Cloning, expression, and purification of insect (Sitophilus oryzae) alpha-amylase, able to digest granular starch, in Yarrowia lipolytica host

被引：34

作者：

Celinska, Ewelina ^{[1
]}

Biaas, Wojciech ^{[1
]}

Borkowska, Monika ^{[1
]}

Grajek, Wlodzimierz ^{[1
]}

机构：

[1] Poznan Univ Life Sci, Dept Biotechnol & Food Microbiol, PL-60627 Poznan, Poland

来源：

APPLIED MICROBIOLOGY AND BIOTECHNOLOGY | 2015年 / 99卷 / 06期

关键词：

Amylase; Granular starch; Rice weevil; Yarrowia lipolytica; Recombinant protein expression; GREEN BELL PEPPER; RICE WEEVIL; BIOCHEMICAL-CHARACTERIZATION; ZABROTES-SUBFASCIATUS; HANSENULA-POLYMORPHA; HYDROPEROXIDE LYASE; PROTEIN EXPRESSION; THERMOBIFIDA-FUSCA; ESCHERICHIA-COLI; CITRIC-ACID;

D O I：

10.1007/s00253-014-6314-2

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

Raw-starch-digesting enzymes (RSDE) are of major importance for industrial applications, as their usage greatly simplifies the starch processing pipeline. To date, only microbial RSDE have gained considerable attention, since only microbial production of enzymes meets industrial demands. In this study, alpha-amylase from rice weevil (Sitophilus oryzae), the major rice pest, was cloned and expressed in Yarrowia lipolytica Po1g strain. The enzyme was secreted into the culture medium, and the peak activity (81 AU/L) was reached after only 29 h of culturing in 5-L bioreactors. Through simple purification procedure of ammonium sulfate precipitation and affinity chromatography, it was possible to purify the enzyme to apparent homogeneity (25-fold purification factor, at 5 % yield). The optimal conditions for the alpha-amylase activity were pH 5.0 and a temperature of 40 A degrees C. The alpha-amylase studied here did not show any obligate requirement for Ca2+ ions. The recombinant alpha-amylase appeared to efficiently digest granular starch from pea, amaranth, waxy corn, and waxy rice.

引用

页码：2727 / 2739

页数：13

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