Sign in

Patrycja Kozik

@patrycja-kozik.bsky.social
394 followers 158 following 13 posts

Cell biologist and immunologist. Group Leader at MRC LMB @mrclmb.bsky.social 🧪 Dendritic cells, antigen presentation, endocytic escape

PostsRepliesMedia
Reposted by Patrycja Kozik
The EMBO Journal @embojournal.org · 25/08/2026
How are perforin-2 immune functions in attacking bacteria & in antigen cross-presentation coordinated? @patrycja-kozik.bsky.social et al find its extensive proteolytic processing, but antigen trafficking in dendritic cells selectively requires the full-length form link.springer.com/article/10.1...
link.springer.com
Anchoring of perforin-2 via the transmembrane domain is required for antigen escape into the cytosol - The EMBO Journal
Perforin-2 is a pore-forming protein localised to the endocytic compartments of dendritic cells and macrophages. It is reported to perform two distinct functions during immune responses: attacking int...
043
Reposted by Patrycja Kozik
Caetano Reis e Sousa @reisesousalab.bsky.social · 02/01/2026
Absolutely delighted that our latest paper is out today @natimmunol.nature.com. It has taken five years to uncover a role for cross-presentation in shaping the immune visibility of tumour antigens. A labour of love led by @drjonlim.bsky.social and Oliver Schulz. Great start of 2026!
0269
Reposted by Patrycja Kozik
Equinox Graphics @e-nox.net · 24/12/2025
Day 24 of making proteins for #ArtAdventCalendar The nuclear pore complex is a huge pore made of hundreds of proteins, that allows the flow of nucleic acids and proteins between the nucleus and cytoplasm. It also looks like a wreath! Merry Christmas! More projects: e-nox.net/portfolio/ #SciArt
Visualisation of the inner part of the human nuclear pore, with the inner part of the ring in green, and the outer part highlighted in red, to look like a Christmas wreath
0116
Reposted by Patrycja Kozik
Allegretti Lab @matteoall.bsky.social · 19/12/2025
We are thrilled to share our new pre-print on the molecular anatomy of nuclear proteasome in human sperm cells! #In-cellcryo-ET + #SPA + #LM! @piotrkolata.bsky.social @a-dsantos.bsky.social, @tomdendooven.bsky.social!! doi.org/10.64898/202...
38921
Reposted by Patrycja Kozik
Yamuna Krishnan @krishnanyamuna.bsky.social · 17/12/2025
Organelles do NOT have a single uniform pH. And if you think they must, because “protons diffuse fast,” this paper is for you. A thread on why that assumption is wrong; and what we found instead. 🧵 1/n
29547230
Reposted by Patrycja Kozik
Gal Haimovich ☣ 🧪🔬🎗 @grnfluoresceblg.bsky.social · 17/12/2025
My "News & views" was published today @natmethods.nature.com Thanks @ritastrack.bsky.social for the invitation to write it and Allison Doerr for the editing after Rita left... www.nature.com/articles/s41...
nature.com
Targeted RNA-binding protein degradation to improve mRNA live imaging in animal cells - Nature Methods
The gold standard system for mRNA imaging in live cells just got upgraded by being degraded. This development improves signal-to-noise ratios and may lead to a better understanding of mRNA transport a...
13614
Reposted by Patrycja Kozik
Michela Locci @michelalocci.bsky.social · 16/12/2025
I am excited to share that our work, in which we have dissected the signals driven by the nucleoside-modified mRNA and LNP components of mRNA vaccines that regulate germinal center (GC) responses, is now published in Cell! www.cell.com/cell/fulltex...
cell.com
Distinct components of mRNA vaccines cooperate to instruct efficient germinal center responses
This study dissects the individual contributions of the different components of mRNA vaccines to immune responses. Nucleoside-modified mRNA promotes the production of type I interferons that act on de...
54919
Reposted by Patrycja Kozik
Fletcher Lab @fletcherlabucb.bsky.social · 15/12/2025
How does a macrophage decide to eat or simply nibble? Check out our latest paper! You can also read this nice review. Congrats Caitlin for leading this amazing work! www.nature.com/articles/s41... www.nature.com/articles/s41...
nature.com
Target cell cortical tension regulates macrophage trogocytosis - Nature Cell Biology
Cornell et al. show that target cells with low cortical tension induce macrophages to preferentially trogocytose, or engulf in small fragments, whereas target cells with high cortical tension tend tow...
