Zeynep Baharoglu
@zeynepbaharoglu.bsky.social
RNA modifications, antibiotic tolerance, bacterial stress, non coding RNAs, Vibrio cholerae.
Institut Pasteur & EGM (IBPC, CNRS)
Institut Pasteur & EGM (IBPC, CNRS)
genome-wide CRISPRi screens to map how uropathogenic E. coli (UPEC) survives in human urine 🦠 #AMR #UTI
Genome-scale CRISPRi profiling reveals metabolic vulnerabilities of uropathogenic Escherichia coli in human urine
Urinary tract infections (UTIs) are among the most common infectious diseases, causing over 400 million cases and 260,000 deaths annually. Women are disproportionately affected, with ∼50% experiencing...
www.biorxiv.org
November 7, 2025 at 4:19 PM
Reposted by Zeynep Baharoglu
Next Codon Usage Meeting, May 31st to June 3rd, 2026 in Montreal right after the RNA Society Meeting. The list of speakers will be up soon.
sites.google.com/view/codonus...
sites.google.com/view/codonus...
codon usage
About the Conference
Codon usage bias—the preference for certain synonymous codons—is a key factor in genome regulation. Codon usage and synonymous codon mutations have been shown to influence gene ex...
sites.google.com
November 5, 2025 at 10:55 PM
Next Codon Usage Meeting, May 31st to June 3rd, 2026 in Montreal right after the RNA Society Meeting. The list of speakers will be up soon.
sites.google.com/view/codonus...
sites.google.com/view/codonus...
and the English version. Thanks @pasteur.fr for highlighting this study. 🦠 #AMR
November 7, 2025 at 7:02 AM
and the English version. Thanks @pasteur.fr for highlighting this study. 🦠 #AMR
On hibernation factors 🦠 #ribosome www.biorxiv.org/content/10.1...
The evolution lifecycle of ribosome hibernation factors
Bacteria defend against hostile environments through a variety of molecular mechanisms, including ribosome hibernation. Previously, bacteria were shown to initiate ribosome hibernation by activating p...
www.biorxiv.org
November 5, 2025 at 4:19 PM
On hibernation factors 🦠 #ribosome www.biorxiv.org/content/10.1...
The authors explore targeting intrinsic resistance mechanisms (those built into bacterial physiology rather than acquired resistance genes) in Escherichia coli, to both sensitize bacteria to antibiotics and reduce their ability to evolve new resistance 🦠 #AMR dx.plos.org/10.1371/jour...
Impeding pathways of intrinsic resistance in Escherichia coli confers antibiotic sensitization and resistance proofing
Intrinsic resistance pathways in E. coli can be exploited to enhance antibiotic sensitivity and limit resistance evolution. This study shows that genetic inhibition of efflux pumps and cell envelope b...
dx.plos.org
November 5, 2025 at 9:54 AM
The authors explore targeting intrinsic resistance mechanisms (those built into bacterial physiology rather than acquired resistance genes) in Escherichia coli, to both sensitize bacteria to antibiotics and reduce their ability to evolve new resistance 🦠 #AMR dx.plos.org/10.1371/jour...
A sulfur-containing nucleoside antibiotic from Photorhabdus | mBio journals.asm.org/doi/10.1128/...
A sulfur-containing nucleoside antibiotic from Photorhabdus | mBio
Introducing novel antibiotics is essential to counter the spread of drug-resistant pathogens. Here, we report the discovery of 4′-thiothymidine (4′sT), a nucleoside antibiotic from the nematode symbiont Photorhabdus asymbiotica, identified through activation of a silent biosynthetic gene cluster. 4′sT features an unusual 4′-thiosugar moiety. We identified its biosynthetic gene cluster, including a radical SAM enzyme presumably involved in sulfur incorporation. 4′sT exhibits strain-selective activity that is governed by differences in thymidine metabolism rather than variations in the molecular target. These findings expand our knowledge of antibiotics with unusual selective activity.
journals.asm.org
November 4, 2025 at 2:50 PM
A sulfur-containing nucleoside antibiotic from Photorhabdus | mBio journals.asm.org/doi/10.1128/...
Our new paper maps the tRNA modification landscape in Vibrio cholerae! 💫
We describe differences from E. coli and discuss links to decoding of stress-related codons 🦠
Huge thanks to amazing co-authors and collaborators!
