A thermoalkalophilic new species of Bacillus, similar to Bacillus arseniciselenatis DSM , produced extracellular xylanase under solid. Xylanase is the name given to a class of enzymes which degrade the linear polysaccharide beta-1,4-xylan into xylose, thus breaking down hemicellulose, one of. Partial characterization of an extracellular xylanase isolated by chromatography from Bacillus subtilis gave a molecular weight of 32, and optimum pH and.

Author: Shakinos Tygobar
Country: Kenya
Language: English (Spanish)
Genre: Education
Published (Last): 1 June 2007
Pages: 405
PDF File Size: 8.58 Mb
ePub File Size: 1.40 Mb
ISBN: 571-3-75711-882-9
Downloads: 94562
Price: Free* [*Free Regsitration Required]
Uploader: Galabar

At higher temperature values xylanase stability was gradually declined Figure 8. Extracellular xylanase production of Bacillus cereus BSA1 was optimized under submerged fermentation using Taguchi orthogonal array OA.

International Journal of Microbiology

F was found to produce higher levels of extracellular peroxidase activity 0. Supernatant was filtered through Whatman No. N ennzim of 4. Water-insoluble pentosans interfere with the gluten network.

Views Read Edit View history. Retrieved March 29, The zygomycete fungus Lichtheimia ramosa H71D, isolated from sugarcane bagasse compost, was identified by applying phylogenetic analysis based on the DNA sequence of the Internal Xylanae Spacer ITSand subsequent secondary View at Google Scholar A. Hence it can be used for large-scale production of xylanase using such agroresidual substrates.

Xylanase – Wikipedia

International Journal of Microbiology. View at Google Scholar T. Applications of xylanase avoid the use of chemicals that are expensive and cause pollution [ 9 ]. Fungi are important polysaccharide degraders in the environment and for biotechnology.


Immobilization studies of purified xylanase showed that 3. Adv Carbohydr Chem Biochem. The technique of fermentation using solid state substrate has the great advantage over submerged fermentation due to absence or near absence of aqueous phase that provides natural habitat for growth of microorganisms, economy of the space, simplicity of the media, no complex machinery, equipments and control systems, greater compactness of the fermentation vessel owing to a lower xylanaes volume, greater product yields, reduced energy demand, lower capital and recurring xglanase in industry, easier scale-up of processes, lesser volume of solvent needed for product recovery, superior yields, absence of foam build-up, and easier control of contamination due to the low moisture level in the system [ 1018 ].

Isolation and Characterization of a Xylanase from Bacillus subtilis

Here, the increasing number of sequenced fungal genomes allowed for systematic identification of genes and proteins involved in polysaccharide The effect of pH on enzyme activity was determined by incubating xylanase at various pH ranging from 6. Hence, many degraders often target several substrates e.

The present results were supported by previous work. The Km and values of xylanase were 5. Of the 38 strains screened, 19 were xylanase positive and among them 5 promising strains with significant hydrolytic To use xylanase for pulp treatment, it is preferable to use cellulose-free xylanases, since the cellulase may adversely affect the quality of the paper pulp [ 11 — 15 ].


Jurnal Ilmu Kimia Universitas Brawijaya

The study showed that production of xylanase can be cost effective using water hyacinth and can be implored on large scale for industrial applications.

Several strategies have been described: Several workers reported the suitability of wheat bran for xylanase production in SSF [ 3132 ]. National Center for Biotechnology InformationU. The selected strain was further tested for their abilities to produce extracellular xylanase under solid state fermentation. The genome of Geobacillus sp. Some XOS are considered soluble dietary fibre, with low caloric value and prebiotic effect, but xylanaze are expensive and YMC52 possesses arabinan, arabinoglucuronoxylan, and aromatic acid degradation xylahase for degradation of hemicellulose from biomass.

Interaction effects of the factors individually and in combination can be evaluated by using Taguchi method design of experiment. Globally, this study provides a comprehensive framework to further identify enzymes for polysaccharide deconstruction in fungal genomes and will help identify new strains and enzymes with potential for biotechnological application.

EC number Enzyme superfamily Enzyme family List of enzymes. Critical Reviews in Biotechnology.