Cellobiase

Cellobiase is an enzyme that can hydrolyze substrates using beta-glucosidic bonds. It can be used for alcohol fermentation. It can hydrolyze β - D - glycosidic linkages at the reducing end, and isomalto - oligosaccharides, sugar esters, glycopeptides etc are gathered therein.

In this survey we will learn about cellobiase. The last step in the process involved in the degradation of cellulose, cellobiase being a molecule consisting of long-chain glucose found on the plant cell wall, goes into glucose. This is a natural process using many fungi and bacteria (such as those found in termite viscera, ruminal stomach and compost) to produce glucose as a food source. Decomposing cellulose into sugar from plants is also an important step in the production of ethanol for fuels.

Figure 1: Detection of glucose from cellobiose degradation by cellobiase. (One). A cellobiose analog known as p-nitrophenyl pyranoside is used to detect enzyme activity and accumulation of glucose. When cleaved by cellobiase, p-nitrophenol is released. It can be detected by yellow color in alkaline solution. (B) p-nitrophenol changes from colorless to slightly yellow at pH 5. Under alkaline conditions, however, the hydrogen ion of the hydroxyl group (OH group) is removed and a negatively charged group is generated due to a pair of additional electrons remaining on the remaining oxygen. The electron pair propagates along the nitrophenolate anion to form a yellow resonance structure.

In this study, biomass was enzymatically hydrolyzed using a new immobilized cellobiase system to produce cellulosic ethanol. The use of immobilized cellobiase allows the enzyme to be easily separated from the reaction mixture by hydrolysis. Cellobiase is immobilized on a porous solid silica host material by an acid-catalyzed non-surfactant template sol-gel reaction of tetraethyl orthosilicate (TEOS). The pore size and porosity of the host material are controlled by varying the template (d-fructose) content. Compared to hydrolysis by free cellobiase, using the immobilized cellobiase sample, pretreated biomass with hydrolysis efficiency of up to 74% (using FeCl 3 pretreated biomass) and 81% (using oxalic acid pretreatment) Was hydrolyzed. Processing biomass). After the hydrolysis reaction, the solid immobilized enzyme sample can be easily recycled from the reaction mixture.

Enzymatic hydrolysis of biomass can be recycled to cellobiase immobilized on pore mesoporous silica in sol - gel