New paper alert! We used our fav technique, genetic suppression, to understand how FimX controls function of the T4P PilB motor ATPase in Pseudomonas aeruginosa. Great collab with the Ellison lab at U Georgia who helped with some fancy microscopy to capture pilus dynamics! doi.org/10.1371/jour...

New paper! Specific PilA and PilY1 sequences make PilU dispensable for T4P-dependent twitching motility in P. aeruginosa. However, most suppressors still had high cAMP levels from loss of PilU, showing that motility and surface sensing responses can be uncoupled.🧐 ⏩ journals.asm.org/doi/10.1128/...

@knutdrescher.bsky.social is advertising a PhD position in their group in Basel 🇨🇭 with a focus on bacterial biofilms Application deadline: 14 November 2025 www.biozentrum.unibas.ch/open-positio...

Such a fun project & massive team effort. We sampled tree cores my 1st yr of grad school then took a year to figure out how to grind wood… ! But we were amazed to find such a complex & unexpected ecosystem inside trees. And we’ve just scratched the surface! We explored 150 trees— 3 trillion to go!

Zip "prevents internalization and destruction of newly released phage progeny, a phenomenon that we call the anti-Kronos effect after the Greek god who consumed his offspring. Zip activity promotes the accumulation of free phages in bacterial lysogen communities, thereby enhancing viral spread."

New paper alert! PhD candidate Nathan Roberge is studying regulation of the #T4P assembly ATPase PilB and identified suppressors of FimX with enhanced motility. Where did they map? Find out here: www.biorxiv.org/content/10.1...

Lovely work by @ianyyen.bsky.social and @gregwhitfield99.bsky.social on the bifunctional ATPase that powers assembly and disassembly of #T4cP type IV pili! www.nature.com/articles/s41...

Nifty - circular pilins! Cryo-EM structure of the conjugation H-pilus reveals the cyclic nature of the TrhA pilin | PNAS www.pnas.org/doi/10.1073/...

While I watch chaotic dismantling efforts in the name of efficiency: 'Few humans on their deathbed have celebrated their achievement of “Inbox Zero.”' www.forkingpaths.co/p/against-op...

If I was 30 years younger...awesome lab!

Please repost!!!!! Abstraction submission for the next Great Wall Symposium is now open! Come to Sicily in September and learn the latest on bacterial cell wall biology. thegreatwall-symposium.org/abstract-sub...

Great week at BLAST XVIII in Cancún - terrific science and conversations with smart people, plus no polar vortex!

Distribution of the four type VI secretion systems in Pseudomonas aeruginosa and classification of their core and accessory effectors @naturecomms.bsky.social from Daniel Unterweger www.nature.com/articles/s41...

Confirmed speakers for the next Great Wall Symposium is coming along! thegreatwall-symposium.org/program/ Abstracts will open next week 15th so start thinking! September 15-17th, Catania, Sicily Its a Microbiological opportunity you cant refuse!

“Now is the time to halt the spread of #H5N1 that is encroaching all around us.”—Bright 6 steps that Biden or Trump admin can take now to prevent a pandemic... fortune.com/well/2025/01... #BlueSky  #MedSky 🧪 #IDSky #scisky #medtwitter #EMSky #EMedSky #nurseSky #MedEd #fmSky #PedSky #birdflu

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Another newly discovered mechanism of bacteria inhibiting competitors - increasing their sensitivity to phages - fascinating www.nature.com/articles/s41...

Trojan horse peptide conjugates remodel the activity spectrum of clinical antibiotics doi.org/10.1073/pnas...

We found that many bacterial species use exogenous peptidoglycan fragments - released by lysis of neighboring cells - as a general danger signal, triggering a danger response that protects bacteria against many dangers: biofilm formation. Details here 👇 www.nature.com/articles/s41...

Peptidoglycan as danger signal promotes biofilm formation - great article by the Drescher lab www.nature.com/articles/s41...

Lay abstracts are hard. It's surprisingly difficult to thread the needle between: "Streptomyces are Gram-positive actinobacteria that biosynthesise a spectrum of bioactive metabolites," and "There is a tiny magic creature that lives in the soil and will make the bad-bad go away." 🧪🦠

Isolation and Characterization of a Novel Jumbo Phage HPP-Temi Infecting Pseudomonas aeruginosa Pa9 and Increasing Host Sensitivity to Ciprofloxacin. DOI: 10.3390/antibiotics13111006 https://pubmed.ncbi.nlm.nih.gov/39596701/

Ten species comprise half of the bacteriology literature, leaving most species unstudied https://www.biorxiv.org/content/10.1101/2025.01.04.631297v1

Cool octopus or elephant vibes.

