Cloning, expression, and characterization of single-chain variable fragment antibody against mycotoxin deoxynivalenol in recombinant Escherichia coli

被引:51
作者
Choi, GH
Lee, DH
Min, WK
Cho, YJ
Kweon, DH
Son, DH
Park, K
Seo, JH [1 ]
机构
[1] Seoul Natl Univ, Sch Agr Biotechnol, Seoul 151742, South Korea
[2] Andong Natl Univ, Sch Bioresource Sci, Kyungbuk 760749, South Korea
[3] Korea Food Res Inst, Sungnam 463746, South Korea
[4] Eugene Sci Inc, Puchon 421150, South Korea
关键词
deoxynivalenol; scFv; molecular chaperone; inclusion body; Escherichia coli;
D O I
10.1016/j.pep.2003.12.008
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
Deoxynivalenol (DON), a mycotoxin produced by several Fusarium species, is a worldwide contaminant of food and feedstuffs. The DON-specific single-chain variable fragment (scFv) antibody was produced in recombinant Escherichia coli. The variable regions of the heavy chain (V-H) and light chain (V-L) cloned from the hybridoma 3G7 were connected with a flexible linker using an overlap extension polymerase chain reaction. Nucleotide sequence analysis revealed that the anti-DON VH was a member of the V-H III gene family IA subgroup and the VL gene belonged to the V, gene family II subgroup. Extensive efforts to express the functional scFv antibody in E. coli have been made by using gene fusion and chaperone coexpression. Coexpression of the molecular chaperones (DnaK-DnaJ-GrpE) allowed soluble expression of the scFv. The scFv antibody fused with hexahistidine residues at the C-terminus was purified by immobilized metal affinity chromatography (IMAC). Soluble scFv antibody produced in this manner was characterized for its antigen-binding characteristics. Its biological affinity as antibody was measured by surface plasmon resonance (SPR) analysis and proved to be significant but weaker than that of the whole anti-DON mAb. (C) 2004 Elsevier Inc. All rights reserved.
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页码:84 / 92
页数:9
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