Microbial Cellulases and Their Industrial Applications

Kuhad, Ramesh Chander; Gupta, Rishi; Singh, Ajay

doi:10.4061/2011/280696

Cited by 716 publications

(403 citation statements)

References 73 publications

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“…Cellulases act on the surface and inner layers of cellulose fibers in an efficient enough way to allow the production of special paper with reduced energy consumption. Cellulase effects on fiber morphology lead to improved fiber-fiber bonding in the refining process and hence to increased fiber cohesion in the final paper (Cadena 2010;Kaur 2010;Kuhad 2011;Luo 2011;Ponce and Perez 2002).…”

Section: Cellulasementioning

confidence: 99%

Enzymatic approaches in paper industry for pulp refining and biofilm control

Torres

Negro

Fuente

et al. 2012

Appl Microbiol Biotechnol

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The use of enzymes has a high potential in the pulp and paper industry to improve the economics of the paper production process and to achieve, at the same time, a reduced environmental impact. Specific enzymes contribute to reduce the amount of chemicals and energy required for the modification of fibers and helps to prevent the formation or development of biofilms. This review is aimed at presenting the latest progresses made in the application of enzymes as refining aids and biofilm control agents.

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Section: Cellulasementioning

confidence: 99%

Enzymatic approaches in paper industry for pulp refining and biofilm control

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Negro

Fuente

et al. 2012

Appl Microbiol Biotechnol

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“…Moreover, we found that CelMytB can degrade soluble cellulose, crystalline cellulose and xylan. These properties and the stability of CelMytB in the presence of several detergents indicate that this enzyme has potential applications in the food, textile, laundry, pulp and paper industries [30]. …”

Section: Resultsmentioning

confidence: 99%

Cloning and Characterizing the Thermophilic and Detergent Stable Cellulase CelMytB from Saccharophagus sp. Myt-1

et al. 2013

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We previously isolated and reported a second species of the Saccharophagus genus, Saccharophagus sp. strain Myt-1. In the present study, a cellulase gene (celMytB) from the genomic DNA of Myt-1 was cloned and characterized. The DNA sequence fragment contained an open reading frame of 1,893 bp that encoded a protein of 631 amino acids with an estimated molecular mass of 66.8 kDa. The deduced protein, CelMytB, had a catalytic domain that contained a conserved signature sequence (VIYEIYNEPL) of glycosyl hydrolase family 5 and a CBM6 cellulose binding module. CelMytB showed optimal activity at 55°C and pH 6.5, which is similar to the optimal temperature and pH profile of cel5H, an endoglucanase from the closely related S. degradans 2-40. However, the cellulase (degradation of soluble cellulose) and avicelase (degradation of crystalline cellulose) activities of CelMytB were about 3-fold and 100-fold higher, respectively, than the equivalent activities of cel5H. Moreover, CelMytB could degrade xylan. From the zymogram results, we speculated that the catalytic domain of CelMytB had high activity even without the cellulose binding module. The presence of some detergents stimulated the cellulase activity of CelMytB.

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“…During the process of biopolishing, cellulase hydrolyzes the small protrusions of the fibres from the surface of cotton clothes, thus removes the fussiness of the surface so as to create a smooth and glossy appearance [107,118]. Cellulases are also used to improve the dye absorbance of the fibres and to remove excess dye, giving a colour gradient to the fabrics [112]. Cellulases found potential applications as additive in household laundry detergents for improving fabric softness and brightness.…”

Section: Textile Industrymentioning

confidence: 99%

“…Enzymatic deinking of waste papers, especially employing the mixtures of cellulase and hemicellulase, enhance the quality and brightness of the recycled paper [109][110][111]. Cellulases are also used to improve the drainage of several paper mills by dissolving clogged fibre residues [112]. Moreover, the cellulase preparations are also used to make easily biodegradable cardboards, tissue papers and sanitary papers [113][114][115].…”

Section: Paper and Pulp Industriesmentioning

confidence: 99%

An Overview on Fungal Cellulases with an Industrial Perspective

Sreedharan¹

2016

J Nutr Food Sci

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Lignocellulose is the most abundant biopolymer available on earth. Hydrolysis of lignocellulose into fermentable sugars, sugar acids and phenolics is the pre-requisite for its successful exploitation as substrates for the large scale production of industrially significant value added products. Though remarkable collection of lignocellulolytic microorganisms has been brought to limelight, only a few especially fungi have been studied extensively as they secrete copious lignocellulolytic enzymes extracellularly. Enzymatic hydrolysis of lignocelluloses is carried out by a group of enzymes viz., cellulases, hemicellulases, ligninases in unison or individually, and are collectively known as lignocellulolytic enzymes. In this light of this background, followed by a short introduction on lignocellulose, lignocellulolytic enzymes and mainly focused on fungal cellulase, this review discusses recent approaches on the production of cellulase by submerged and solid-state fermentation strategies; current knowledge on the purification, characterisation of cellulase; and finally concluded with detailed industrial applications of fungal cellulase.

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Microbial Cellulases and Their Industrial Applications

Cited by 716 publications

References 73 publications

Enzymatic approaches in paper industry for pulp refining and biofilm control

Enzymatic approaches in paper industry for pulp refining and biofilm control

Cloning and Characterizing the Thermophilic and Detergent Stable Cellulase CelMytB from Saccharophagus sp. Myt-1

An Overview on Fungal Cellulases with an Industrial Perspective

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