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  • Title: Glucoamylase of Aspergillus niger.
    Author: Bartoszewicz K.
    Journal: Acta Biochim Pol; 1986; 33(1):17-29. PubMed ID: 3087124.
    Abstract:
    Aspergillus niger produces two extracellular glucoamylases (GAI of Mr 85 300 and GAII of Mr 77 600) separable on DEAE-cellulose. The enzymes differes in electrophoretic mobility, thermostability and substrate specificity. The GAI/GAII ratio depends on the concentration and form of nitrogen (nitrate or ammonium) in the culture medium. Proteinase VIII from Bacillus subtilis converts GAI to a form showing properties similar to those of GAII. Possible proteolytic degradation of GAI to GAII by Asp. niger endogenous proteinase(s) is suggested.
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