KTD1 is a yeast defense factor against K28 killer toxin
Andreev, I.; Giovanetti, S. M.; Urtecho, G.; Shriner, D.; Bloom, J. S.; Sadhu, M. J.
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Secreted protein toxins are widely used weapons in conflicts between organisms. Killer yeast produce killer toxins that inhibit the growth of nearby sensitive yeast. We investigated variation in resistance to the killer toxin K28 across diverse natural isolates of the Saccharomyces cerevisiae population and discovered a novel defense factor, which we named KTD1, that is an important determinant of K28 toxin resistance. KTD1 is a member of the DUP240 gene family of unknown function. We uncovered a putative role of DUP240 proteins in killer toxin defense and identified a region that is undergoing rapid evolution and is critical to KTD1s protective ability. Our findings implicate KTD1 as a key factor in the defense against killer toxin K28.
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