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A cytoplasmic gene‐shuffle system in Kluyveromyces lactis : use of epitope tagging to detect a killer plasmid‐encoded gene product
Author(s) -
Schaffrath Raffael,
Meacock Peter A.
Publication year - 1996
Publication title -
molecular microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.857
H-Index - 247
eISSN - 1365-2958
pISSN - 0950-382X
DOI - 10.1046/j.1365-2958.1996.402942.x
Subject(s) - kluyveromyces lactis , biology , plasmid , gene , gene product , kluyveromyces , epitope , yeast , genetics , recombinant dna , function (biology) , microbiology and biotechnology , saccharomyces cerevisiae , gene expression , antigen
A novel gene shuffle approach has been developed for investigating the functions of genes on the cytoplasmic linear DNA killer plasmids of Kluyveromyces lactis . By transplacing k2ORF5 from the larger plasmid pGKL2(k2) onto pGKL1(k1) we have shown this gene to be essential and functionally interchangeable between plasmids. Once transferred onto k1, k2ORF5 is fully able to complement a k2ORF5 0 deletion on k2 in trans , giving rise to yeast strains containing only the two recombinant plasmid forms. Additionally, the in vivo product of k2ORF5 has been identified as a 19.5 kDa protein by transplacing an epitope‐tagged k2ORF5 allele from k2 to k1. The ease of detection of the tagged ORF5 product in comparison to TRF1, the gene product of k2ORF10, indicates that Orf5p is one of the most abundant k2 products, implying structural rather than regulatory function.