(not) Imran Khan
@imrsankhan.bsky.social
๐ค 140
๐ฅ 216
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UCC. Staph man. Insane for the membrane. He/Him.
pinned post!
Our work deciphering the substrate preferences of a di-/tripeptide transporter from S. aureus is now available as a proof at
@plos.org
Pathogens! Big thanks to the reviewers and to all the brilliant co-authors, particularly Callum who helped get those last few crucial experiments across the line
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Defined roles for the Staphylococcus aureus POT transporter DtpT in di/tripeptide uptake and glutathione utilisation inside human macrophages
Author summary The environments where bacterial pathogens thrive are often rich in proteins and their degradation products, including oligopeptides, which can be taken up by the bacterium and used as ...
https://journals.plos.org/plospathogens/article?id=10.1371/journal.ppat.1013535
about 1 month ago
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รkos T Kovรกcs
5 days ago
#ISMEJournal
paper from Simon Heilbronner Competitive fitness of Staphylococcus aureus against nasal commensals depends on biotin biosynthesis and acquisition
academic.oup.com/ismej/advanc...
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Competitive fitness of Staphylococcus aureus against nasal commensals depends on biotin biosynthesis and acquisition
Abstract. The human nasal microbiome can serve as a reservoir for pathogens. In particular, the opportunistic pathogen Staphylococcus aureus can be a membe
https://academic.oup.com/ismej/advance-article/doi/10.1093/ismejo/wraf248/8314006
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(not) Imran Khan
7 days ago
Both the UCC and Bristol based lab members getting together in person at the Irish Division
@microbiologysociety.org
meeting.
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New tricks for OppA! Very exciting work
add a skeleton here at some point
26 days ago
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reposted by
(not) Imran Khan
Emmanuele Severi
about 1 month ago
www.microbiologyresearch.org/content/jour...
#microsky
#microbiome
from the
@gavinhthomas.bsky.social
lab in York in collab with Hull
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High-resolution Staphylococcus profiling reveals intra-species diversity in a single skin niche
The skin microbiome is dominated by a few key genera, among which Staphylococcus is one of the most well characterized. Recent studies have examined the roles of various Staphylococcus species such as...
https://www.microbiologyresearch.org/content/journal/mgen/10.1099/mgen.0.001531
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Jason Yang
about 1 month ago
Very happy to share some more good news. Our collaboration with Jeffrey Boyd's lab is now published at J Inorganic Biochemistry! Here, Jeff found that iron limitation reprograms S. aureus metabolism towards fermentation. We're grateful to be part of this study.
www.sciencedirect.com/science/arti...
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Fermentative growth decreases the iron demand of Staphylococcus aureus
Iron (Fe) is an essential nutrient for S. aureus survivability and pathogenesis, but excess Fe can catalyze the formation of toxic oxygen radicals, emโฆ
https://www.sciencedirect.com/science/article/pii/S016201342500265X?dgcid=coauthor
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Our work deciphering the substrate preferences of a di-/tripeptide transporter from S. aureus is now available as a proof at
@plos.org
Pathogens! Big thanks to the reviewers and to all the brilliant co-authors, particularly Callum who helped get those last few crucial experiments across the line
loading . . .
Defined roles for the Staphylococcus aureus POT transporter DtpT in di/tripeptide uptake and glutathione utilisation inside human macrophages
Author summary The environments where bacterial pathogens thrive are often rich in proteins and their degradation products, including oligopeptides, which can be taken up by the bacterium and used as ...
https://journals.plos.org/plospathogens/article?id=10.1371/journal.ppat.1013535
about 1 month ago
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(not) Imran Khan
Nature Microbiology
about 2 months ago
#NewResearch
Nasal colonisation by S. aureus is linked with depression in a human cohort and shown in a mouse model to cause decreased serotonin and dopamine in the brain
#MicroSky
#Depression
www.nature.com/articles/s41...
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Nasal Staphylococcus aureus carriage promotes depressive behaviour in mice via sex hormone degradation - Nature Microbiology
Nasal colonization by Staphylococcus aureus is linked with depression in a human cohort and shown in a mouse model to cause decreased serotonin and dopamine in the brain.
https://www.nature.com/articles/s41564-025-02120-6?utm_source=bluesky&utm_medium=social&utm_campaign=nmicrobiol
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(not) Imran Khan
about 2 months ago
Latest from Lizzie Ledger in the labโฆ. Very cool story demonstrating the cross reactivity of a single AMR mechanism to confer resistance/tolerance to two distinct classes of antibiotics.
journals.asm.org/doi/10.1128/...