13416
Reposted by Patrycja Kozik
Equinox Graphics @e-nox.net · 06/12/2025
Day 6 of making proteins for #ArtAdventCalendar This is a "nanodisc", which is a tiny section of lipid membrane, just big enough to hold a single membrane-bound protein, and holds the structure stable enough to probe its structure More projects: e-nox.net/portfolio/ #SciArt
Visualisation of a membrane-bound protein (green) in a nanodisc, which is a tiny section of lipid membrane (clear), and you can see the two stabilising bands (pink/purple) that go around the disc
0217
Reposted by Patrycja Kozik
Matthias Trost @mtrost.bsky.social · 15/12/2025
I have a PhD position available with start date September 2026 at the University of Manchester. Proteomics analysis of flow cytometry-based isolated pathogen-containing phagosomes Due to funding requirements, this position is for UK home students only. www.findaphd.com/phds/project...
findaphd.com
Proteomics analysis of flow cytometry-based isolated pathogen-containing phagosomes at The University of Manchester on FindAPhD.com
PhD Project - Proteomics analysis of flow cytometry-based isolated pathogen-containing phagosomes at The University of Manchester, listed on FindAPhD.com
11312
Reposted by Patrycja Kozik
Ana Tufegdzic Vidakovic @anatv.bsky.social · 09/12/2025
Happy to share a new preprint from our lab, uncovering "spooky action at a distance" - for RNA Polymerase II: www.biorxiv.org/content/10.6...
biorxiv.org
Stalling of elongating Pol II triggers Ser7 phosphorylation in trans to drive transcription recovery
DNA is scattered with obstacles that stall RNA polymerase II (Pol II) and block the production of full-length transcripts. Two mechanisms are known to resolve stalled Pol II: transcription-coupled nuc...
12811
Reposted by Patrycja Kozik
Institut Pasteur | 130 years of biomedical research @pasteur.fr · 08/12/2025
🔬 Call to create junior research groups at the Institut Pasteur Focus: Infectious diseases, host-microbe interactions, vaccines Special interest: AI methodologies 📅 Deadline: Feb 9, 2026 👥 2-12 years post-PhD Apply now 📝 research.pasteur.fr/en/call/crea... #JobOpportunity #Research
research.pasteur.fr
Creation of new junior research groups at the Institut Pasteur - Call for applications 2026 - Research
The Institut Pasteur is launching an international call to recruit new junior research group leaders leveraging cutting-edge transdisciplinary approaches to exploring infectious diseases, host-microbe...
199136
Patrycja Kozik @patrycja-kozik.bsky.social · 11/12/2025
Time for a new pre-print! How do dendritic cells control pore formation in their own endocytic compartments? Our work shows that the unique transmembrane anchor of perforin-2 does not protect DC membranes, but instead it enables antigen escape during cross-presentation doi.org/10.64898/202...
Pre-pore and cis pores formed by full length perforin-2 during antigen escape from early phagosomes
0158
Reposted by Patrycja Kozik
EMBO @embo.org · 10/12/2025
The EMBO Gold Medal 2025 was awarded to Tanmay Bharat and David Bikard: www.embo.org/press-releases/embo-go… 🧪 At #CellBio2025, the EMBO Gold Medal was handed over to David Bikard in recognition of his pioneering work on #GeneEditing.
86016
Reposted by Patrycja Kozik
Science Magazine @science.org · 25/11/2025
Some archaea—an ancient group of microorganisms—have an entirely novel genetic code, according to a new study in Science. The findings expand our understanding of how alternative genetic codes evolve and hint at new molecular tools for biotechnology applications. scim.ag/4omApQ7
scim.ag
An archaeal genetic code with all TAG codons as pyrrolysine
Multiple genetic codes developed during the evolution of eukaryotes and bacteria, yet no alternative genetic code is known for archaea. We used proteomics to confirm our prediction that certain archae...
