Biomaterial Database

Glucoamylase of Aspergillus niger. 1986

K Bartoszewicz

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.

UI	MeSH Term	Description	Entries
D007700	Kinetics	The rate dynamics in chemical or physical systems.
D003470	Culture Media	Any liquid or solid preparation made specifically for the growth, storage, or transport of microorganisms or other types of cells. The variety of media that exist allow for the culturing of specific microorganisms and cell types, such as differential media, selective media, test media, and defined media. Solid media consist of liquid media that have been solidified with an agent such as AGAR or GELATIN.	Media, Culture
D005087	Glucan 1,4-alpha-Glucosidase	An enzyme that catalyzes the hydrolysis of terminal 1,4-linked alpha-D-glucose residues successively from non-reducing ends of polysaccharide chains with the release of beta-glucose. It is also able to hydrolyze 1,6-alpha-glucosidic bonds when the next bond in sequence is 1,4.	1,4-alpha-Glucosidase, Exo,Amyloglucosidase,Exo-1,4-alpha-Glucosidase,Glucoamylase,gamma-Amylase,Glucoamylase G1,Glucoamylase G2,1,4-alpha-Glucosidase, Glucan,Exo 1,4 alpha Glucosidase,Glucan 1,4 alpha Glucosidase,gamma Amylase
D005959	Glucosidases	Enzymes that hydrolyze O-glucosyl-compounds. (Enzyme Nomenclature, 1992) EC 3.2.1.-.	Glucosidase
D001234	Aspergillus niger	An imperfect fungus causing smut or black mold of several fruits and vegetables such as grapes, apricots, onions, and peanuts, and is a common contaminant of food.	Aspergillus lacticoffeatus