Patrycja Kozik's Avatar

Patrycja Kozik

@patrycja-kozik

Cell biologist and immunologist. Group Leader at MRC LMB @mrclmb.bsky.social ๐Ÿงช Dendritic cells, antigen presentation, endocytic escape

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21.11.2024
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Latest posts by Patrycja Kozik @patrycja-kozik

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Postdoctoral Scientist - PNAC - Dr Patrycja Kozik - LMB 2780 - Cambridgeshire (GB) job with MRC Laboratory of Molecular Biology (LMB) | 12854641 Postdoctoral Scientist Salary ยฃ42,694 per annumย  MRC Laboratory of Molecular Biology, Cambridge, UK Applications are invited for a Postdoctoral Sci...

We have a postdoc position available in our lab at the @mrclmb.bsky.social - the project is on exploring targeted protein degradation in dendritic cells to facilitate T cell-mediated immune responses - see the link below for more information. Deadline this Monday!

www.nature.com/naturecareer...

10.03.2026 11:11 ๐Ÿ‘ 0 ๐Ÿ” 1 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

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!

02.01.2026 17:26 ๐Ÿ‘ 25 ๐Ÿ” 9 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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

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

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

24.12.2025 16:05 ๐Ÿ‘ 11 ๐Ÿ” 6 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 1
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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...

19.12.2025 08:14 ๐Ÿ‘ 87 ๐Ÿ” 21 ๐Ÿ’ฌ 3 ๐Ÿ“Œ 1

Organelles do NOT have a single uniform pH.
And if you think they must, because โ€œprotons diffuse fast,โ€ this paper is for you.
A thread on why that assumption is wrong; and what we found instead. ๐Ÿงต 1/n

17.12.2025 00:46 ๐Ÿ‘ 518 ๐Ÿ” 221 ๐Ÿ’ฌ 28 ๐Ÿ“Œ 31
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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...

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...

17.12.2025 11:12 ๐Ÿ‘ 36 ๐Ÿ” 14 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 2
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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...

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...

16.12.2025 17:39 ๐Ÿ‘ 46 ๐Ÿ” 19 ๐Ÿ’ฌ 5 ๐Ÿ“Œ 4
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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...

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...

15.12.2025 22:51 ๐Ÿ‘ 34 ๐Ÿ” 16 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 4
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

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

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

06.12.2025 18:53 ๐Ÿ‘ 21 ๐Ÿ” 7 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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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

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...

15.12.2025 12:15 ๐Ÿ‘ 13 ๐Ÿ” 12 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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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...

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...

09.12.2025 22:13 ๐Ÿ‘ 26 ๐Ÿ” 11 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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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...

๐Ÿ”ฌ Call to create junior research groups at the Institut Pasteur

Focus: Infectious diseases, host-microbe interactions, vaccines
Special interest: AI methodologies

๐Ÿ“… Deadline: Feb 9, 2026
๐Ÿ‘ฅ 2-12 years post-PhD

Apply now ๐Ÿ“ research.pasteur.fr/en/call/crea...

#JobOpportunity #Research

08.12.2025 08:53 ๐Ÿ‘ 99 ๐Ÿ” 136 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 9
Pre-pore and cis pores formed by full length perforin-2 during antigen escape from early phagosomes

Pre-pore and cis pores formed by full length perforin-2 during antigen escape from early phagosomes

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...

11.12.2025 09:21 ๐Ÿ‘ 15 ๐Ÿ” 8 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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The EMBO Gold Medal 2025 was awarded to Tanmay Bharat and David Bikard: https://www.embo.org/press-releases/embo-gold-medal-2025-awarded-to-tanmay-bharat-and-david-bikard/ ๐Ÿงช

At #CellBio2025, the EMBO Gold Medal was handed over to David Bikard in recognition of his pioneering work on #GeneEditing.

10.12.2025 13:40 ๐Ÿ‘ 60 ๐Ÿ” 16 ๐Ÿ’ฌ 8 ๐Ÿ“Œ 1
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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...

Some archaeaโ€”an ancient group of microorganismsโ€”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. https://scim.ag/4omApQ7

25.11.2025 20:24 ๐Ÿ‘ 91 ๐Ÿ” 32 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 6
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.

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.

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

06.12.2025 16:27 ๐Ÿ‘ 21 ๐Ÿ” 8 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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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.

BBC News - Top UK scientist says research visa restrictions endanger economy
www.bbc.com/news/article...

05.12.2025 06:35 ๐Ÿ‘ 33 ๐Ÿ” 22 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 2

Check out the latest paper from Leo James and William McEwan which explains the science behind LMB spin out TRIMTECH Therapeutic's TRIMTACยฎ degraders โคต๏ธ

28.11.2025 14:54 ๐Ÿ‘ 3 ๐Ÿ” 2 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Activation of CASM recruits BLTP3A to the surface of damaged lysosomes through an interaction with mATG8 proteins.

Activation of CASM recruits BLTP3A to the surface of damaged lysosomes through an interaction with mATG8 proteins.

๐Ÿงฌ 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.

๐Ÿ”— Check out the full #publication to read more about their findings: bit.ly/4o27nF0

03.12.2025 16:13 ๐Ÿ‘ 1 ๐Ÿ” 1 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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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...

02.12.2025 21:02 ๐Ÿ‘ 130 ๐Ÿ” 53 ๐Ÿ’ฌ 4 ๐Ÿ“Œ 11

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

20.11.2025 16:27 ๐Ÿ‘ 13 ๐Ÿ” 4 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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GPR34 is a splenic cDC1 receptor that is required for efferocytosis and for the cross-presentation of apoptotic cellโ€“associated antigen to CD8 T cells @jem.org
rupress.org/jem/article/...

10.11.2025 17:59 ๐Ÿ‘ 5 ๐Ÿ” 2 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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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...

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

31.10.2025 19:22 ๐Ÿ‘ 32 ๐Ÿ” 8 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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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...

28.10.2025 08:05 ๐Ÿ‘ 93 ๐Ÿ” 42 ๐Ÿ’ฌ 3 ๐Ÿ“Œ 4

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.

13.05.2025 17:41 ๐Ÿ‘ 23 ๐Ÿ” 7 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Speakers โ€” Prato Pores

Looking forward to meeting PFP enthusiasts at the Prato conference on Pore Forming Proteins in June!

โฐ Early Bird Registration deadline - May 16th โฐ

www.pratopores.org/speakers

#PFPsky

12.05.2025 08:17 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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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 ...

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...

08.05.2025 06:34 ๐Ÿ‘ 4 ๐Ÿ” 5 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Wow! Amazing response in the first few days of registration opening for www.emds2025.com

Be sure to register early to avoid disappointment.

๐Ÿšจ Abstract deadline is FRIDAY 30th MAY

(Sneak peak of @profandrewmac.bsky.social rehearsing for the 'Scotland Experience' social.)

02.05.2025 12:34 ๐Ÿ‘ 4 ๐Ÿ” 2 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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Metallophilic marginal zone macrophages cross-prime CD8+ Tย 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 etย al. find that these CD169+ macrophages cross-prime CD8+...

๐Ÿ‘‰ 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...

09.04.2025 09:10 ๐Ÿ‘ 5 ๐Ÿ” 3 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 1
Immune Cell Interactions in Development, Homeostasis and Immunity 
Fanhams Hall, Hertfordshire, UK
23-26 February 2025

Group photo

Immune Cell Interactions in Development, Homeostasis and Immunity Fanhams Hall, Hertfordshire, UK 23-26 February 2025 Group photo

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

03.03.2025 16:21 ๐Ÿ‘ 8 ๐Ÿ” 2 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0