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Expression of mecA increases daptomycin tolerance in Staphylococcus aureus | mBio
The incidence of Staphylococcus aureus bacteremia is on a steady incline in many parts of the world. Given the associated mortality rates have changed little in the last 10 years, this is a major heal...
https://journals.asm.org/doi/10.1128/mbio.02250-25
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Awesome story!
add a skeleton here at some point
2 months ago
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(not) Imran Khan
Judith Behnsen
2 months ago
Excited to share our new publication, out today in Nature!
www.nature.com/articles/s41...
.
@kanchanj.bsky.social
led this fascinating fungal-bacterial interaction project. We are grateful for our wonderful collaborators Brian Peters and David Underhill.
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Commensal yeast promotes Salmonella Typhimurium virulence - Nature
Commensal Candida albicans enhances the virulence and dissemination of Salmonella enterica subsp. enterica serovar Typhimurium.
https://www.nature.com/articles/s41586-025-09415-y
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Great work from Nathan and the team!
add a skeleton here at some point
2 months ago
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Andy Edwards
3 months ago
New preprint from the lab, in collaboration with Ed Tate, Nate Traaseth and many others!
www.biorxiv.org/content/10.1...
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Small molecule inhibitors of the NorA multidrug efflux pump potentiate antibiotic activity by binding the outward-open conformation
Antibiotic resistance is among the greatest threats of the modern era. Multidrug efflux pumps expel antibiotics from bacterial cells and present a particular challenge by conferring resistance to a br...
https://www.biorxiv.org/content/10.1101/2025.08.19.671038v1
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Also proud to see some work from my friends (and former labmates!) Naz and Lucy published today! Very cool insights into the importance of nucleotide signalling in S. aureus infection. Congrats to
@corrigar.bsky.social
and all the authors on this cool work :)
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Determining the importance of the stringent response for methicillin-resistant Staphylococcus aureus virulence in vivo - PubMed
The stringent response is a stress signalling pathway with links to bacterial virulence. This pathway is controlled by the nucleotide alarmone (p)ppGpp, produced in Staphylococcus aureus by three synt...
https://pubmed.ncbi.nlm.nih.gov/40795378/
3 months ago
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Great to see Sigurbjorn's work on polyamine transport out now in Nature! Great work from a great scientist
www.nature.com/articles/s41...
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SLC45A4 is a pain gene encoding a neuronal polyamine transporter - Nature
The SLC45A4 gene encodes a neuronal polyamine transporter and is linked to pain response in humans and mice.
https://www.nature.com/articles/s41586-025-09326-y
3 months ago
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Chris Mulligan
3 months ago
Really pleased to share some recent work from our lab now published in Comms Bio. Here, weโve identified and characterised a peculiar TRAP transporter binding protein from B. pertussis that we think uses a membrane component from a completely different transporter family.
rdcu.be/eAr8v
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A new class of binding-protein dependent solute transporter exemplified by the TAXI-GltS system from Bordetella pertussis
Communications Biology - Identification and characterization of an unusual tri-domain TRAP transporter binding protein from Bordetella pertussis reveals insight into the diversity of binding...
https://rdcu.be/eAr8v
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(not) Imran Khan
Nature Microbiology
3 months ago
Out now! ๐ซ๐ฆ A defined microbial community reproduces attributes of fine flavour
#chocolate
fermentation By Gabriel Castrillo, David Salt & co
#microsky
#microbiomesky
๐งช Read it here:
www.nature.com/articles/s41...
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A defined microbial community reproduces attributes of fine flavour chocolate fermentation - Nature Microbiology
An in-depth microbiological and metagenomic analysis of Colombian farm and fermentation facilities resulted in the design of a defined microbial community that can reproduce the flavour of fine chocol...
https://www.nature.com/articles/s41564-025-02077-6
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reposted by
(not) Imran Khan
Kranzusch Lab
3 months ago
www.nature.com/articles/s41...
