Abstract：
:The xylanase gene from Gloeophyllum trabeum was cloned and expressed in Pichia pastoris GS115. Xyl10g has a molecular weight of approximately 50kDa, and exhibits maximum specific activity at 70°C and a broad range of pH 4.0-7.0. Purified recombinant Xyl10g efficiently degraded popping-pretreated corn stover and newspaper waste at 50°C and pH 4.0 after 24h, and showed synergistic effects with Cel5B (endoglucanase) and BglB (β-glucosidase) to increase reduced sugar levels by about 1.71- to 1.88-fold and 2.26- to 2.48-fold, respectively. Although Xyl10g has low specific activity for beechwood xylan, as compared to XynA, Xyl10g more efficiently degraded corn stover than did XynA. According to immunogold labeling analysis, Xyl10g can attack highly substituted, unsubstituted, and low-substituted xylans, whereas XynA cannot efficiently attack highly substituted xylans, which is important for lignocellulose degradation. These results suggest that GH10 Xyl10g can be used for lignocellulose degradation.
journal_name
J Biotechnoljournal_title
Journal of biotechnologyauthors
Kim HM,Lee KH,Kim KH,Lee DS,Nguyen QA,Bae HJdoi
10.1016/j.jbiotec.2013.12.013subject
Has Abstractpub_date
2014-02-20 00:00:00pages
38-45eissn
0168-1656issn
1873-4863pii
S0168-1656(13)00556-7journal_volume
172pub_type
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