@plos.org #rnasky #microsky #tRNAmodifications
We describe differences from E. coli and discuss links to decoding of stress-related codons 🦠
Huge thanks to amazing co-authors and collaborators!
@plos.org #rnasky #microsky #tRNAmodifications
The tRNA epitranscriptomic landscape and RNA modification enzymes in Vibrio cholerae
Author summary This study charts the first genome-wide map of transfer RNA (tRNA) modifications in the cholera pathogen, Vibrio cholerae, revealing how chemical marks on tRNAs shape translation and st...
journals.plos.org
November 3, 2025 at 11:58 PM
Our new paper maps the tRNA modification landscape in Vibrio cholerae! 💫
We describe differences from E. coli and discuss links to decoding of stress-related codons 🦠
Huge thanks to amazing co-authors and collaborators!
@plos.org #rnasky #microsky #tRNAmodifications
We describe differences from E. coli and discuss links to decoding of stress-related codons 🦠
Huge thanks to amazing co-authors and collaborators!
@plos.org #rnasky #microsky #tRNAmodifications
🎃 Trick or transcript?
Bacteria rewire their RNA world under stress & infection. tRNA mods as dual-function sensors, phage tRNA slashers, hibernating ribosomes & haunted translation hubs.
🧬🧪 Full November 1st issue → #RNAmod #Epitranscriptomics #HalloweenScience
#rnasky #microsky
Bacteria rewire their RNA world under stress & infection. tRNA mods as dual-function sensors, phage tRNA slashers, hibernating ribosomes & haunted translation hubs.
🧬🧪 Full November 1st issue → #RNAmod #Epitranscriptomics #HalloweenScience
#rnasky #microsky
📰 🎃 RNA Modifications Newsletter – October 31st - November 1st, 2025
Issue #5
rnamodifupdates.substack.com
October 31, 2025 at 8:14 PM
🎃 Trick or transcript?
Bacteria rewire their RNA world under stress & infection. tRNA mods as dual-function sensors, phage tRNA slashers, hibernating ribosomes & haunted translation hubs.
🧬🧪 Full November 1st issue → #RNAmod #Epitranscriptomics #HalloweenScience
#rnasky #microsky
Bacteria rewire their RNA world under stress & infection. tRNA mods as dual-function sensors, phage tRNA slashers, hibernating ribosomes & haunted translation hubs.
🧬🧪 Full November 1st issue → #RNAmod #Epitranscriptomics #HalloweenScience
#rnasky #microsky
A Quantitative Proteome Map of the Human Body: Cell www.cell.com/cell/fulltex...
A Quantitative Proteome Map of the Human Body
Proteomics analysis across human tissues from the GTeX resource reveals insight into
tissue-specific pathways and phenotypes arising from genetic diseases.
www.cell.com
October 31, 2025 at 1:48 PM
A Quantitative Proteome Map of the Human Body: Cell www.cell.com/cell/fulltex...
🦠💊 L’Institut @pasteur.fr vient de publier un communiqué de presse sur nos récents travaux, qui décrivent une nouvelle piste pour augmenter l’efficacité des antibiotiques. #Pasteurdon #Recherche #Science #AMR
Merci à toutes celles et ceux qui ont contribué.
📘 English version coming soon!
Merci à toutes celles et ceux qui ont contribué.
📘 English version coming soon!
Une piste prometteuse pour augmenter l’efficacité des antibiotiques
Les aminosides sont des antibiotiques efficaces contre de très nombreuses bactéries telles que Escherichia coli, Pseudomonas aeruginosa ou Staphylococcus aureus. Mais jusqu’à présent, personne ne sava...
www.pasteur.fr
October 31, 2025 at 10:37 AM
🦠💊 L’Institut @pasteur.fr vient de publier un communiqué de presse sur nos récents travaux, qui décrivent une nouvelle piste pour augmenter l’efficacité des antibiotiques. #Pasteurdon #Recherche #Science #AMR
Merci à toutes celles et ceux qui ont contribué.
📘 English version coming soon!
Merci à toutes celles et ceux qui ont contribué.
📘 English version coming soon!
Reposted by Zeynep Baharoglu
🚨 #RNAsky 🚨
Exciting news for the RNA research community!
The Human RNome Project has been launched: a global effort to map all human RNAs and their chemical modifications. Proud to support it and contribute to the article in Genome Biology doi.org/10.1186/s130...
#RNA #bioinformatics #RNAstructure #modomics
The Human RNome Project has been launched: a global effort to map all human RNAs and their chemical modifications. Proud to support it and contribute to the article in Genome Biology doi.org/10.1186/s130...
