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  • Title: Nucleotide sequence of a beta-1,3-glucanase isoenzyme IIA gene of Oerskovia xanthineolytica LL G109 (Cellulomonas cellulans) and initial characterization of the recombinant enzyme expressed in Bacillus subtilis.
    Author: Ferrer P, Halkier T, Hedegaard L, Savva D, Diers I, Asenjo JA.
    Journal: J Bacteriol; 1996 Aug; 178(15):4751-7. PubMed ID: 8755914.
    Abstract:
    The nucleotide sequence of the betaglIIA gene, encoding the extracellular beta-1,3-glucanase IIA (betaglIIA) of the yeast-lytic actinomycete Oerskovia xanthineolytica LL G109, was determined. Sequence comparison shows that the betaglIIA enzyme has over 80% identity to the betaglII isoenzyme, an endo-beta-1,3-glucanase having low yeast-lytic activity secreted by the same bacterium. The betaglIIA enzyme lacks a glucan- or mannan-binding domain, such as those observed in beta-1,3-glucanases and proteases having high yeast/fungus-lytic activity. It can be included in the glycosyl hydrolase family 16. Gene fusion expression in Bacillus subtilis DN1885 followed by preliminary characterization of the recombinant gene product indicates that betaglIIA has a pI of 3.8 to 4.0 and is active on both laminarin and curdlan, having an acid optimum pH activity (ca. 4.0).
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