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Characterization of an amyloid-based antiphage defence system in Escherichia coli - Nature Microbiology
Prion-like proteins in Escherichia coli trigger an abortive infection mechanism in response to phage infectionโa process similar to amyloid-mediated immune signalling in fungi and animals.
https://www.nature.com/articles/s41564-025-02074-9
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(not) Imran Khan
Gavin Thomas (he/him)
3 months ago
A cool use of DALI/FoldSeek building on new human HG-SNAT protein enabled Bethan Kinniment-Williams & co., to structural unify the TmAT superfamily of membrane-bound acyltransferases first proposed by Milton Saier Jnr in TCDB.
@jnb-lab.bsky.social
www.jbc.org/article/S002...
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Structural unification of diverse transmembrane acyltransferases reveals a conserved fold for the Transmembrane Acyl Transferase (TmAT) superfamily
The movement of acyl groups across biological membranes is essential for many cellular processes. One major family of proteins catalysing this reaction are the acyl transferase family 3 (AT3) proteins...
https://www.jbc.org/article/S0021-9258(25)02397-X/fulltext
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Very important new paper regarding amino acid acquisition inside staph-infected macrophages! Key role for BCAAs + nice evidence that host cell nutrients can be conveyed to bacteria in the phagosome to facilitate growth... Big implications for host-path interactions. Great work!
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Inactivation of branched-chain amino acid uptake halts Staphylococcus aureus growth and induces bacterial quiescence within macrophages
Author summary Staphylococcus aureus is a prominent human pathogen causing acute and chronic disease. It is facultatively intracellular and can reside within many host cell types, including profession...
https://journals.plos.org/plospathogens/article?id=10.1371/journal.ppat.1013291#ppat.1013291.ref069
3 months ago
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reposted by
(not) Imran Khan
bioRxiv Microbiology
3 months ago
A single transcriptional regulator is crucial for the adaptation of Staphylococcus aureus to diverse niches
https://www.biorxiv.org/content/10.1101/2025.08.01.668060v1
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Tania Wong
3 months ago
Pleased to share our latest study
@natcomms.nature.com
! We show that the host metabolites fumarate and itaconate impose selective pressure on Staphylococcus aureus, driving its adaptation via the enzyme FumC. Grateful to all who contributed to this work!
www.nature.com/articles/s41...
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Regulation of airway fumarate by host and pathogen promotes Staphylococcus aureus pneumonia - Nature Communications
This study reveals how the pathogen Staphylococcus aureus adapts to the lung microenvironment, rich in host metabolites fumarate and itaconate, by using a key enzyme, FumC, to support its metabolic fi...
https://www.nature.com/articles/s41467-025-62453-y
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Exciting new paper from Wonsik Lee's group in Korea, using TnSeq to study gene essentiality in various intracellular and extracellular infection niches of S aureus. Loads of cool insights into metabolism and nutrient acquisition in the host
www.nature.com/articles/s41...
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Environmental cues in different host niches shape the survival fitness of Staphylococcus aureus - Nature Communications
Staphylococcus aureus adapts to diverse host environments during infection. Here, the authors use transposon sequencing to reveal niche-specific genes and identify 27 core genes required for S. aureus...
https://www.nature.com/articles/s41467-025-62292-x
3 months ago
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Just seen this very clever paper from Alex O'Neill's group at Leeds. Systematic approaches to identify routes of antibiotic uptake in S. aureus and E. coli! As someone who never believed the dogma of passive diffusion, I feel very vindicated..
pubmed.ncbi.nlm.nih.gov/40631918/
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Carrier-mediated transport as a common route of antibiotic ingress into bacteria - PubMed
Increasing antibiotic resistance among pathogenic bacteria is undermining our ability to treat infection, and new antibacterial drugs are urgently needed to address the problem. One of the most signif...
https://pubmed.ncbi.nlm.nih.gov/40631918/
4 months ago
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reposted by
(not) Imran Khan
bioRxivpreprint
6 months ago
Commensal to pathogen switch in Streptococcus pneumoniae is governed by a thermosensing master regulator
https://www.biorxiv.org/content/10.1101/2025.05.23.655729v1
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Jan-Willem Veening
6 months ago
Cool work by the group of Natalia Korotkova demonstrating glycosylation of some of our favorite proteins like PBP1a, MapZ and RodZ!
www.nature.com/articles/s41...
