Abstract:
:Insoluble expression of intrinsically soluble proteins with native activity is potentially a promising alternative to soluble expression of folded protein or insoluble expression of unfolded protein requiring refolding. Here, we attempted to express highly soluble halophilic His-rich metal binding protein (HP) as insoluble inclusion bodies with native metal-binding activity using insolubilizing nona-peptide (Ins), GILQINSRW, derived from hen egg white lysozyme (His-InsHP). About 80% of expressed His-InsHP was localized in inclusion bodies in Na-phosphate/NaCl buffer, pH 7.4, while His-HP without Ins peptide was exclusively expressed in soluble supernatant. We report expression, purification and characterization of this insoluble His-InsHP, and its possible application for efficient biosorption and recovery of environmental metal ions, for example, by using whole bacterial cells expressing insoluble His-InsHP as a new cost-effective metal ion-adsorbent.
journal_name
Protein Expr Purifjournal_title
Protein expression and purificationauthors
Tokunaga M,Arakawa T,Tokunaga Y,Sugimoto Y,Ishibashi Mdoi
10.1016/j.pep.2019.01.001subject
Has Abstractpub_date
2019-04-01 00:00:00pages
50-57eissn
1046-5928issn
1096-0279pii
S1046-5928(18)30641-7journal_volume
156pub_type
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