Stephen Garrett
@stephenrgarrett.bsky.social
EMBO Postdoctiral Fellow in the Whitney lab at McMaster University, working on interbacterial warfare and phage defense
Very happy to have been part of this work from the Mariano lab, identifying 11 hotspots enriched in phage defence systems in Pseudomonas aeruginosa. It was great to get the chance to collaborate with @giusym1990.bsky.social again!
academic.oup.com/nargab/artic...
academic.oup.com/nargab/artic...
Validate User
academic.oup.com
November 25, 2025 at 11:00 PM
Very happy to have been part of this work from the Mariano lab, identifying 11 hotspots enriched in phage defence systems in Pseudomonas aeruginosa. It was great to get the chance to collaborate with @giusym1990.bsky.social again!
academic.oup.com/nargab/artic...
academic.oup.com/nargab/artic...
Reposted by Stephen Garrett
Excited to share our new study! Great fun working again with my good friend @stephenrgarrett.bsky.social — always a highlight! Huge thanks to fantastic co-authors @samkaytucker.bsky.social, @drandyjroe.bsky.social and our star technician Vojtech Pavelka. academic.oup.com/nargab/artic...
November 21, 2025 at 5:45 PM
Excited to share our new study! Great fun working again with my good friend @stephenrgarrett.bsky.social — always a highlight! Huge thanks to fantastic co-authors @samkaytucker.bsky.social, @drandyjroe.bsky.social and our star technician Vojtech Pavelka. academic.oup.com/nargab/artic...
Reposted by Stephen Garrett
Our latest T7SS study is now out in Science Advances!
We solved the cryoEM structure of the T7SSb core unit (T7bCU) composed of YukB, YukC, and YukD from Bacillus subtilis, revealing how these components assemble within the secretion machinery.
www.science.org/doi/10.1126/...
We solved the cryoEM structure of the T7SSb core unit (T7bCU) composed of YukB, YukC, and YukD from Bacillus subtilis, revealing how these components assemble within the secretion machinery.
www.science.org/doi/10.1126/...
A ubiquitin-like protein controls assembly of a bacterial type VIIb secretion system
Cryo-EM structure reveals how a ubiquitin-like protein orchestrates assembly of a bacterial weapon system.
www.science.org
November 21, 2025 at 7:05 PM
Our latest T7SS study is now out in Science Advances!
We solved the cryoEM structure of the T7SSb core unit (T7bCU) composed of YukB, YukC, and YukD from Bacillus subtilis, revealing how these components assemble within the secretion machinery.
www.science.org/doi/10.1126/...
We solved the cryoEM structure of the T7SSb core unit (T7bCU) composed of YukB, YukC, and YukD from Bacillus subtilis, revealing how these components assemble within the secretion machinery.
www.science.org/doi/10.1126/...
Reposted by Stephen Garrett
There's just over 2 weeks left to apply for a fully funded PhD studentship with us working on C. difficile vancomycin resistance. Two more studentships - linked in the thread below - close in early January
November 19, 2025 at 1:45 PM
There's just over 2 weeks left to apply for a fully funded PhD studentship with us working on C. difficile vancomycin resistance. Two more studentships - linked in the thread below - close in early January
Reposted by Stephen Garrett
#microsky #phagesky
Intriguing instance of a reversible type of mutation from #phage exposure
www.biorxiv.org/content/10.1...
Intriguing instance of a reversible type of mutation from #phage exposure
www.biorxiv.org/content/10.1...
The repertoire of resistance mutations selected by a Pseudomonas aeruginosa type IV pilus-targeting lytic bacteriophage
P. aeruginosa type IV pili (T4P) are complex surface-exposed nanomachines used for twitching motility and biofilm formation. Exposure to bacteriophages that use T4P as their primary receptor can selec...
www.biorxiv.org
November 18, 2025 at 7:55 PM
#microsky #phagesky
Intriguing instance of a reversible type of mutation from #phage exposure
www.biorxiv.org/content/10.1...
