Overproduction of the Aspergillus niger feruloyl esterase for pulp bleaching application

被引:0
作者
E. Record
M. Asther
C. Sigoillot
S. Pagès
P. J. Punt
M. Delattre
M. Haon
C. A. M. J. J. van den Hondel
J.-C. Sigoillot
L. Lesage-Meessen
Marcel Asther
机构
[1] Universités de Provence et de la Méditerranée,UMR 1163 INRA/Université de Provence de Biotechnologie des Champignons Filamenteux, IFR
[2] CNRS UPR9036,BAIM
[3] Université de Provence,Laboratoire de Bioénergétique et Ingénierie des Protéines
[4] TNO Nutrition and Food Research Institute,Department of Applied Microbiology and Gene Technology
来源
Applied Microbiology and Biotechnology | 2003年 / 62卷
关键词
Esterase Activity; Kappa Number; Pulp Bleaching; Feruloyl Esterase; Pulp Treatment;
D O I
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学科分类号
摘要
A well-known industrial fungus for enzyme production, Aspergillus niger, was selected to produce the feruloyl esterase FAEA by homologous overexpression for pulp bleaching application. The gpd gene promoter was used to drive FAEA expression. Changing the nature and concentration of the carbon source nature (maltose to glucose; from 2.5 to 60 g l−1), improved FAEA activity 24.5-fold and a yield of 1 g l−1 of the corresponding protein in the culture medium was achieved. The secreted FAEA was purified 3.5-fold to homogeneity in a two-step purification procedure with a recovery of 69%. The overproduced protein was characterised and presented properties in good agreement with those of native FAEA. The recombinant FAEA was tested for wheat straw pulp bleaching, with or without a laccase mediator system and xylanase. Best results were obtained using a bi-sequential process with a sequence including xylanase, FAEA and laccase, and yielded very efficient delignification—close to 75%—and a kappa number of 3.9. This is the first report on the potential application of recombinant FAEA in the pulp and paper sector.
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页码:349 / 355
页数:6
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