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Solid-Phase Refolding of Inclusion Body Protein in Packed Bed Adsorption and Expanded Bed Adsorption Chromatography  

최원찬 (한양대학교 화학공학과 생물공정연구실)
김민영 (한양대학교 화학공학과 생물공정연구실)
서창우 (한양대학교 화학공학과 생물공정연구실)
이은규 (한양대학교 화학공학과 생물공정연구실)
Publication Information
KSBB Journal / v.18, no.6, 2003 , pp. 500-505 More about this Journal
Abstract
‘LK (lipoprotein kringle) 68’is a polypeptide of a modified ansiostatin consisting of three kringle structures that might be clinically useful as a potential cancer therapeutics. It can be produced by overexpressing it as inclusion body in recombinant E. coli. In this study, solid-phase refolding processes using packed bed adsorption (PBA) and expanded bed adsorption (EBA) column were carried out to compare their refolding yields with that of the conventional, solution-phase refolding process, For the solution-phase and the PBA-mediated processes employing Q-Sepharose, washed inclusion body was used as the starting material, whereas both washed inclusion body and E. coli homogenate were used for the EBA-mediated process employing streamline DEAE. On the final recovery LK68 per unit mass of wet cell basis, the EBA- and PBA-mediated processes showed about 2.7- and 1.5-fold higher yields, respectively, than the solution-phase refolding method. The solid-phase refolded LK68 demonstrated the same Iysine binding bioactivity and the retention time in the RP-and SEC-HPLC as those of the native protein.
Keywords
Inclusion body; solid-phase refolding; renaturation; angiostatin; expanded bed adsorption chromatography;
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Times Cited By KSCI : 1  (Citation Analysis)
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