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2017 (2)
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4 documents, page 1 of 1

Venomics of Remipede Crustaceans Reveals Novel Peptide Diversity and Illuminates the Venom’s Biological Role

von Reumont, Björn M.; Undheim, Eivind A. B.; Jauss, Robin-Tobias; Jenner, Ronald A. (2017)
Projects: ARC | Discovery Early Career Researcher Award - Grant ID: DE160101142 (DE160101142)
We report the first integrated proteomic and transcriptomic investigation of a crustacean venom. Remipede crustaceans are the venomous sister group of hexapods, and the venom glands of the remipede Xibalbanus tulumensis express a considerably more complex cocktail of proteins and peptides than previously thought. We identified 32 venom protein families, including 13 novel peptide families that we name xibalbins, four of which lack similarities to any known structural class. Our proteomic data...

True Lies: Using Proteomics to Assess the Accuracy of Transcriptome-Based Venomics in Centipedes Uncovers False Positives and Reveals Startling Intraspecific Variation in Scolopendra subspinipes

Centipede venoms have emerged as a rich source of novel bioactive compounds. However, most centipede species are commonly considered too small for venom extraction and transcriptomics is likely to be an attractive way of probing the molecular diversity of these venoms. Examining the venom composition of Scolopendra subspinipes, we test the accuracy of this approach. We compared the proteomically determined venom profile with four common toxin transcriptomic toxin annotation approaches: BLAST ...

A Dipteran’s Novel Sucker Punch: Evolution of Arthropod Atypical Venom with a Neurotoxic Component in Robber Flies (Asilidae, Diptera)

Stephan Holger Drukewitz; Nico Fuhrmann; Eivind A. B. Undheim; Alexander Blanke; Julien Giribaldi; Rosanna Mary; Guillaume Laconde; Sébastien Dutertre; Björn Marcus von Reumont (2018)
Projects: EC | MECH-EVO-INSECT (754290), ARC | Discovery Early Career Researcher Award - Grant ID: DE160101142 (DE160101142)
Predatory robber flies (Diptera, Asilidae) have been suspected to be venomous due to their ability to overpower well-defended prey. However, details of their venom composition and toxin arsenal remained unknown. Here, we provide a detailed characterization of the venom system of robber flies through the application of comparative transcriptomics, proteomics and functional morphology. Our results reveal asilid venoms to be dominated by peptides and non-enzymatic proteins, and that the majority...

Comparative analyses of glycerotoxin expression unveil a novel structural organization of the bloodworm venom system

Background We present the first molecular characterization of glycerotoxin (GLTx), a potent neurotoxin found in the venom of the bloodworm Glycera tridactyla (Glyceridae, Annelida). Within the animal kingdom, GLTx shows a unique mode of action as it can specifically up-regulate the activity of Cav2.2 channels (N-type) in a reversible manner. The lack of sequence information has so far hampered a detailed understanding of its mode of action. Results Our analyses reveal three ~3.8 kb GLTx full-...