Reference: Yamashita I, et al. (1985) Polymorphic extracellular glucoamylase genes and their evolutionary origin in the yeast Saccharomyces diastaticus. J Bacteriol 161(2):574-82

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Abstract


DNA coding for extracellular glucoamylase genes STA1 and STA3 was isolated from DNA libraries of two Saccharomyces diastaticus strains, each carrying STA1 or STA3. Cells transformed with a plasmid carrying either the STA1 or STA3 gene secreted glucoamylases having the same enzymatic and immunological properties and the same electrophoretic mobilities in acrylamide gel electrophoresis as those of authentic glucoamylases. Southern blot analysis of genomic DNA from S. diastaticus and a glucoamylase-non-secreting yeast, Saccharomyces cerevisiae, revealed that the STA1 and STA3 loci of S. diastaticus showed a high degree of homology, and that both yeast species (S. diastaticus and S. cerevisiae) contained DNA segments highly homologous to those of the extracellular glucoamylase genes. Restriction maps of the homologous DNA segments suggested that the extracellular glucoamylase genes of S. diastaticus may have arisen from recombination among the resident DNA segments in S. cerevisiae.

Reference Type
Journal Article | Research Support, Non-U.S. Gov't
Authors
Yamashita I, Maemura T, Hatano T, Fukui S
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