ERC-funded, as usual. www.pnas.org/doi/abs/10.1...
pnas.org
PNAS
Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...
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Alex Crits-Christoph @acritschristoph.bsky.social · 01/12/2023
Naturally occurring CRISPRi proteins. In one case, phage use them to repress a host flagellin gene, which is then replaced with a version of the gene the phage carries. What a discovery!
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Petya Krasteva @krastevalab.bsky.social · 29/11/2023
Starting off here with a throwback to our last years paper on finally cracking crystalline cellulose secretion by the Gluconactobacter lineage: the longest studied c-di-GMP-responsive and EPS secretion system: www.science.org/doi/10.1126/...
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