Search results
Results from the WOW.Com Content Network
Cellobiose is a disaccharide with the formula (C 6 H 7 (OH) 4 O) 2 O. It is classified as a reducing sugar - any sugar that possesses the ability or function of a reducing agent. The chemical structure of cellobiose is derived from the condensation of a pair of β-glucose molecules forming a β(1→4) bond.
In enzymology, a cellobiose phosphorylase (EC 2.4.1.20) is an enzyme that catalyzes the chemical reaction. cellobiose + phosphate alpha-D-glucose 1-phosphate + D-glucose. Thus, the two substrates of this enzyme are cellobiose and phosphate, whereas its two products are alpha-D-glucose 1-phosphate and D-glucose.
In enzymology, a cellobiose dehydrogenase (acceptor) (EC 1.1.99.18) is an enzyme that catalyzes the chemical reaction cellobiose + acceptor ⇌ {\displaystyle \rightleftharpoons } cellobiono-1,5-lactone + reduced acceptor
In enzymology a cellobiose epimerase (EC 5.1.3.11) is an enzyme that catalyzes the chemical reaction cellobiose ⇌ {\displaystyle \rightleftharpoons } D-glucosyl-D-mannose Hence, this enzyme has one substrate , cellobiose , and one product , D-glucosyl-D-mannose .
There are two functionally different classes of disaccharides: Reducing disaccharides, in which one monosaccharide, the reducing sugar of the pair, still has a free hemiacetal unit that can perform as a reducing aldehyde group; lactose, maltose and cellobiose are examples of reducing disaccharides, each with one hemiacetal unit, the other occupied by the glycosidic bond, which prevents it from ...
This enzyme catalyses the hydrolysis of (1→4)-β-D-glucosidic linkages in cellulose and cellotetraose, releasing cellobiose from the non-reducing ends of the chains. CBH1 from yeast, for example, is composed of a carbohydrate binding site, a linker region and a catalytic domain. [ 6 ]
Ribbon representation of the Streptomyces lividans β-1,4-endoglucanase catalytic domain - an example from the family 12 glycoside hydrolases [1]. Cellulase (EC 3.2.1.4; systematic name 4-β-D-glucan 4-glucanohydrolase) is any of several enzymes produced chiefly by fungi, bacteria, and protozoans that catalyze cellulolysis, the decomposition of cellulose and of some related polysaccharides:
In the case of the Christmas Island red crab β-glucosidase not only produces glucose, but also removes cellobiose. [15] This is important as cellobiose is an inhibitor for a number of enzymes including endo-β-1,4-glucanase and cellobiohydrolase. β-Glucosidase is also capable of hydrolysis on small oligomers that are produced by other enzymes ...