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A family of lethal exotoxins defined by cell entry via the Attractin receptor
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A family of lethal exotoxins defined by cell entry via the Attractin receptor
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Journal Article
A family of lethal exotoxins defined by cell entry via the Attractin receptor
2025
Overview
Although bacterial genomes encode numerous potential toxins, it is unclear how evolution drives the specificity of these important virulence factors. Using an insect CRISPR screen, we identified the transmembrane protein Attractin (ATRN) as the receptor for Nigritoxin (Ntx), a Vibrio toxin that causes seasonal shrimp pandemics. We found that Ntx's effector \"warhead\" inhibits translation via a previously uncharacterized mechanism. Moreover, we show that two related toxins require ATRN for entry but possess unrelated effector domains. One has a Rho-GTPase AMPylation function and the other an actin-targeting/proteolysis function. Our findings reveal the mechanism of Ntx entry and toxicity and show that the ATRN-targeting domain can deliver disparate effector domains, strongly indicating that this class of exotoxins can evolve as modular proteins using a common entry domain.
Publisher
Cold Spring Harbor Laboratory,Cold Spring Harbor Laboratory Preprints
Subject
