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Discovery of a rapidly evolving yeast defense factor, KTD1, against the secreted killer toxin K28.

ABSTRACT: Secreted protein toxins are widely used weapons in conflicts between organisms. Elucidating how organisms genetically adapt to defend themselves against these toxins is fundamental to understanding the coevolutionary dynamics of competing organisms. Within yeast communities, "killer" toxins are secreted to kill nearby sensitive yeast, providing a fitness advantage in competitive growth environments. Natural yeast isolates vary in their sensitivity to these toxins, but to date, no polymorphic genetic factors contributing to defense have been identified. We investigated the variation in resistance to the killer toxin K28 across diverse natural isolates of the Saccharomyces cerevisiae population. Using large-scale linkage mapping, we discovered a novel defense factor, which we named KTD1. We identified many KTD1 alleles, which provided different levels of K28 resistance. KTD1 is a member of the DUP240 gene family of unknown function, which is rapidly evolving in a region spanning its two encoded transmembrane helices. We found that this domain is critical to KTD1's protective ability. Our findings implicate KTD1 as a key polymorphic factor in the defense against K28 toxin.

SUBMITTER: Andreev I

PROVIDER: S-EPMC9974470 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature

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Discovery of a rapidly evolving yeast defense factor, <i>KTD1</i>, against the secreted killer toxin K28.

Andreev Ilya I Laidlaw Kamilla M E KME Giovanetti Simone M SM Urtecho Guillaume G Shriner Daniel D Bloom Joshua S JS MacDonald Chris C Sadhu Meru J MJ

Proceedings of the National Academy of Sciences of the United States of America 20230217 8

Secreted protein toxins are widely used weapons in conflicts between organisms. Elucidating how organisms genetically adapt to defend themselves against these toxins is fundamental to understanding the coevolutionary dynamics of competing organisms. Within yeast communities, "killer" toxins are secreted to kill nearby sensitive yeast, providing a fitness advantage in competitive growth environments. Natural yeast isolates vary in their sensitivity to these toxins, but to date, no polymorphic gen ...[more]

PMID: 36800387

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Dataset Information

Discovery of a rapidly evolving yeast defense factor, KTD1, against the secreted killer toxin K28.

Publications

Discovery of a rapidly evolving yeast defense factor, <i>KTD1</i>, against the secreted killer toxin K28.

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Discovery of a rapidly evolving yeast defense factor, KTD1, against the secreted killer toxin K28.

Publications

Discovery of a rapidly evolving yeast defense factor, &lt;i&gt;KTD1&lt;/i&gt;, against the secreted killer toxin K28.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

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Discovery of a rapidly evolving yeast defense factor, <i>KTD1</i>, against the secreted killer toxin K28.