29032
Reposted by Patrycja Kozik
Equinox Graphics @e-nox.net · 06/12/2025
Day 5 of making proteins for #ArtAdventCalendar Today it's HLA-A2, which is critical for the immune system. They present fragments of intra-cellular proteins to CD8+ T cells, which can initiate a targeted immune response. More projects: e-nox.net/portfolio/ #SciArt
Visualisation of the structure of HLA-A2, presenting a peptide (protein fragment). HLA-A2 is shown in blue/purple with its surface translucent and an internal ribbon showing its structure. The peptide is shown bound to a crevice in magenta.
0218
Reposted by Patrycja Kozik
James Briscoe @jamesbriscoe.bsky.social · 05/12/2025
BBC News - Top UK scientist says research visa restrictions endanger economy www.bbc.com/news/article...
bbc.com
Top UK scientist says research visa restrictions endanger economy
Prof Sir Paul Nurse says the UK is "shooting itself in the foot" with its visa system for researchers.
03222
Reposted by Patrycja Kozik
MRC Laboratory of Molecular Biology @mrclmb.ac.uk · 28/11/2025
Check out the latest paper from Leo James and William McEwan which explains the science behind LMB spin out TRIMTECH Therapeutic's TRIMTAC® degraders ⤵️
032
Reposted by Patrycja Kozik
Aligning Science Across Parkinson's @asapresearch.parkinsonsroadmap.org · 03/12/2025
🧬 CRN Team De Camilli found that BLTP3A/UHRF1BP1 binds VAMP7 vesicles to lysosomes and activates the CASM pathway after lysosome damage. This drives mATG8 recruitment and helps restore lysosome integrity. 🔗 Check out the full #publication to read more about their findings: bit.ly/4o27nF0
Activation of CASM recruits BLTP3A to the surface of damaged lysosomes through an interaction with mATG8 proteins.
011
Reposted by Patrycja Kozik
David Drubin @drubin.bsky.social · 02/12/2025
Today, our animation synthesizing decades of research on actin-mediated endocytosis in budding yeast was published: journals.biologists.com/jcs/article/... The result of a fantastic Iwasa-Drubin lab collaboration. @margotriggi.bsky.social @jiwasa.bsky.social movie.biologists.com/video/10.124...
413253
Reposted by Patrycja Kozik
Bryan Bryson @thebrysonlab.bsky.social · 20/11/2025
Happy to share our newest preprint on antigen presentation of Mtb-derived peptides on MHC-I: www.biorxiv.org/cgi/content/... This is a follow up to our previous paper where we applied immunopeptidomics to understand MHC-I presentation by Mtb-infected cells: elifesciences.org/articles/84070
biorxiv.org
1134
Reposted by Patrycja Kozik
Waggoner Lab @labwaggoner.bsky.social · 10/11/2025
GPR34 is a splenic cDC1 receptor that is required for efferocytosis and for the cross-presentation of apoptotic cell–associated antigen to CD8 T cells @jem.org rupress.org/jem/article/...
052
Reposted by Patrycja Kozik
Jonathan Kagan @jkagan1.bsky.social · 31/10/2025
An authoritative review on phagosome immunobiology by David Underhill and Kai Li. Highly recommend for anyone interested in innate immunity, antigen presentation, infection and host defense. @cedarssinai.bsky.social rdcu.be/eNIFY
rdcu.be
Phagocytosis: a process that shapes immune responses to engulfed meals
Nature Reviews Immunology - In this Review, Li and Underhill discuss recent advances in understanding the process of phagocytosis. The authors highlight how phagocytosis is integral for innate...
1328
Reposted by Patrycja Kozik
Adrian Liston @labliston.bsky.social · 28/10/2025
Pre-print alert! And this one really is a must read for anyone that does spectral #flowcytometry. It is a complete, fully-automated spectral unmixing pipeline that reduces error up to 9000-fold. Want to get a tough sample, like lung, looking like this? Read more! www.biorxiv.org/content/10.1...
49542
Reposted by Patrycja Kozik
Caetano Reis e Sousa @reisesousalab.bsky.social · 13/05/2025
Delighted that our latest paper is out @jem.org. An intriguing study led by Ana Cardoso exploring the role of DNGR-1 in mouse dendritic cell precursors.