Intriguing instance of a reversible type of mutation from #phage exposure
www.biorxiv.org/content/10.1...
Reposted by Stephen Garrett
PhD opportunity (unfortunately UK home students only) to work on nanoparticles to combat AMR with @forganross.bsky.social and me in UoG. If you have a microbiology background and an interest in chemistry this would be a perfect project for you! Please share!
University of Glasgow - Colleges - College of Medical, Veterinary & Life Sciences - MVLS Graduate School - PhD Research Opportunities - College Futures Themes PhD Programme - Projects - Advanced Diagn...
www.gla.ac.uk
November 17, 2025 at 9:25 AM
PhD opportunity (unfortunately UK home students only) to work on nanoparticles to combat AMR with @forganross.bsky.social and me in UoG. If you have a microbiology background and an interest in chemistry this would be a perfect project for you! Please share!
Reposted by Stephen Garrett
🚨 PhD opportunity! 🚨
Join us at St Andrews to study how multiple prophages shape bacterial behaviour & AMR.
Co-supervised with @tatianadimitriu.bsky.social
This is a competition-based EASTBIO PhD.
Full details and the application link are in the advert 👇
www.findaphd.com/phds/project...
Join us at St Andrews to study how multiple prophages shape bacterial behaviour & AMR.
Co-supervised with @tatianadimitriu.bsky.social
This is a competition-based EASTBIO PhD.
Full details and the application link are in the advert 👇
www.findaphd.com/phds/project...
EASTBIO: When Phages Collide: Understanding How Multiple Prophages Shape Bacterial Behaviour at University of St Andrews on FindAPhD.com
PhD Project - EASTBIO: When Phages Collide: Understanding How Multiple Prophages Shape Bacterial Behaviour at University of St Andrews, listed on FindAPhD.com
www.findaphd.com
November 17, 2025 at 3:13 PM
🚨 PhD opportunity! 🚨
Join us at St Andrews to study how multiple prophages shape bacterial behaviour & AMR.
Co-supervised with @tatianadimitriu.bsky.social
This is a competition-based EASTBIO PhD.
Full details and the application link are in the advert 👇
www.findaphd.com/phds/project...
Join us at St Andrews to study how multiple prophages shape bacterial behaviour & AMR.
Co-supervised with @tatianadimitriu.bsky.social
This is a competition-based EASTBIO PhD.
Full details and the application link are in the advert 👇
www.findaphd.com/phds/project...
Reposted by Stephen Garrett
A fantastic opportunity with two amazing supervisors!
🚨 PhD Opportunity 🚨
Interested in microbiology, phages & water security?
Join me and Prof Cindy Smith to test phages as a sustainable alternative to chlorine in drinking-water biofilters.
Metagenomics, phage discovery & ecology — all in one exciting project!
Apply: www.gla.ac.uk/colleges/mvl...
Interested in microbiology, phages & water security?
Join me and Prof Cindy Smith to test phages as a sustainable alternative to chlorine in drinking-water biofilters.
Metagenomics, phage discovery & ecology — all in one exciting project!
Apply: www.gla.ac.uk/colleges/mvl...
November 16, 2025 at 4:31 PM
A fantastic opportunity with two amazing supervisors!
Reposted by Stephen Garrett
PhD opportunity in the lab of a young PI who’s simply going stratospheric, on using #phage for water treatment. What’s not to like? You can’t miss this chance.
#microsky #phagesky
#microsky #phagesky
🚨 PhD Opportunity 🚨
Interested in microbiology, phages & water security?
Join me and Prof Cindy Smith to test phages as a sustainable alternative to chlorine in drinking-water biofilters.
Metagenomics, phage discovery & ecology — all in one exciting project!
Apply: www.gla.ac.uk/colleges/mvl...
Interested in microbiology, phages & water security?
Join me and Prof Cindy Smith to test phages as a sustainable alternative to chlorine in drinking-water biofilters.
