Reference: Goto K, et al. (1991) Cloning and nucleotide sequence of the KHS killer gene of Saccharomyces cerevisiae. Agric Biol Chem 55(8):1953-8

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Abstract


A 5.3-kbp fragment of the KHS gene was cloned from a genomic bank of Saccharomyces cerevisiae No. 115 constructed with an E. coli as the host and YEp13 as the vector. A non-killer yeast strain was transformed to a killer strain with the multi-copy vector containing the KHS gene, and the transformant could secrete 3-4 times more killer toxin into culture media than the donor, strain No. 115. The KHS toxin was purified 80-fold from the culture filtrate by gel filtration and column chromatography. The nucleotide sequence of a 2.8-kbp fragment of the KHS DNA that was enough for the expression of the killer activity was identified, and we found an open reading frame consisted of 2124 bp. Comparison of the open reading frame and N-terminal amino acid sequence of purified KHS toxin, suggested that the presumed peptide from the KHS gene might be processed between 36Gln and 37Ala before secretion.

Reference Type
Journal Article
Authors
Goto K, Fukuda H, Kichise K, Kitano K, Hara S
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