Premium
Recombinant turnip yellow mosaic virus coat protein as a potential nanocarrier
Author(s) -
Tan F.H.,
Kong J.C.,
Ng J.F.,
Alitheen N.B.,
Wong C.L.,
Yong C.Y.,
Lee K.W.
Publication year - 2021
Publication title -
journal of applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 1364-5072
DOI - 10.1111/jam.15048
Subject(s) - guanidine , recombinant dna , peptide , chemistry , denaturation (fissile materials) , fusion protein , escherichia coli , dynamic light scattering , biochemistry , biophysics , biology , nuclear chemistry , nanoparticle , materials science , nanotechnology , gene
Abstract Aims To display a short peptide (GSRS) at the C‐terminal end of turnip yellow mosaic virus coat protein (TYMVc) and to study its assembly into virus‐like particles (TYMVcHis 6 VLPs). Methods and Results In this study, recombinant TYMVcHis 6 expressed in Escherichia coli self‐assembled into VLPs of approximately 30–32 nm. SDS‐PAGE and Western blot analysis of protein fractions from the immobilized metal affinity chromatography (IMAC) showed that TYMVcHis 6 VLPs interacted strongly with nickel ligands in IMAC column, suggesting that the fusion peptide is protruding out from the surface of VLPs. These VLPs are highly stable over a wide pH range from 3·0 to 11·0 at different temperatures. At pH 11·0, specifically, the VLPs remained intact up to 75°C. Additionally, the disassembly and reassembly of TYMVcHis 6 VLPs were studied in vitro . Dynamic light scattering and transmission electron microscopy analysis revealed that TYMVcHis 6 VLPs were dissociated by 7 mol l −1 urea and 2 mol l −1 guanidine hydrochloride (GdnHCl) without impairing their reassembly property. Conclusions A 10‐residue peptide was successfully displayed on the surface of TYMVcHis 6 VLPs. This chimera demonstrated high stability under extreme thermal conditions with varying pH and was able to dissociate and reassociate into VLPs by chemical denaturants. Significance and Impact of the Study This is the first C‐terminally modified TYMVc produced in E . coli . The C‐terminal tail which is exposed on the surface can be exploited as a useful site to display multiple copies of functional ligands. The ability of the chimeric VLPs to self‐assemble after undergo chemical denaturation indicates its potential role to serve as a nanocarrier for use in targeted drug delivery.