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Cloning and Characterization of Xylanase Gene from Paenibacillus woosongensis
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  • Journal title : The Korean Journal of Microbiology
  • Volume 48, Issue 2,  2012, pp.141-146
  • Publisher : The Microbiological Society of Korea
  • DOI : 10.7845/kjm.2012.48.2.141
 Title & Authors
Cloning and Characterization of Xylanase Gene from Paenibacillus woosongensis
Yoon, Ki-Hong;
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 Abstract
A gene encoding the xylanase (XynA) predicted from partial genomic sequence of Paenibacillus woosongensis was cloned into Escherichia coli by PCR. This xynA gene consisted of 633 nucleotides, encoding a polypeptide of 211 amino acid residues. The deduced amino acid sequence exhibited 85-89% identity with those of several Paenibacillus xylanases, belonging to the glycosyl hydrolase family 11. As a results of expression of the structural gene by T7 promoter of a pET23a(+) expression vector, xylanase activity was higher in cell-free extract than culture filtrate of a recombinant Escherichia coli BL21(DE3) CodonPlus. However, the expression level of xylanase was not sufficient be detected by SDS-PAGE. The cell-free extract showed maximal xylanase activity at and pH 5.5. The predominant products resulting from xylan and xylooligosaccharide hydrolysis were xylose and xylotriose. The enzyme could hydrolyze xylooligosaccharides larger than xylbiose.
 Keywords
Paenibacillus woosongensis;cloning;reaction property;xylanase;
 Language
Korean
 Cited by
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