1887

Abstract

The nucleotide sequence of the GS-5 gene coding for the glucosyltransferase which synthesizes water-soluble glucan (GTF-S) has been determined. The complete gene contains 4293 base pairs and the unprocessed protein is composed of 1430 amino acids with a molecular mass of 159814 Da. The amino terminus of the unprocessed protein resembles the signal sequences of other extracellular proteins secreted by and that of the GTF-I secreted by In addition, the GTF-S protein exhibits high amino acid similarity with the strain GS-5 enzymes responsible for insoluble glucan synthesis (GTF-I, GTF-SI) previously isolated and sequenced in this laboratory. These results indicate that all three genes evolved from a common ancestral gene.

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1990-10-01
2021-05-06
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