Reference: Rose M, et al. (1981) Yeast genes fused to beta-galactosidase in Escherichia coli can be expressed normally in yeast. Proc Natl Acad Sci U S A 78(4):2460-4

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Abstract


A plasmid was constructed that allows the selection in vivo of gene fusions between the Escherichia coli beta-galactosidase gene and the yeast (Saccharomyces cerevisiae) URA3 gene. A large yeast DNA fragment containing the URA3 gene was placed upstream of an amino-terminally deleted version of the lacZ gene. The plasmid vehicle contains sequences that allow selection and maintenance of the plasmid in both yeast and E. coli. Selection for Lac+ in E. coli yielded numerous deletions that fused the lacZ gene to the URA3 gene and flanking yeast sequences, to the bacterial tetracycline-resistance gene from the parent plasmid pBR322, and to the yeast 2-micrometer plasmid DNA. Some of these fusion plasmids produced beta-galactosidase activity when introduced into yeast. One of the fusions to the URA3 gene itself has been shown to place the expression of beta-galactosidase activity under uracil regulation in yeasts.

Reference Type
Journal Article | Research Support, Non-U.S. Gov't | Research Support, U.S. Gov't, Non-P.H.S. | Research Support, U.S. Gov't, P.H.S.
Authors
Rose M, Casadaban MJ, Botstein D
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