0237
Patrycja Kozik @patrycja-kozik.bsky.social · 12/05/2025
Looking forward to meeting PFP enthusiasts at the Prato conference on Pore Forming Proteins in June! ⏰ Early Bird Registration deadline - May 16th ⏰ www.pratopores.org/speakers #PFPsky
pratopores.org
Speakers — Prato Pores
000
Reposted by Patrycja Kozik
Tim Elliott @timmunologist.bsky.social · 08/05/2025
At last, direct demonstration that tapasin dependent MHC-I molecules experience greater tapasin filtering, resulting in less diverse MHC-I immunopeptidomes that are enriched in high affinity peptide-MHC-I complexes. Well done Andy and Rachel! links.email.frontiersin.org/ls/click?upn...
links.email.frontiersin.org
Frontiers | Evidence of focusing the MHC class I immunopeptidome by tapasin
Major Histocompatibility Complex class I (MHC-I) molecules bind and present peptides to cytotoxic T cells, protecting against pathogens and cancer. MHC-I is ...
045
Reposted by Patrycja Kozik
Calum Bain @bainlab.bsky.social · 02/05/2025
Wow! Amazing response in the first few days of registration opening for www.emds2025.com Be sure to register early to avoid disappointment. 🚨 Abstract deadline is FRIDAY 30th MAY (Sneak peak of @profandrewmac.bsky.social rehearsing for the 'Scotland Experience' social.)
media.tenor.com
a group of people wearing kilts are dancing in front of a sign that says dairy
ALT: a group of people wearing kilts are dancing in front of a sign that says dairy
132
Reposted by Patrycja Kozik
The French DC Society - Club Francophone des DC (CFCD) @frenchdcsociety.bsky.social · 09/04/2025
👉 When splenic metallophilic marginal zone macrophages do antigen cross-presentation equally well as conventional DC1. Congrats to the team of Peter van Endert from @inem-necker.bsky.social for this work published in @cp-immunity.bsky.social www.cell.com/immunity/abs...
cell.com
Metallophilic marginal zone macrophages cross-prime CD8+ T cell-mediated protective immunity against blood-borne tumors
Metallophilic marginal zone macrophages are positioned strategically within the spleen to process internalized blood-borne materials. Mauvais et al. find that these CD169+ macrophages cross-prime CD8+...
053
Reposted by Patrycja Kozik
The Company of Biologists @biologists.bsky.social · 03/03/2025
Thank you to organisers Philippe Bousso, Gillian Griffiths @griffithslab.bsky.social , Milka Sarris & Michael Sixt, and everyone who joined us for our 'Immune Cell Interactions in Development, Homeostasis and Immunity' Workshop. biologists.com/workshops
Immune Cell Interactions in Development, Homeostasis and Immunity 
Fanhams Hall, Hertfordshire, UK
23-26 February 2025

Group photo
082
Reposted by Patrycja Kozik
Francesco Scavone @fscavone.bsky.social · 24/02/2025
Our work on K63-polyubiquitin in membrane trafficking is out! Check out how we use a high affinity and specific sensor for K63-polyUb to identify K63-polyubiquitylated plasma membrane proteins in clusters of vesicles containing ATG9A. Link: www.molbiolcell.org/doi/10.1091/...
molbiolcell.org
Trafficking of K63-polyubiquitin modified membrane proteins in a macroautophagy-independent pathway is linked to ATG9A | Molecular Biology of the Cell
Cytoplasmic K63-linked polyubiquitin signals have well-established roles in endocytosis and selective autophagy. However, how these signals help to direct different cargos to different intracellular t...
43013
Patrycja Kozik @patrycja-kozik.bsky.social · 22/02/2025
How to explain cross-presentation in a pub? #DendriticCells #APCsky #MHCsky
030
Reposted by Patrycja Kozik
MRC Laboratory of Molecular Biology @mrclmb.ac.uk · 23/01/2025
The LMB Rising Talent Fellowship for Black heritage scientists is open for applicants! With this 3 year postdoc position we want to enable scientists of Black heritage to learn & grow their experience. To apply and for full details check here: www2.mrc-lmb.cam.ac.uk/recruitment/...  Please share!