#RNA #bioinformatics #RNAstructure #modomics
Unlocking the regulatory code of RNA: launching the Human RNome Project - Genome Biology
The human RNome, the complete set of RNA molecules in human cells, arises through complex processing and includes diverse molecular species. While research traditionally focuses on four canonical nucl...
genomebiology.biomedcentral.com
October 26, 2025 at 6:02 PM
🚨 #RNAsky 🚨
EF-G variants (fusA mutants) slow down ribosome translocation only when the ribosome is bound by an aminoglycoside => the antibiotic isn’t displaced, but translation on that ribosome is effectively stalled 🦠 rdcu.be/eNt96
Selective silencing of antibiotic-tethered ribosomes as a resistance mechanism against aminoglycosides
Nature Communications - Mutations in elongation factor G protect bacteria from aminoglycoside antibiotics through unknown mechanisms. Here, the authors show that the mutations selectively slow the...
rdcu.be
October 30, 2025 at 1:10 PM
EF-G variants (fusA mutants) slow down ribosome translocation only when the ribosome is bound by an aminoglycoside => the antibiotic isn’t displaced, but translation on that ribosome is effectively stalled 🦠 rdcu.be/eNt96
Reposted by Zeynep Baharoglu
🧬 New review on nanopore basecalling models is out! ✨
Congrats to @soniacruciani.bsky.social (former Novoa Lab PhD, now postdoc at the Deplancke Lab, EPFL) and @evamarianovoa.bsky.social👏
📖 www.nature.com/articles/s41...
Congrats to @soniacruciani.bsky.social (former Novoa Lab PhD, now postdoc at the Deplancke Lab, EPFL) and @evamarianovoa.bsky.social👏
📖 www.nature.com/articles/s41...
Client Challenge
www.nature.com
October 14, 2025 at 12:28 PM
🧬 New review on nanopore basecalling models is out! ✨
Congrats to @soniacruciani.bsky.social (former Novoa Lab PhD, now postdoc at the Deplancke Lab, EPFL) and @evamarianovoa.bsky.social👏
📖 www.nature.com/articles/s41...
Congrats to @soniacruciani.bsky.social (former Novoa Lab PhD, now postdoc at the Deplancke Lab, EPFL) and @evamarianovoa.bsky.social👏
📖 www.nature.com/articles/s41...
Nucleoid structure and dynamics influence natural chromosomal transformation in Bacillus subtilis: the role of EbfC url: academic.oup.com/nar/article/...
Nucleoid structure and dynamics influence natural chromosomal transformation in Bacillus subtilis: the role of EbfC
Abstract. Natural chromosomal transformation (NCT) in Bacillus subtilis requires RecA and its accessory proteins including RecX and RecD2. Inactivation of
academic.oup.com
October 25, 2025 at 12:10 PM
Nucleoid structure and dynamics influence natural chromosomal transformation in Bacillus subtilis: the role of EbfC url: academic.oup.com/nar/article/...
MazF endoribonuclease promotes resolution of transcription–replication conflicts at ribosomal RNA genes in Escherichia coli url: academic.oup.com/nar/article/...
MazF endoribonuclease promotes resolution of transcription–replication conflicts at ribosomal RNA genes in Escherichia coli
Abstract. Toxins from toxin–antitoxin (TA) systems, widely distributed genetic elements in prokaryotic genomes, are traditionally viewed as growth inhibito
academic.oup.com
October 25, 2025 at 12:04 PM
MazF endoribonuclease promotes resolution of transcription–replication conflicts at ribosomal RNA genes in Escherichia coli url: academic.oup.com/nar/article/...
Pan-modification profiling facilitates a cross-evolutionary dissection of the thermoregulated ribosomal epitranscriptome #rnasky #microsky www.cell.com/cell/abstrac...
Pan-modification profiling facilitates a cross-evolutionary dissection of the thermoregulated ribosomal epitranscriptome
Pan-Mod-seq enables systematic, multi-modification mapping of rRNA across life. Applying
it to diverse organisms reveals that hyperthermophiles dynamically install stabilizing
modifications to support...
www.cell.com
October 25, 2025 at 7:52 AM
Pan-modification profiling facilitates a cross-evolutionary dissection of the thermoregulated ribosomal epitranscriptome #rnasky #microsky www.cell.com/cell/abstrac...