Metagenomics, phage discovery & ecology — all in one exciting project!
Apply: www.gla.ac.uk/colleges/mvl...
November 15, 2025 at 3:46 PM
Reposted by Stephen Garrett
🚨 PhD Opportunity 🚨
Interested in microbiology, phages & water security?
Join me and Prof Cindy Smith to test phages as a sustainable alternative to chlorine in drinking-water biofilters.
Metagenomics, phage discovery & ecology — all in one exciting project!
Apply: www.gla.ac.uk/colleges/mvl...
Interested in microbiology, phages & water security?
Join me and Prof Cindy Smith to test phages as a sustainable alternative to chlorine in drinking-water biofilters.
Metagenomics, phage discovery & ecology — all in one exciting project!
Apply: www.gla.ac.uk/colleges/mvl...
November 15, 2025 at 3:30 PM
🚨 PhD Opportunity 🚨
Interested in microbiology, phages & water security?
Join me and Prof Cindy Smith to test phages as a sustainable alternative to chlorine in drinking-water biofilters.
Metagenomics, phage discovery & ecology — all in one exciting project!
Apply: www.gla.ac.uk/colleges/mvl...
Interested in microbiology, phages & water security?
Join me and Prof Cindy Smith to test phages as a sustainable alternative to chlorine in drinking-water biofilters.
Metagenomics, phage discovery & ecology — all in one exciting project!
Apply: www.gla.ac.uk/colleges/mvl...
Reposted by Stephen Garrett
Happy to share the last paper form the lab:
Specialized shuttle proteins recognize
T9SS signals and target
effectors to their final destinations. Great work by @maellepllt.bsky.social, led by @thicoz.bsky.social in collaboration with @audebertstephane.bsky.social
www.nature.com/articles/s42...
Specialized shuttle proteins recognize
T9SS signals and target
effectors to their final destinations. Great work by @maellepllt.bsky.social, led by @thicoz.bsky.social in collaboration with @audebertstephane.bsky.social
www.nature.com/articles/s42...
Specialized shuttle proteins recognize Type IX secretion signals and target effectors to their final destinations in Flavobacterium johnsoniae
Communications Biology - Bacteroidota use the Type IX secretion system to secrete proteins with a conserved C-terminal domain (CTD) secretion signal domain. Type B CTDs require specific shuttle...
www.nature.com
November 15, 2025 at 3:55 PM
Happy to share the last paper form the lab:
Specialized shuttle proteins recognize
T9SS signals and target
effectors to their final destinations. Great work by @maellepllt.bsky.social, led by @thicoz.bsky.social in collaboration with @audebertstephane.bsky.social
www.nature.com/articles/s42...
Specialized shuttle proteins recognize
T9SS signals and target
effectors to their final destinations. Great work by @maellepllt.bsky.social, led by @thicoz.bsky.social in collaboration with @audebertstephane.bsky.social
www.nature.com/articles/s42...
Reposted by Stephen Garrett
Bacteria export alarmone synthetases that produce (p)ppApp and (p)ppGpp 🦠🤯
From Boyuan Wang and John Whitney
journals.asm.org/doi/10.1128/...
From Boyuan Wang and John Whitney
journals.asm.org/doi/10.1128/...
Bacteria export alarmone synthetases that produce (p)ppApp and (p)ppGpp | mBio
Alarmone synthetases are intracellular enzymes that promote bacterial survival by
responding to environmental stress. Although extracellular alarmone production has
been reported in Streptomyces, the ...
journals.asm.org
November 15, 2025 at 12:42 PM
Bacteria export alarmone synthetases that produce (p)ppApp and (p)ppGpp 🦠🤯
From Boyuan Wang and John Whitney
journals.asm.org/doi/10.1128/...
From Boyuan Wang and John Whitney
journals.asm.org/doi/10.1128/...
Reposted by Stephen Garrett
Please RT. Post-doc opportunity alert! 💥 closing 10th December.. Come join our team (www.thelowlab.org) at Imperial, London, working on the structure and mechanism of bacterial secretion systems.