Apply now!
LMB Rising Talent Fellowship
3-year postdoctoral fellowship for Black heritage scientists
Visit www.mrc-lmb.cam.ac.uk for more information
01835
Reposted by Patrycja Kozik
Journal of Cell Science @jcellsci.bsky.social · 10/02/2025
Our latest ‘Cell Scientist to Watch’ interview is with Kelly Nguyen @kellythd-nguyen.bsky.social @mrclmb.bsky.social. We learn about Kelly’s career, her advice on collaborative research and her passion for martial arts. journals.biologists.com/jcs/article/...
Kelly Nguyen
0379
Reposted by Patrycja Kozik
jeffreybode.bsky.social @jeffreybode.bsky.social · 12/02/2025
It's finally out – actually out and in print! Many thanks to @jcornlab.bsky.social @matthiasmuhar.bsky.social @jakobfarnung.bsky.social and all the fantastic collaborators. What started as pure curiosity lead to an amazing find! www.nature.com/articles/s41...
nature.com
C-terminal amides mark proteins for degradation via SCF–FBXO31 - Nature
SCF–FBXO31 scans proteins for C-terminal amidation and marks them for subsequent proteasomal degradation.
07115
Reposted by Patrycja Kozik
The Guermonprez Lab at Institut Pasteur Paris @guermonprezlab.bsky.social · 12/02/2025
Interested in cellular cross-talks between dendritic cells and T lymphocytes in lung cancer? Our team is recruiting a postdoctoral associate in immunology at Institut Pasteur Paris! research.pasteur.fr/fr/job/post-...
research.pasteur.fr
Post-Doctoral position in cancer immunology and immunotherapy, Institut Pasteur, Paris, France - Research
Deciphering the role of intra-tumoral dendritic cells in the dynamic controlof CD4+ and CD8+ lymphocytes in lung cancer. A 3-year, post-doctoral position is available in the Guermonprez lab at Institu...
135
Reposted by Patrycja Kozik
Nature Reviews Cancer @natrevcancer.nature.com · 11/02/2025
Melero&Co discuss the crucial role of conventional type 1 dendritic cells in cross-presenting antigens to prime CD8+ T cells to mount anti-tumour immunity and highlight how this can be exploited for #CancerImmunotherapy @unav.edu 📖 ⬇️
nature.com
Cross-priming in cancer immunology and immunotherapy - Nature Reviews Cancer
073
Reposted by Patrycja Kozik
Brian Ferguson @viropractor.bsky.social · 11/02/2025
There is a Postdoc job available in my lab to study fundamental mechanisms of antiviral immunity, specifically in the context of viral nucleic acid sensing. Please take a look here and contact me if interested: #immunosky #virology 🧪 www.jobs.cam.ac.uk/job/50254/
jobs.cam.ac.uk
Research Assistant / Research Associate (Fixed Term) - Job Opportunities - University of Cambridge
Research Assistant / Research Associate (Fixed Term) in the Department of Pathology at the University of Cambridge.
0916
Reposted by Patrycja Kozik
Waggoner Lab @labwaggoner.bsky.social · 08/02/2025
WDFY4-dependent cross-presentation of immune complexes by cDC1 and cDC2 @jem.org doi.org/10.1084/jem....
041
Reposted by Patrycja Kozik
MRC Laboratory of Molecular Biology @mrclmb.ac.uk · 30/01/2025
Join our Structural Studies Division, leading a research group developing computational methods to address questions in molecular & cellular biology! You will be supported by core funding, excellent facilities & enthusiastic colleagues. Apply by 18 MAR www.nature.com/naturecareer...
