Hemicellulase

Many strains of Bacillus subtilis were found to secrete several hemicellulolytic enzymes such as arabinoxylanase, galactomannanase, arabinogalactanase, etc. Hemicellulose is the second most abundant lignocellulosic biopolymer consisting of mostly xylan and other polysaccharides .

COMMERCIAL IMPORTANCE:

  • Hemicellulases responsible for depolymerization of hemicellulose, including α‐glucuronidase, α‐arabinofuranosidase, arabinase, endo‐mannanase, β‐mannosidase, acetyl xylan esterase and feruloyl xylan esterase

  • In a few cases they possess a substrate binding domain which helps them bind to the substrates bringing efficient hydrolysis.

  • Hemicellulases are traditionally applied in food, feed, detergent and paper industries, but their applications in hydrolysis of hemicellulose to release sugars is expected to increase, driven by the rapid development of lignocellulose biorefineries.

  • Screening more powerful hemicellulases from nature, mining their coding genes from various sources and engineering them genetically are recommended for broadening their applications.

  • Advances in recombinant DNA technology have made it feasible to clone, improve and functionally express them in various hosts.-https://onlinelibrary.wiley.com/doi/full/10.1002/jctb.3969#accessDenialLayout

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4237932/ -reference

https://www.tandfonline.com/doi/abs/10.1080/00021369.1971.10860175

MORE DETAILS-https://www.jstage.jst.go.jp/article/bbb1961/35/12/35_12_1891/_pdf