Bavarian Center for Biomolecular Mass Spectrometry

@baybioms.bsky.social

Bayerisches Zentrum für Biomolekulare Massenspektrometrie | TUM School of Life Sciences | Proteomics | Metabolomics | Bioinformatics | 🇩🇪

Happy to see this collaborative work out in @newphyt.bsky.social! 📖 Our lab provided #Proteomics and #MassSpectrometry insights to help characterize how powdery mildew fungi exploit the host plant's own RALF peptide signaling pathway during infection.

Genc Haliti@genc-haliti.bsky.social · 2mo ago

Excited to share our latest collaborative paper, recently published in @newphyt.bsky.social! 🌿 How do powdery mildew fungi successfully colonize plants? It turns out they don't bring their own toolkit - they hijack the plant's. Read the full study here 🔗 nph.onlinelibrary.wiley.com/doi/10.1111/...

The study reveals that powdery mildew pathogens exploit the host's endogenous RALF peptide signaling pathway - mediated by the receptor kinase FERONIA (FER) - to create the right conditions for infection.

Rather than producing RALF mimics themselves (as some other pathogens do), powdery mildew fungi rely entirely on the plant's own RALFs to modulate apoplastic pH and remodel the cell wall in ways that favor their colonization.

This work highlights a new, potentially broadly relevant mechanism of susceptibility in biotrophic fungi, with exciting implications for durable disease resistance strategies in crops. A big thank you to all the co-authors for the great collaboration!

Check out our latest collaborative work with Prof. Martin Stegmann! A new PRM-based #targeted #proteomics study led by our Head of Proteomics Dr. Christina Ludwig together with doctoral candidate Genc Haliti @genc-haliti.bsky.social.

Genc Haliti@genc-haliti.bsky.social · 9mo ago

🥳 Thrilled to share my first paper contribution as co-author, published recently in @plos.org #Pathogens, an interdisciplinary collaboration driving discovery in #plant #immunity!

🎉 #BayBioMS turns 10! 🎉 Next week, we’re celebrating #10years! A decade of cutting-edge #MassSpectrometry. It’s an occasion not to be missed! We look forward to celebrating with you! 🧪🎈 #TeamMassSpec #Proteomics #Metabolomics #Bioinformatics

Bavarian Center for Biomolecular Mass Spectrometry@baybioms.bsky.social · 10mo ago

🧵(1/7) 🎉 #BayBioMS turns 10! 🎉 2025 marks our 10th anniversary of Mapping Molecular Mountains. (Final reminder for next week's big anniversary & many thanks to the extended list of new sponsors.)

Excited our paper is out in Cell @cp-cell.bsky.social! 🧬⚡ DNA photo-crosslinking proteomics in living cells 🎯 Pinpoints protein-DNA interactions to single amino acids 🌎 Globally quantifies DNA binding for >1800 proteins at a timescale of minutes 🔗 www.cell.com/cell/fulltex... 🧵

The human proteome with direct physical access to DNA

Zero-distance photo-crosslinking reveals direct protein-DNA interactions in living cells, enabling quantitative analysis of the DNA-interacting proteome on a timescale of minutes with single-amino-aci...

cell.com

UV crosslinking works great for protein-RNA complexes, but DNA is much less photo-reactive and photo-crosslinking not commonly used. Analogous, we find that the photo-activatable nucleotide 4ST (DNA) is about ten times less reactive than the commonly used 4SU (RNA). (1/n)

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Unlike natural DNA, 4ST can be activated by wavelengths far outside the absorption range of most natural biomolecules. This avoids photodamage, allowing us to use high-power LEDs, with ~1000-fold higher intensity than conventional bulbs, for activating 4ST in living cells (www.uven.org). (2/n)

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XDNAX extracts are very clean and we discover previously elusive peptide-DNA crosslinks within them. They pinpoint protein-DNA interaction sites to individual amino acids. (4/n)

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In contrast to formaldehyde crosslinking, photo-crosslinking only captures direct interactions (‘zero-distance’). The proteins we find in close proximity to DNA show very high degrees of intrinsic disorder. In fact, intrinsic disorder rises the closer proteins localize to DNA. (5/n)

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