Now hiring:
Research Group Leader
Structural Studies Division
To develop artificial intelligence/machine-learning methods to further our understanding of biology at molecular and/or cellular scales
Apply by 18th March
03634
Reposted by Patrycja Kozik
Rebsamen Lab @UNIL @rebsamenlab.bsky.social · 28/01/2025
We are excited to announce the 2nd Symposium on the Immunobiology of Pattern Recognition Receptors, Oct 1-2 2025, Lausanne, Switzerland. Registrations open March 1 - Attendance limited to 150 participants. More info: wp.unil.ch/immunobiolog... #ImmunoSky
wp.unil.ch
Symposium immunobiology
13617
Reposted by Patrycja Kozik
David Sancho @sancholab.bsky.social · 08/01/2025
📆ny resolution #immunosky: REGISTER NOW #phagocytes25 phagocytes2025.com 20 🔝speakers 28 short talks + posters 📌Madrid @CNIC_CARDIO 📆26-28 March '25 Organized by www.inmunologia.org Support by #TRR332 #TRR359 #inmunotek #EMBOevents Bursaries by @efis-immunology.bsky.social @eurjimmunol.bsky.social
1146
Reposted by Patrycja Kozik
Bryan Welm @bryanwelm.bsky.social · 24/12/2024
A cellular Christmas tree made from molten copper drops. Splats of copper sometimes happen when welding and they often take the shape of different cell types. I collect these off my shop floor because they look cool…….and yes, they make my sciency senses tingle! Merry Christmas! #SciArt
Splatters of molten copper arranged into the shape of a Christmas tree. When molten copper drops onto a hard surface they form shapes resembling different cell types.
519538
Reposted by Patrycja Kozik
Equinox Graphics @e-nox.net · 24/12/2024
MERRY CHRISTMAS!!! I'm not sure if this is how the gold, frankincense and myrrh were delivered, but perforin-2 is excellent at transporting gifts... Made in #Modo for @patrycja-kozik.bsky.social Lab #ArtAdventCalendar #SciArt More projects: e-nox.net/portfolio/
Visualisation of the perforin-2 protein in a cell membrane, allowing some wrapped-up proteins to be transported through the membrane
0296
Patrycja Kozik @patrycja-kozik.bsky.social · 18/12/2024
Just a little reminder on the important role of perforin-2 in transport... 🎁🎁🎁 🎄 Happy Christmas everyone! 🎄 Image credits: @e-nox.net #KozikLabScience #PFPsky
Perforin-2 looking like a chimney and transporting protein presents. #CrossPresentation #Christmas #Science #KozikLabScience
#PFPsky #APCsky
Equinox Graphics @e-nox.net
0161
Reposted by Patrycja Kozik
ImmuNoah's Ark (Noe Rodriguez) @immunoah.bsky.social · 12/12/2024
Calling all those talented researchers of black heritage! 📢📣🤩 Seek which research programmes call to you across the @mrclmb.bsky.social divisions, get in touch & keep an eye open for when the application process opens in Jan/Feb 2025! www2.mrc-lmb.cam.ac.uk/recruitment/...
www2.mrc-lmb.cam.ac.uk
Rising Talent Fellowship - MRC Laboratory of Molecular Biology
RISING TALENT FELLOWSHIP The MRC Laboratory of Molecular Biology (LMB) is proud to launch a new three-year fully funded postdoctoral fellowship for
0106
Patrycja Kozik @patrycja-kozik.bsky.social · 17/12/2024
News from the lab: we went skating and we all survived! Thank you to @immunoah.bsky.social for organising a joint Christmas lunch 🎄 #KozikLabMembers #KozikLabUpdates
281
Patrycja Kozik @patrycja-kozik.bsky.social · 16/12/2024
It is great to see a lot of familiar faces at #UKMT2024 in London! A big thank you to Chris Stefan and @jezcarlton.bsky.social for organising and putting together an exciting programme for the day. #KozikLabUpdates
060
Reposted by Patrycja Kozik
Sarah Cohen @cohenlaboratory.bsky.social · 11/11/2024
Ok, I made a starter pack for membrane trafficking and organelles (broadly defined). Feel free to self-nominate! go.bsky.app/RbtJjt7
7617777
Reposted by Patrycja Kozik
Rod Rahimi @rodrahimi.bsky.social · 29/11/2024
Friends, it's fun to see the #immunology community continue to grow! I created a 4th Starter Pack to help folks find each other. If you're an immunologist and you don't see yourself on the lists, let me know 🧪 go.bsky.app/PY5tCas go.bsky.app/FmERUoD go.bsky.app/6aT6qDS go.bsky.app/QSEPDoj
4012162