Cellulase

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Related to Cellobiohydrolase: cellobiose, Endoglucanase

cellulase

[′sel·yə‚lās]
(biochemistry)
Any of a group of extracellular enzymes, produced by various fungi, bacteria, insects, and other lower animals, that hydrolyze cellulose.

Cellulase

 

an enzyme of the hydrolase class. Cellulase depolymerizes cellulose polysaccharides (including cellulose itself) and forms glucose or the disaccharide cellobiose. Cellulase is found in germinated grain and in many bacteria and fungi; it is especially active in house fungi that grow on wood. Cellulase is also found in certain animals that feed on wood; these animals include shipworms and Cossidae. Ruminants are able to digest cellulose because symbiotic microorganisms that release cellulase live in the compartments of their stomachs, especially in the rumen.

References in periodicals archive ?
The CELTN showed higher level cellulytic activity of 12464 Umg-1 as compared to 1536 and 1219 Umg-1 for CelB and CelA from Thermotoga neapolitana (Bok et al., 1998), 735 Umg-1 for GH12 endoglucanase from Thermotoga petrophila (Haq et al., 2015), 66 Umg-1 for thermostable Cellobiohydrolase from Thermotoga petrophila (Haq et al., 2018) and 4.23 Umg-1 for hyper-thermostable endoglucanase from Thermotoga meritima (Zhang et al., 2015).
Silva, "Evidence of cAMP involvement in cellobiohydrolase expression and secretion by Trichoderma reesei in presence of the inducer sophorose," BMC Microbiology, vol.
Ding, "Cellobiohydrolase hydrolyzes crystalline cellulose on hydrophobic faces," The Journal of Biological Chemistry, vol.
Cellobiohydrolase. -- Cellobiohydrolase (1,4-B-D-glucan cellobiohydrolase, EC 3.2.1.91) activity was measured by combining in separate test tubes 2.0 mL of enzyme with 20 mg of microcrystalline cellulose (type 50, Sigma Chemical Co.) in 1.0 mL of 0.05 M sodium citrate buffer (pH 5.0) and incubating the reaction mixture for 120 minutes at 40[degrees]C.
Wood biofilms were assayed for the activity of cellobiohydrolase (CBH, EC [Enzyme Commission number] 3.2.1.91), an extracellular enzyme involved in the degradation of lignocellulose, as outlined by Sinsabaugh et al.
There are three major types of enzymes in cellulase system: [[beta]-1,4-endoglucanase (endocellulases, EC 3.2.1.4), which randomly hydrolyze internal bonds), cellobiohydrolase (exocellulases, EC 3.2.1.91), cleave the ends of the cellulose chains results in cellotetraose or cellobiose) and [beta]-glucosidases (EC 3.2.1.21), which produce monosaccharide, glucose from cellobiose [3].
The same situation was found in the strain Cellvibrio mixtus that possesses 9 endoglucanases and 12 [beta]-glucosidases but no cellobiohydrolase. Because of the lack, strain PR1 and Cellvibrio mixtus could not grow on cellulose.
Three-dimensional structure of cellobiohydrolase II from Trichoderma reesei.
Shu, "Production and distribution of endoglucanase, cellobiohydrolase, and [beta]-glucosidase components of the cellulolytic system of Volvariella volvacea, the edible strawmushroom," Appliedand-Environmental Microbiology, vol.
Trametes versicolor produces a multicomponent cellulase system, consisting of endoglucanase (EC 3.2.1.4), cellobiohydrolase (EC 3.2.1.91), and [beta]-glucosidase (EC 3.2.1.21) (Cai et al.
Cellobiohydrolase, endoglucanase and xylanase activities were detected in fluids collected from cultures containing sodium carboxymethyl cellulose (CMC) or xylan as carbon sources and enzyme inducers.