Erwan Gueguen

@macerwan.bsky.social

Molecular microbiology assistant-professor at University of Lyon. I tweet only about Science here. I work on Pectobacteriaceae. I don't like bacteria that can't be genetically manipulated. Lab website: https://sites.google.com/view/mtsb

🧬 The kick-off meeting of the Erasmus+ Blended Intensive Programme “Microbes in Focus” took place on May 18th, 2026, with all selected students attending. This international programme focuses on modern molecular microbiology, microbial genetics, and the study of microorganisms. 🧵👇

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MSCA Postdoctoral Fellowship 2026 opportunity. Join my team at Lyon 1 University Claude Bernard to study functional genetics of plant pathogens. Full details are available in the attached document. Internal Deadline: June 15, 2026

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Nous recrutons un Maître ou une Maîtresse de conférences en bactériologie moléculaire pour notre équipe MTSB au laboratoire MAP à Lyon, France. Le poste combine recherche sur l'adaptation des bactéries phytopathogènes et enseignement en génétique microbienne. Notre team : sites.google.com/view/mtsb

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New pub. from the lab ! We discovered that potato tubers exert intense selective pressure during Dickeya solani infection, driving the rapid emergence of mutations in the sRNA ArcZ. These mutations lead to the appearance of "social cheaters" that sweep through the pop. in as few as 30 generations.

bioRxiv Microbiology@biorxiv-microbiol.bsky.social · 8mo ago

Host infection selects for sRNA variants that drive bacterial social cheating https://www.biorxiv.org/content/10.64898/2025.12.19.695336v1

Quite an interesting protein search AI model combining sequence, structure, and function text - faster and more accurate than similarity searches. Who has tried it🤩🙌? Only a few secs to search bacterial TFs and integrases #microsky 🧬🧪 www.nature.com/articles/s41...

A trimodal protein language model enables advanced protein searches - Nature Biotechnology

A protein foundation model represents protein sequence, structure and function.

nature.com

1. Kevin Gross and I just posted a new science-of-science preprint. This one explores the looming peer review crisis. As many of you know, it's becoming significantly more difficult for journal editors to find scholars willing to serve as peer reviewers for submitted manuscripts.

Will anyone review this paper? Screening, sorting, and the feedback cycles that imperil peer review

Scholarly publishing relies on peer review to identify the best science. Yet finding willing and qualified reviewers to evaluate manuscripts has become an increasingly challenging task, possibly even ...

arxiv.org

@cnrsecologie.bsky.social regrette profondément l'adoption de cette loi à la vision court-termiste & ses conséquences graves sur l’environnement, qui méprise santé & bien-être de la population & le rôle des espèces sauvages dans la prod. agricole. La communauté scientifique n'a pas été entendue.

Agence France-Presse@afp.com · last yr.

Le Parlement a définitivement adopté mardi la proposition de loi agricole Duplomb-Menonville, comprenant entre autres une mesure décriée de réintroduction sous conditions d'un pesticide néonicotinoïde, et présentée comme une réponse à la colère agricole de 2024.

Researchers uncover a new class of retropepsin-like proteases in P. aeruginosa that are required for biofilm formation & bacterial survival under stress conditions, including antibiotic exposure, making them appealing therapeutic targets. #mBio: asm.social/2sq

Phenotypic characterization of RloA protease mutants in Pseudomonas aeruginosa. (A) Biofilm formation in PA14 wild type and ∆rloA1-3 mutants was assessed through crystal violet staining of overnight cultures grown in 0.4% Arginine M63 media (top). Graph shows the normalized average intensity of crystal violet staining (OD550) relative to the growth of the corresponding bacterial culture (OD600), n = 4. Error bars show standard deviation. (B) PA14 wild-type and ∆rloA1-3 mutant colonies were grown in Congo red 0.2% glucose M63 agar. Scale bar represents 2 mm. (C) Ampicillin ETEST strips tested on lawns of PA14 wild-type and ∆rloA1-3 mutant strains grown on Mueller-Hinton agar. Graph shows the average minimal inhibitory concentration (MIC) from triplicate experiments. Error bars show standard deviation. (D) Scanning electron micrographs of PA14 wild-type (top) and ∆rloA1-3 mutant cells (bottom). Scale bar represents 4 µm.

Where is the money going? In the case of for-profit publishers it's very clear: Your open access fees fund corporate profit margins. Profit margins for large academic publishers can far exceed those of household names like Amazon and Apple. chart source: bit.ly/4leULKi #scipub #academicsky

Chart shows profit margin for Elsevier is 38%, for Springer-Nature is 27%... this is in comparison to companies like Apple (25%), Amazon (5%)... There are non-publishing companies like Microsoft with big margins (34%), but overall the chart shows that academic publishing companies have surprisingly large profits when compared to more "famous" large companies that are household names. "Source" line says "yahoo finance, RELX investor presentations, Spring Nature Annual Reports
David Green, PhD@ecologistgreen.bsky.social · last yr.

It shouldn’t cost thousands of dollars to publish #OpenAccess. Where is that money even going??? #SciPub 🧪

A paper in Nature presents an AI model that can outperform existing Earth system forecasts. The model, named Aurora, could enable more accurate and efficient forecasting of air quality, tropical cyclone paths, and ocean wave dynamics, as well as high-resolution weather forecasting. 🌊 ⚒️ 🧪

A foundation model for the Earth system - Nature

Aurora, a new large-scale foundation model trained on more than one million hours of diverse geophysical data, outperforms operational forecasts in predicting air quality, ocean wave dynamics, tropical cyclone tracks and high-resolution weather.

go.nature.com

🎓 Looking for a postdoc with a background in bacteriology to join my team to study pectinolytic bacteria via a #MSCA fellowship 🇪🇺 (up to 3 yrs in France). 📅 Expression of interest by June 15. The MSCA application deadline is September 10, 2025. 🔗 Info in attached files #Pectobacteriaceae

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