Chemistry: molecular biology and microbiology – Enzyme – proenzyme; compositions thereof; process for... – Hydrolase
Patent
1980-06-16
1982-03-09
Shapiro, Lionel M.
Chemistry: molecular biology and microbiology
Enzyme , proenzyme; compositions thereof; process for...
Hydrolase
435210, C12N 934
Patent
active
043189890
ABSTRACT:
A culture filtrate of Cladosporium resinae (Strain ATCC No. 20495) has been found to contain a mixture of starch-degrading enzymes capable of bringing about efficient conversion of starch and pullulan into glucose. Culture conditions resulting in optimal production of the pullulan degrading activity been established. The amylolytic enzyme preparation obtained by culturing the fungus under these optimal conditions has been fractionated by ion-exchange and molecular sieve chromatography and shown to contain at least four enzymes, a maltase, .alpha.-amylase and two glucoamylase-type enzymes including a novel exo-pullulanase. The maltase and glucoamylase enzymes have been purified to homogeneity and their substrate specificity investigated. Both the mixture and the exo-pullulanase can be used in the manufacture of dextrose from starch. Alone or in conjunction with appropriate other starch-degrading enzymes the mixture or the exo-pullulanase may be used in the production of specific starch conversion products, including fructose syrups. Both the mixture and the exo-pullanase are useful in increasing the fermentability of high DE starch conversion products and may be useful in the production of low calorie alcoholic beverages.
REFERENCES:
patent: 3852495 (1974-12-01), Schimpf
patent: 3988204 (1976-10-01), Andreasen et al.
patent: 4169013 (1979-09-01), Smith et al.
Lifeline Products, Inc.
Shapiro Lionel M.
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