Abstract
The linear dsDNA plasmids, pGKL1 (8.9 kb) and pGKL2 (13.4 kb) discovered in Kluyveromyces lactis, confer killer and immunity characteristics upon various yeast strains. We have devised an immunity assay and have been able to show the expression of an immunity phenotype in the K. lactis transformants harbouring conventional circular plasmids which contain DNA fragments of pGKL1. Using this expression system, the immunity determinant on pGKL1 was identified as ORF5. In addition, the presence of pGKL2 was proved to be essential for the expression of the immunity phenotype. This is the first demonstration of this new pGKL2 function, as distinct from its known functions for the replication and maintenance of pGKL1 in yeast cells.
MeSH Terms
DNA Restriction Enzymes
DNA, Fungal/genetics
Fungal Proteins/genetics
Killer Factors, Yeast
Kluyveromyces/genetics,immunology
Mycotoxins/genetics
Plasmids
RNA, Double-Stranded/genetics
Saccharomycetales/genetics
Chemicals
DNA, Fungal
Fungal Proteins
Killer Factors, Yeast
Mycotoxins
RNA, Double-Stranded
DNA Restriction Enzymes
Authors & Affiliations
3 authors, click to expand affiliations / ORCID
Tokunaga M
Wada N
Hishinuma F
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