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pubmed-article:18589832pubmed:dateCreated2008-6-30lld:pubmed
pubmed-article:18589832pubmed:abstractTextNerve growth factor (NGF) promotes neuronal survival and differentiation and stimulates neurite outgrowth. NGF is synthesized as a precursor-proNGF in vivo. In this paper, a pET-proNGF prokaryocyte expression vector was constructed and transformed into E. coli BL21(DE3)pLysS. The proNGF was expressed in the form of non-active aggregated monomer in E. coli after induction with IPTG. SDS-PAGE revealed the proNGF expression product had a Mr.30.2 kD. Western blotting analysis showed that the protein had good antigenicity. Fusion protein was successfully purified by Ni2+-NTA affinity chromatography and cleaved by Enterokinase and 13.1 mg proNGF was obtained from 100 mL cell culture in a typical experiment. The protein was dialyzed in a redox system containing reduced and oxidized glutathione. RP-HPLC was used to analysis the result of the refolding. The refolded proNGF protein can induce neurite outgrowth of PC12 cells, which indicated that pro-form of NGF we obtained had biological activity.lld:pubmed
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pubmed-article:18589832pubmed:statusMEDLINElld:pubmed
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pubmed-article:18589832pubmed:issn1000-3061lld:pubmed
pubmed-article:18589832pubmed:authorpubmed-author:HeBingBlld:pubmed
pubmed-article:18589832pubmed:authorpubmed-author:ZhaoJuanJlld:pubmed
pubmed-article:18589832pubmed:authorpubmed-author:JiangHanminHlld:pubmed
pubmed-article:18589832pubmed:authorpubmed-author:ChaiXinjunXlld:pubmed
pubmed-article:18589832pubmed:authorpubmed-author:YuXindaXlld:pubmed
pubmed-article:18589832pubmed:issnTypePrintlld:pubmed
pubmed-article:18589832pubmed:volume24lld:pubmed
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pubmed-article:18589832pubmed:pagination509-14lld:pubmed
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pubmed-article:18589832pubmed:year2008lld:pubmed
pubmed-article:18589832pubmed:articleTitle[Expression, purification and renaturation of proNGF in Escherichia coli].lld:pubmed
pubmed-article:18589832pubmed:affiliationCollege of Life Sciences, Nankai University, Tianjin 300071, China.lld:pubmed
pubmed-article:18589832pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:18589832pubmed:publicationTypeEnglish Abstractlld:pubmed
pubmed-article:18589832pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed