Mannanases: microbial sources, production, properties and potential biotechnological applications

Abstract

Mannans are the major constituents of the hemicellulose fraction in softwoods and show widespread distribution in plant tissues. The major mannan-degrading enzymes are β-mannanases, β-mannosidases and β-glucosidases. In addition to these, other enzymes such as α-galactosidases and acetyl mannan esterases, are required to remove the side chain substituents. The mannanases are known to be produced by a variety of bacteria, fungi, actinomycetes, plants and animals. Microbial mannanases are mainly extracellular and can act in wide range of pH and temperature because of which they have found applications in pulp and paper, pharmaceutical, food, feed, oil and textile industries. This review summarizes the studies on mannanases reported in recent years in terms of important microbial sources, production conditions, enzyme properties, heterologous expression and potential industrial applications.

Experimental design of response surface methodology used for utilisation of palm kernel cake as solid substrate for optimised production of fungal mannanase

“…From the industrial point of view, economical and efficient conversion of these polymers, especially cellulose and hemicellulose, to their constituent monomer is very important (Moreira and Filho 2008). Hemicellulose is the second most abundant heteropolymer composed of mainly pentoses (xylose, arabinose), hexoses (mannose, glucose, galactose) and sugar acids (Chauhan et al 2012). Mannan is the second major hemicellulose after xylan that occurs as a hemicellulose fraction of soft and hard wood.…”

Investigation of Antioxidant and Enzyme Inhibition Activities and Phenolic Compound of Medicago rigidula (L.) All.

“…Enzim inhibitörleri küçük moleküler kimyasal bileşenlerdir ve enzimin katalitik aktivitesini inhibe ederek düşürebilirler (23). Günümüzde enzim inhibisyonu önemli bir farmakolojik araştırma alanıdır.…”

Lime and Sulphide-Free Dehairing of Animal Skin Using Collagenase-Free Alkaline Protease from Vibrio metschnikovii NG155

“…hydrogen sulfide and lime [2]. Nowadays, chemical processes are being replaced by enzyme based processes in number of industries [3][4][5][6]. Accordingly, as an alternative to chemical dehairing, enzyme-based dehairing processes using proteases are being developed Although there are numerous studies on the use of enzymes for dehairing [7,8], its commercial application in the leather manufacturing is not much prevalent.…”