For more details and to apply please see
www.imperial.ac.uk/jobs/search-...
For more details and to apply please see
www.imperial.ac.uk/jobs/search-...
November 4, 2025 at 5:20 PM
Please RT. Post-doc opportunity alert! 💥 closing 10th December.. Come join our team (www.thelowlab.org) at Imperial, London, working on the structure and mechanism of bacterial secretion systems.
For more details and to apply please see
www.imperial.ac.uk/jobs/search-...
For more details and to apply please see
www.imperial.ac.uk/jobs/search-...
Reposted by Stephen Garrett
Hi everyone, a few years ago, we started a list of labs studying bacterial immunty for students, editors, conference organizers... (currently n=79).
Update time ! Send me a message to 1) add your lab or others 2) Correct info
docs.google.com/spreadsheets...
#Phagesky #Microsky
Update time ! Send me a message to 1) add your lab or others 2) Correct info
docs.google.com/spreadsheets...
#Phagesky #Microsky
Labs in bacterial immunity
docs.google.com
November 4, 2025 at 3:06 PM
Hi everyone, a few years ago, we started a list of labs studying bacterial immunty for students, editors, conference organizers... (currently n=79).
Update time ! Send me a message to 1) add your lab or others 2) Correct info
docs.google.com/spreadsheets...
#Phagesky #Microsky
Update time ! Send me a message to 1) add your lab or others 2) Correct info
docs.google.com/spreadsheets...
#Phagesky #Microsky
Reposted by Stephen Garrett
Remarkable increase in vancomycin resistance among clinical Enterococcus faecium isolates in Italy (from 11.5% in 2015 to 32.4% in 2023).
aricjournal.biomedcentral.com/articles/10....
aricjournal.biomedcentral.com/articles/10....
Temporal trend and individual and hospital characteristics associated to vancomycin-resistant Enterococcus faecium bloodstream infections: a retrospective analysis from the national surveillance syste...
Background Several countries have reported an increase in vancomycin-resistant Enterococcus faecium (VREF), a pathogen classified by the WHO as a high-priority threat due to its role in healthcare-ass...
aricjournal.biomedcentral.com
October 18, 2025 at 7:54 PM
Remarkable increase in vancomycin resistance among clinical Enterococcus faecium isolates in Italy (from 11.5% in 2015 to 32.4% in 2023).
aricjournal.biomedcentral.com/articles/10....
aricjournal.biomedcentral.com/articles/10....
Reposted by Stephen Garrett
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...
Twitching motility suppressors reveal a role for FimX in type IV pilus extension dynamics
Author summary Type IV pili enable Pseudomonas aeruginosa to attach to surfaces, move (twitch), and form biofilms. Pilus extension is powered by the motor protein PilB, which is regulated by other fac...
doi.org
October 13, 2025 at 8:18 PM
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...
Some really cool work from @shelbyeandersen.bsky.social in the @duerkoplab.bsky.social using a new approach to identify novel phage defence systems.
Serine recombinases are conserved genetic markers of antiphage defense systems https://www.biorxiv.org/content/10.1101/2025.10.07.681051v1
October 8, 2025 at 3:25 PM
Some really cool work from @shelbyeandersen.bsky.social in the @duerkoplab.bsky.social using a new approach to identify novel phage defence systems.
Reposted by Stephen Garrett
🚨PhD Opportunity Alert🚨 Join me, @suzieh.bsky.social and @walllabuoglasgow.bsky.social to investigate how environment shapes anti-phage defences & prophage–prophage conflict in Pseudomonas aeruginosa.
Apply here:
www.gla.ac.uk/postgraduate...
Apply here:
www.gla.ac.uk/postgraduate...
October 1, 2025 at 7:58 PM
🚨PhD Opportunity Alert🚨 Join me, @suzieh.bsky.social and @walllabuoglasgow.bsky.social to investigate how environment shapes anti-phage defences & prophage–prophage conflict in Pseudomonas aeruginosa.
