Biomaterial Database

[beta-Glucosidases specific for the cyanogenic glucoside triglochinin from Alocasia macrorrhiza Schott: further characterization of properties (author's transl)]. 1977

W Hösel, and O Klewitz

All beta-glucosidases extracted and separated from a plant of Alocasia macrorrhiza are almost entirely specific for triglochinin. The hexameric beta-glucosidase has been shown to dissociate in dimers without any alteration of activity. Reaggregation could only be demonstrated using bifunctional reagents like glutaraldehyde. Treatments of beta-glucosidase with various chemicals (e. g. glutaraldehyde, dodecyl sulfate) decreased the activity for triglochinin more than the activity for 4-nitrophenyl glucoside. On the other hand, specific reagents like bromocondurite or p-chloromercuribenzoate caused identical inactivations measured with various substrates. It seems possible that the different beta-glucosidases splitting triglochinin arose during purification from the hexameric form which occurs in the plant.

UI	MeSH Term	Description	Entries
D009570	Nitriles	Organic compounds containing the -CN radical. The concept is distinguished from CYANIDES, which denotes inorganic salts of HYDROGEN CYANIDE.	Nitrile
D010944	Plants	Multicellular, eukaryotic life forms of kingdom Plantae. Plants acquired chloroplasts by direct endosymbiosis of CYANOBACTERIA. They are characterized by a mainly photosynthetic mode of nutrition; essentially unlimited growth at localized regions of cell divisions (MERISTEMS); cellulose within cells providing rigidity; the absence of organs of locomotion; absence of nervous and sensory systems; and an alternation of haploid and diploid generations. It is a non-taxonomical term most often referring to LAND PLANTS. In broad sense it includes RHODOPHYTA and GLAUCOPHYTA along with VIRIDIPLANTAE.	Plant
D005959	Glucosidases	Enzymes that hydrolyze O-glucosyl-compounds. (Enzyme Nomenclature, 1992) EC 3.2.1.-.	Glucosidase
D005960	Glucosides	A GLYCOSIDE that is derived from GLUCOSE.	Glucoside
D005976	Glutaral	One of the protein CROSS-LINKING REAGENTS that is used as a disinfectant for sterilization of heat-sensitive equipment and as a laboratory reagent, especially as a fixative.	Glutaraldehyde,Cidex,Diswart,Gludesin,Glutardialdehyde,Glutarol,Korsolex,Novaruca,Sekumatic,Sonacide,Sporicidin
D006027	Glycosides	Any compound that contains a constituent sugar, in which the hydroxyl group attached to the first carbon is substituted by an alcoholic, phenolic, or other group. They are named specifically for the sugar contained, such as glucoside (glucose), pentoside (pentose), fructoside (fructose), etc. Upon hydrolysis, a sugar and nonsugar component (aglycone) are formed. (From Dorland, 28th ed; From Miall's Dictionary of Chemistry, 5th ed)	Glycoside
D000272	Adipates	Derivatives of adipic acid. Included under this heading are a broad variety of acid forms, salts, esters, and amides that contain a 1,6-carboxy terminated aliphatic structure.	Adipic Acids,Hexanedioic Acids,Acids, Adipic,Acids, Hexanedioic
D001617	beta-Glucosidase	An exocellulase with specificity for a variety of beta-D-glycoside substrates. It catalyzes the hydrolysis of terminal non-reducing residues in beta-D-glucosides with release of GLUCOSE.	Cellobiases,Amygdalase,Cellobiase,Emulsion beta-D-Glucosidase,Gentiobiase,Emulsion beta D Glucosidase,beta Glucosidase,beta-D-Glucosidase, Emulsion
D013379	Substrate Specificity	A characteristic feature of enzyme activity in relation to the kind of substrate on which the enzyme or catalytic molecule reacts.	Specificities, Substrate,Specificity, Substrate,Substrate Specificities
D046911	Macromolecular Substances	Compounds and molecular complexes that consist of very large numbers of atoms and are generally over 500 kDa in size. In biological systems macromolecular substances usually can be visualized using ELECTRON MICROSCOPY and are distinguished from ORGANELLES by the lack of a membrane structure.	Macromolecular Complexes,Macromolecular Compounds,Macromolecular Compounds and Complexes,Complexes, Macromolecular,Compounds, Macromolecular,Substances, Macromolecular