Epitranscriptomic control of stress adaptations in Escherichia coli 💫🦠from Kirsten Jung lab #rnasky #microsky www.biorxiv.org/content/10.1...
www.biorxiv.org
October 25, 2025 at 7:51 AM
Epitranscriptomic control of stress adaptations in Escherichia coli 💫🦠from Kirsten Jung lab #rnasky #microsky www.biorxiv.org/content/10.1...
Mapping rRNA, tRNA, and mRNA modifications in ribosomes at high resolution: Trends in Biochemical Sciences www.cell.com/trends/bioch...
Mapping rRNA, tRNA, and mRNA modifications in ribosomes at high resolution
Chemical modifications of rRNA, tRNA, and mRNA play key roles in protein synthesis
by affecting the structure of these RNAs, by modulating decoding, and by influencing
ribosomal efficiency. Recent adv...
www.cell.com
October 24, 2025 at 8:28 AM
Mapping rRNA, tRNA, and mRNA modifications in ribosomes at high resolution: Trends in Biochemical Sciences www.cell.com/trends/bioch...
Reposted by Zeynep Baharoglu
Dissecting the impact of transcription factor dose on cell reprogramming heterogeneity using scTF-seq | Nature Genetics www.nature.com/articles/s41...
Dissecting the impact of transcription factor dose on cell reprogramming heterogeneity using scTF-seq - Nature Genetics
This study introduces single-cell transcription factor (TF) sequencing, a single-cell barcoded and doxycycline-inducible TF overexpression approach that reveals dose-sensitive functional classes of TF...
www.nature.com
October 20, 2025 at 6:14 AM
Dissecting the impact of transcription factor dose on cell reprogramming heterogeneity using scTF-seq | Nature Genetics www.nature.com/articles/s41...
New species from space 🦠💫Genomic characterization of Microbacterium meiriae sp. nov., a novel bacterium isolated from the International Space Station www.nature.com/articles/s41...
Genomic characterization of Microbacterium meiriae sp. nov., a novel bacterium isolated from the International Space Station - Scientific Reports
Scientific Reports - Genomic characterization of Microbacterium meiriae sp. nov., a novel bacterium isolated from the International Space Station
www.nature.com
October 18, 2025 at 12:52 PM
New species from space 🦠💫Genomic characterization of Microbacterium meiriae sp. nov., a novel bacterium isolated from the International Space Station www.nature.com/articles/s41...
RNase Y + Y-complex initiate rRNA cleavage in B. subtilis, shrinking ribosome pools under stress while ppGpp limits synthesis. => Dual control -> better fitness. Bonus: Y-complex includes YmcA doi.org/10.1101/2025.06.27.661978
October 13, 2025 at 9:43 AM
RNase Y + Y-complex initiate rRNA cleavage in B. subtilis, shrinking ribosome pools under stress while ppGpp limits synthesis. => Dual control -> better fitness. Bonus: Y-complex includes YmcA doi.org/10.1101/2025.06.27.661978
Reposted by Zeynep Baharoglu
#MicroSky OLD amputates the anticodon arm of tRNAs during P2–Lambda interference #PhageSky #RNASky 🧪
September 17, 2025 at 11:51 AM
Mycobacterial TrmI (m¹A58) is linked to aminoglycoside tolerance. Ribosomes stall in an alanine-rich region that controls whiB7, and trans-translation increases this stalling, keeping WhiB7 active and helping mycobacteria survive antibiotic stress.🦠#rnasky => preprint www.biorxiv.org/content/10.1...
tRNA-modification mutants in mycobacteria boost antibiotic recalcitrance by activating WhiB7 & coupling alanine metabolism to ribosome rescue and survival, new study reveals.
✍️ @jvaubourgeix.bsky.social & coll.
📖 shorturl.at/86JTs
#MicroSky #AMR #RNAsky
@imperialcollegeldn.bsky.social @inserm.fr
✍️ @jvaubourgeix.bsky.social & coll.
📖 shorturl.at/86JTs
#MicroSky #AMR #RNAsky
@imperialcollegeldn.bsky.social @inserm.fr
October 13, 2025 at 7:29 AM
Mycobacterial TrmI (m¹A58) is linked to aminoglycoside tolerance. Ribosomes stall in an alanine-rich region that controls whiB7, and trans-translation increases this stalling, keeping WhiB7 active and helping mycobacteria survive antibiotic stress.🦠#rnasky => preprint www.biorxiv.org/content/10.1...