Apply here:
www.gla.ac.uk/postgraduate...
Apply here:
www.gla.ac.uk/postgraduate...
Reposted by Stephen Garrett
PhD opportunity to come and work in Glasgow, developing advanced tissue culture models to study Staphylococcus aureus colonisation and infection #microsky #PhD #DTPprogram
Enquiries from potential applicants are welcome.
www.gla.ac.uk/postgraduate...
www.findaphd.com/phds/program...
Enquiries from potential applicants are welcome.
www.gla.ac.uk/postgraduate...
www.findaphd.com/phds/program...
University of Glasgow - Postgraduate study - Centres for Doctoral Training - NorthWest Biosciences - Our Projects - Understanding Pathogens, from Molecules to Phenotypes - Justine Rudkin
www.gla.ac.uk
September 30, 2025 at 12:52 PM
PhD opportunity to come and work in Glasgow, developing advanced tissue culture models to study Staphylococcus aureus colonisation and infection #microsky #PhD #DTPprogram
Enquiries from potential applicants are welcome.
www.gla.ac.uk/postgraduate...
www.findaphd.com/phds/program...
Enquiries from potential applicants are welcome.
www.gla.ac.uk/postgraduate...
www.findaphd.com/phds/program...
Really excited to share my first paper from the Whitney lab, alongside an amazing grad student, Polina. Here we identify a chaperone family required for the folding of a central domain of T7SS toxins, and solve the structure of the chaperone-toxin complex. www.pnas.org/doi/10.1073/...
A widespread family of molecular chaperones promotes the intracellular stability of type VIIb secretion system–exported toxins | PNAS
To survive in highly competitive environments, bacteria use specialized secretion
systems to deliver antibacterial toxins into neighboring cells, t...
www.pnas.org
September 15, 2025 at 11:41 PM
Really excited to share my first paper from the Whitney lab, alongside an amazing grad student, Polina. Here we identify a chaperone family required for the folding of a central domain of T7SS toxins, and solve the structure of the chaperone-toxin complex. www.pnas.org/doi/10.1073/...
Reposted by Stephen Garrett
In our new article, we show how P. aeruginosa, a major cause of chronic respiratory infections in #cysticfibrosis (CF), uses the Type VI Secretion System #T6SS and specific #toxins to eliminate competing bacteria
www.cell.com/cell-reports...
#cryoEM @dshatskiy.bsky.social @jakecolautti.bsky.social
www.cell.com/cell-reports...
#cryoEM @dshatskiy.bsky.social @jakecolautti.bsky.social
September 14, 2025 at 8:52 AM
In our new article, we show how P. aeruginosa, a major cause of chronic respiratory infections in #cysticfibrosis (CF), uses the Type VI Secretion System #T6SS and specific #toxins to eliminate competing bacteria
www.cell.com/cell-reports...
#cryoEM @dshatskiy.bsky.social @jakecolautti.bsky.social
www.cell.com/cell-reports...
#cryoEM @dshatskiy.bsky.social @jakecolautti.bsky.social
Reposted by Stephen Garrett
Thrilled to share our two latest papers with the @tcostalab.bsky.social
lab! In the first, we uncover a new mechanism of satellite transfer: cf-PICIs hijack tails from diverse phages to spread across species.
@imperialcollegeldn.bsky.social
www.cell.com/cell/fulltex...
lab! In the first, we uncover a new mechanism of satellite transfer: cf-PICIs hijack tails from diverse phages to spread across species.
@imperialcollegeldn.bsky.social
www.cell.com/cell/fulltex...
Chimeric infective particles expand species boundaries in phage-inducible chromosomal island mobilization
Capsid-forming PICIs (cf-PICIs) produce their own capsids and exploit phage tails
from unrelated species to transfer their DNA across bacterial hosts. This tail piracy
enables broad dissemination and ...
www.cell.com
September 9, 2025 at 5:05 PM
Thrilled to share our two latest papers with the @tcostalab.bsky.social
lab! In the first, we uncover a new mechanism of satellite transfer: cf-PICIs hijack tails from diverse phages to spread across species.