Antibiotic emergency ‘could claim 40 million lives in next 25 years’

Azithromycin is not typically used for Gram-negative infections due to their outer membrane resistance, but this study shows that VIM-2-induced membrane disruptions unexpectedly increase susceptibility, offering a novel treatment option. Encouraging news 👍 www.nature.com/articles/s41...

Beautiful antibiotic discovery data visualisation, and bang up to date too #MicroSky

15 years data on infections from the US VA: www.thelancet.com/journals/lan... My 3 takeaways: (1) Infection prevention and control works; (2) We still need better antibiotics; and (3) the choice of the denominator in such studies should be carefully made www.thelancet.com/journals/lan...

Structure of the Pseudomonas aeruginosa PAO1 Type IV pilus Finally out in PLOS Pathogens. Congrats Hannah Ochner and co-authors. @mrclmb.bsky.social journals.plos.org/plospathogen...

#ASMBiofilms Mark your calendars - This is shaping up to be a fantastic conference in Fall of 2025 in Portland, Oregon

Supercool work!! Diverse phage coexistence in a clonal bacterial host 🧫

Cool!

Are you working on natural products? We’ve just released version 4.0 of the MIBiG data standard and repository! It now includes 3059 biosynthetic gene clusters, thanks to the combined efforts of 288 expert contributors. A thread: (1/8) academic.oup.com/nar/advance-...

If an #H5N1 pandemic starts tomorrow or in three months, there will be little mystery as to how it happened. The conditions are all there. They have been for a while. So in some ways the more interesting question to me at the moment is: Why aren’t we in a pandemic yet? Story here, 🧵 to come: 🧪#IDSky

Small but mighty - #phages are so interesting and potential lifesavers! nautil.us/medicine-is-...

Really scary - NDM-1-producing #Klebsiella pneumoniae and other essentially untreatable XDR pathogens are infecting injured soldiers. New antibiotics can't come fast enough. www.science.org/content/arti... #AMR

Hoo boy. Not loving the Venn diagram where 'single mutation allows for human infection by #H5N1' meets 'let's make major changes to healthcare in the US'. 🫣

The opportunities, challenges and outlook for LLM-based agents in medicine and healthcare—our paper published today nature.com/articles/s42...

"AI will not replace people anytime soon, but people who use AI might replace those who don’t." doi.org/10.1038/d415...

I'm recruiting a Research Fellow/Postdoc to join my team at #SCELSE to work on food chain biofilms to find new ways to extend food shelf life and reduce food waste. If you have skills in #microbiology and #biofilms apply via Workday: tinyurl.com/3468xm34 or MCF: tinyurl.com/5fyy6hdd. Share widely!

🐄 Seaweed slashes cattle methane A @pnas.org study shows that a seaweed-based feed additive can cut methane emissions in grazing beef cattle by 37.7%, offering a promising path to climate-smart agriculture. www.pnas.org/doi/10.1073/... #SciComm 🧪 🍎

Available postdoc position the translation research team ‘Infection Biology Group’ of the Novo Nordisk Biosustain Center at DTU (Denmark) run by Søren Molin & Helle Krogh Johansen 👇

I'm pumped to finally share our lab's first publication! Microbiology and cancer are deeply intertwined, and this is our first foray into the cancer field. We asked: how do bacteria activate innate immunity in tumors to elicit anti-cancer responses? www.sciencedirect.com/science/arti...

Really excited to be sharing our newest work on the bacterial Tol-Pal complex! The amazing Jiang YEOW solved cryo-EM structures of the TolQRA complex in 2 rotary states, aiding us to come up with a model for force transduction across the cell envelope! Pls RT! #SGBUG #SCELSE_SG #ChemNUS

Core defense hotspots within Pseudomonas aeruginosa are a consistent and rich source of anti-phage defense systems. DOI: 10.1093/nar/gkad317 https://pubmed.ncbi.nlm.nih.gov/37140042/

Impressive work from lab of @evamarianovoa.bsky.social Scalable and reproducible workflow of native RNA nanopore sequencing + NanoConsensus analysis finds significant rRNA modification changes in response to antibiotic stress—genuinely novel concept for AMR research www.nature.com/articles/s41...

The Pseudomonas Genome Database is now on Bluesky with the Pseudomonas.com web address! We encourage using the #pseudomonas hashtag to note interesting research #pseudomonas #bacteria #microsky #idsky #PsWatch

@kellygoldlust.bsky.social glad to see you here, kelly 😊 you might have noticed that we featured your paper in STC > schaechter.asmblog.org/schaechter/2...

Excited to share our latest, "Biofilm dispersal patterns revealed using far-red fluorogenic probes." @plos.bsky.social We developed a cell-labeling strategy using far-red dyes to image dense microbial communities (where fluorescent proteins often do not work well) journals.plos.org/plosbiology/...