Construction of Escherichia coli Mutant with Decreased Endotoxic Activity by Modifying Lipid A Structure.
Construction of Escherichia coli Mutant with Decreased Endotoxic Activity by Modifying Lipid A Structure.
复制标题
脂质A结构修饰内毒素活性降低的大肠杆菌突变体的构建
DOI:
10.3390/md13063388
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发表时间:
2015-05-27
期刊:
影响因子:
5.4
通讯作者:
Kong Q
中科院分区:
文献类型:
--
作者:
Liu Q;Li Y;Zhao X;Yang X;Liu Q;Kong Q
Escherichia coli BL21 (DE3) and its derivatives are widely used for the production of recombinant proteins, but these purified proteins are always contaminated with lipopolysaccharide (LPS). LPS is recognized by the toll-like receptor 4 and myeloid differentiation factor 2 complex of mammalian immune cells and leads to release of pro-inflammatory cytokines. It is a vital step to remove LPS from the proteins before use for therapeutic purpose. In this study, we constructed BL21 (DE3) ∆msbB28 ∆pagP38 mutant, which produces a penta-acylated LPS with reduced endotoxicity. The plasmids harboring pagL and/or lpxE were then introduced into this mutant to further modify the LPS. The new strain (S004) carrying plasmid pQK004 (pagL and lpxE) produced mono-phosphoryated tetra-acylated lipid A, which induces markedly less production of tumor necrosis factor-α in the RAW264.7 and IL-12 in the THP1, but still retains ability to produce recombinant proteins. This study provides a strategy to decrease endotoxic activity of recombinant proteins purified from E. coli BL21 backgrounds and a feasible approach to modify lipid A structure for alternative purposes such as mono-phosphoryl lipid A (MPL) as vaccine adjuvants.
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影响因子:
4.8
作者:
Brown, Dusty B.;Muszynski, Artur;Carlson, Russell W.
通讯作者:
Carlson, Russell W.
影响因子:
4.8
作者:
Jia, WY;El Zoeiby, A;Bishop, RE
通讯作者:
Bishop, RE
DOI:
10.1111/j.1432-1033.1985.tb08798.x
发表时间:
1985-01-01
期刊:
EUROPEAN JOURNAL OF BIOCHEMISTRY
影响因子:
--
作者:
GALANOS, C;LUDERITZ, O;SHIBA, T
通讯作者:
SHIBA, T
影响因子:
3.5
作者:
GALAN, JE;NAKAYAMA, K;CURTISS, R
通讯作者:
CURTISS, R
影响因子:
2.2
作者:
Cognet, I;de Coignac, AB;Gauchat, JF
通讯作者:
Gauchat, JF