@imperialcollegeldn.bsky.social
www.cell.com/cell/fulltex...
lab! In the first, we uncover a new mechanism of satellite transfer: cf-PICIs hijack tails from diverse phages to spread across species.
@imperialcollegeldn.bsky.social
www.cell.com/cell/fulltex...
Reposted by Stephen Garrett
Excited to share that my work in the @aaronwhiteley.bsky.social lab describing chaperone-mediated phage sensing by a bacterial NLR-related protein is out in @plosbiology.org!
Bacteria encode homologs of the human NACHT proteins that form inflammasomes and use them to defend against phage #infection. @amyconte.bsky.social @aaronwhiteley.bsky.social &co show that bNACHT25 detects diverse phages indirectly through interaction with the host chaperone DnaJ. 🧪
plos.io/4koXP60
plos.io/4koXP60
DnaJ mediates phage sensing by the bacterial NLR-related protein bNACHT25
Bacteria encode homologs of the human NACHT proteins that form inflammasomes, and use them to defend against phage infection. This study shows that the NLR-related protein bNACHT25 detects diverse pha...
plos.io
June 4, 2025 at 1:45 PM
Excited to share that my work in the @aaronwhiteley.bsky.social lab describing chaperone-mediated phage sensing by a bacterial NLR-related protein is out in @plosbiology.org!
Reposted by Stephen Garrett
Excited to share my PhD work in the Kranzusch Lab published in @nature.com!
Two key discoveries:
- Nucleotides can act as negative regulators of antiviral immunity
- Ion channel activation is gated by DNA
Thank you to our all collaborators! @soreklab.bsky.social
www.nature.com/articles/s41...
Two key discoveries:
- Nucleotides can act as negative regulators of antiviral immunity
- Ion channel activation is gated by DNA
Thank you to our all collaborators! @soreklab.bsky.social
www.nature.com/articles/s41...
A DNA-gated molecular guard controls bacterial Hailong anti-phage defence - Nature
Nature - A DNA-gated molecular guard controls bacterial Hailong anti-phage defence
www.nature.com
April 30, 2025 at 6:57 PM
Excited to share my PhD work in the Kranzusch Lab published in @nature.com!
Two key discoveries:
- Nucleotides can act as negative regulators of antiviral immunity
- Ion channel activation is gated by DNA
Thank you to our all collaborators! @soreklab.bsky.social
www.nature.com/articles/s41...
Two key discoveries:
- Nucleotides can act as negative regulators of antiviral immunity
- Ion channel activation is gated by DNA
Thank you to our all collaborators! @soreklab.bsky.social
www.nature.com/articles/s41...
Reposted by Stephen Garrett
Out in Nature today: A new immune signaling molecule, His-ADPR, is produced by defensive TIR domain proteins in bacteria to protect from phage
Joint work with the Tamulaitienė and Kranzusch labs
www.nature.com/articles/s41...
Congrats Carmel Avraham, Dziugas Sabonis, Renee Chang and co-authors!
Joint work with the Tamulaitienė and Kranzusch labs
www.nature.com/articles/s41...
Congrats Carmel Avraham, Dziugas Sabonis, Renee Chang and co-authors!
April 30, 2025 at 6:44 PM
Out in Nature today: A new immune signaling molecule, His-ADPR, is produced by defensive TIR domain proteins in bacteria to protect from phage
Joint work with the Tamulaitienė and Kranzusch labs
www.nature.com/articles/s41...
Congrats Carmel Avraham, Dziugas Sabonis, Renee Chang and co-authors!
Joint work with the Tamulaitienė and Kranzusch labs
www.nature.com/articles/s41...
Congrats Carmel Avraham, Dziugas Sabonis, Renee Chang and co-authors!