Marnix Medema

@marnixmedema.bsky.social

Professor of Bioinformatics at Wageningen University and Leiden University. Natural product discovery, microbiomes, method development.

The MIBiG 5.0 Annotathon is coming soon, and registration is now open! 🧬 Does your research involve biosynthetic gene clusters? Do you love natural product biosynthesis? Do you have an interest in rare & exotic enzymes? We can use your help & expertise. Register here 👉 forms.gle/C1cWcLHtrjT2...

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Welcome to the Bluesky page for the Avalon Lab! Currently located at UC Irvine, we explore marine natural products in pursuit of discovering novel neurotherapeutics. Keep up with our lab through our social media posts! Learn more about the Avalon Lab through the Linktree in our bio :)

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I am delighted and feel honored to be appointed as chair of Bioinformatics at @w-u-r.bsky.social . I look forward to working with the team and with our collaborators worldwide on keeping bioinformatics science and education flourishing at WUR and beyond. www.wur.nl/en/news/marn...

Marnix Medema appointed chair of Bioinformatics at WUR

Marnix Medema has been appointed Chair of the Bioinformatics Group at Wageningen University & Research as of 1 February. He aims to further strengthen bioinformatics as a connecting discipline within ...

wur.nl

Now available online: the new 2.0 version of gutSMASH, with capabilities to detect 12 new types of catabolic gene clusters relevant to gut microbiome ecology, as well as predictions of their regulation through transcription factor binding site detection. www.sciencedirect.com/science/arti...

gutSMASH 2.0: Extended Identification of Primary Metabolic Gene Clusters From the Human Gut Microbiota

Microbiota-derived metabolites serve as key messengers mediating host–microbe and microbe–microbe interactions, often through specialized primary meta…

sciencedirect.com

Now out in @asm.org #mSystems! journals.asm.org/doi/10.1128/... Congratulations to Robert and thanks to all collaborators. See thread below for a summary of the work, exploring the use of cross-species coexpression analyses to predict primary and secondary metabolic interactions in microbiomes.

Using cross-species co-expression to predict metabolic interactions in microbiomes | mSystems

An improved mechanistic understanding of microbial interactions can guide targeted interventions or inform the rational design of microbial communities to optimize them for applications such as pathog...

journals.asm.org

Marnix Medema@marnixmedema.bsky.social · 11mo ago

New preprint out by #RobertKoetsier, the first of his PhD project, on assessing the use of cross-species coexpression analysis to identify primary and secondary metabolic interactions in microbiomes: www.biorxiv.org/content/10.1...

Happy to share our newest manuscript about the discovery and hererologous expression of metanodin, a new lassopeptide with unprecedented structural features directly from soil metagenomes. pubs.acs.org/doi/full/10.... #secmet #lassopeptides #syntheticbiology

Discovery and Heterologous Expression of the Soil Metagenome-Derived Lasso Peptide Metanodin with an Unprecedented Ring Structure

Culture-independent metagenomic approaches have proven to be effective tools for identifying previously hidden biosynthetic gene clusters (BGCs) encoding novel natural products with potential medical relevance. However, producing these compounds remains challenging as metagenomic BGCs often originate from organisms phylogenetically distant from available heterologous hosts. Lasso peptides, a subclass of ribosomally synthesized and post-translationally modified peptide (RiPP) natural products, exhibit diverse bioactivities, yet no lasso peptide has previously been discovered directly from a metagenome. Here, we report the discovery and heterologous expression of the first soil metagenome-derived lasso peptide. Expression of its biosynthetic gene cluster in Escherichia coli, followed by mass spectrometry analysis, strongly supported the predicted amino acid sequence and lasso structure of the peptide. Notably, this lasso peptide is the first to feature asparagine as the ring-forming residue at position one. Taxonomic analysis of the corresponding BGC identified an uncultivated member of the Steroidobacterales family (Gammaproteobacteria) as the closest known relative of the potential native host. These findings underscore the potential of metagenomic genome mining to reveal structurally novel RiPPs and to expand our understanding of the natural diversity of lasso peptides.

pubs.acs.org