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Glycosylation of serine/threonine-rich intrinsically disordered regions of membrane-associated proteins in streptococci - Nature Communications
Here, the authors identify mechanisms of glycosylation of intrinsically disordered regions present in streptococci membrane proteins, uncovering a functional role for glycosylation in Streptococcus mu...
https://www.nature.com/articles/s41467-025-58692-8
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reposted by
(not) Imran Khan
bioRxiv Microbiology
6 months ago
Competition with Pseudomonas aeruginosa induces Staphylococcus aureus in an antibiotic-tolerant viable but non culturable state
https://www.biorxiv.org/content/10.1101/2025.04.30.651255v1
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(not) Imran Khan
Willem van Schaik
7 months ago
This is fascinating, but also terrible news regarding antimicrobial resistance in multidrug-resistant Gram-positives 'Emergence of transferable daptomycin resistance in Gram-positive bacteria'
www.nature.com/articles/s44...
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Emergence of transferable daptomycin resistance in Gram-positive bacteria - npj Antimicrobials and Resistance
npj Antimicrobials and Resistance - Emergence of transferable daptomycin resistance in Gram-positive bacteria
https://www.nature.com/articles/s44259-025-00109-z
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reposted by
(not) Imran Khan
ttsukaza
7 months ago
Just posted on bioRxiv! We reveal the structure of the MurJ/LysM (JM) complex. A small phage protein, LysM (37 residues), binds to MurJ like a wedge and freezes its motion.
www.biorxiv.org/content/10.1...
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Great to see this exciting work from Javeria, Rory and Reyme finally out there for people to see :) such a nice, clean story
add a skeleton here at some point
7 months ago
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Couldn't be happier to announce I'm officially PhDone! Huge shout-out to Gavin and Marjan for their encouragement and all their support over the years :)
add a skeleton here at some point
8 months ago
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reposted by
(not) Imran Khan
bioRxiv Microbiology
8 months ago
Pyrimidine sufficiency is required for Sae two-component system signaling in Staphylococcus aureus
https://www.biorxiv.org/content/10.1101/2025.03.20.644390v1
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(not) Imran Khan
bioRxiv Microbiology
8 months ago
Bacteriophage-derived endolysins restore antibiotic susceptibility in penicillin- and erythromycin-resistant Streptococcus pneumoniae infections
https://www.biorxiv.org/content/10.1101/2025.03.18.644011v1
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แฏIแTOแ แIแET, แฐแช
8 months ago
Wow! surprising new cell-intrinsic innate immune function in ๐๐๐๐๐๐ PROTEOSOMES generate antimicrobial peptides that kill bacteria as a first line of defense bacterial infection alters proteasome function to boost this protective activity are proteosomes a novel target for antimicrobial therapy?
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Cell-autonomous innate immunity by proteasome-derived defence peptides - Nature
Proteasomal degradation of cellular proteins generate defence peptides constitutively and in response to bacterial infection. Such peptides might provide a source of natural antibiotics that...
https://www.nature.com/articles/s41586-025-08615-w
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Fascinating work!
add a skeleton here at some point
9 months ago
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Preprint alert! Peptides are everywhere in biological environments, and these molecules serve as a rich source of nutrients for bacteria. Here, we uncover how one transporter protein allows S. aureus to utilise 100+ peptides for growth
www.biorxiv.org/content/10.1...
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Distinct roles for the Staphylococcus aureus POT transporter DtpT in di/tripeptide uptake and glutathione utilisation inside human macrophages
Peptides available in biological niches inhabited by the human pathogen Staphylococcus aureus serve as a rich source of amino acids required for growth and successful host colonisation. Uptake of pept...
https://www.biorxiv.org/content/10.1101/2024.12.02.626324v1
11 months ago
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Bittersweet moment as I set off from York. Lots of good times spent in good company. Some very cool science, too (at least I think it is). Keep an eye out for something soon ๐
add a skeleton here at some point
12 months ago
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Very excited to announce I'll be moving over to Cork next year to join Prof Ruth Massey as a Postdoc at
@ucc.bsky.social
:) Working with some very clever people to unravel the secrets of Staphylococcal blood infections ๐ฆ Can't wait for loads of exciting science! See you there ๐ฎ๐ช
12 months ago
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