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Construction and functional study of a cell penetrating peptide-based expression vector for targeted delivery of proteins into the cell nuclei / 南方医科大学学报
Journal of Southern Medical University ; (12): 1394-1407, 2006.
Article Dans Chinois | WPRIM | ID: wpr-232878
ABSTRACT
<p><b>OBJECTIVE</b>To construct an cell penetrating peptide-based expression vector capable of targeted delivery of proteins into the cell nuclei and study its function of protein transduction.</p><p><b>METHODS</b>The fusion protein expression vector pET14b-HC(L)NE (pET14-b-His-CPP-Linker-NLS-EGFP) incorporating cell penetrating peptide (CPP), nuclear localization signal(NLS), linker and enhanced green fluorescent protein (EGFP) was constructed based on His-tagged pET14b-HE (pET14b-His-EGFP) by site-directed mutagenesis PCR method. After identification by enzyme digestion and DNA sequencing, the recombinant plasmid was transformed into BL21(DE(3)) strain. The HC(L)NE fusion protein was expressed following IPTG induction and purified with Ni(2+)-NTA affinity chromatography. After dialysis and filtration, the HC(L)NE fusion protein was added into cultured eukaryotic cells. The protein transduction in the living cells was observed under fluorescence microscope and analyzed by Western blotting.</p><p><b>RESULTS</b>Enzyme digestion and DNA sequencing confirmed successful construction of the pET14b-HC(L)NE vector, and the fusion protein efficiently expressed in E. coli. Protein transduction experiments in eukaryotic cells revealed that the fusion protein could rapidly penetrate the cell membrane and reach the cell nucleus, and this internalization was time- and concentration-dependent.</p><p><b>CONCLUSION</b>The cell penetrating peptide-based expression vector for targeted protein delivery to the cell nucleus has been successfully constructed, and a transport system that can delivery exogenous proteins or polypeptides into the cytoplasm and cell nucleus is established, which provides an economical and efficient means for functional study of the proteins and polypeptide in cells and targeted drug delivery.</p>
Sujets)
Texte intégral: Disponible Indice: WPRIM (Pacifique occidental) Sujet Principal: Peptides / Protéines de fusion recombinantes / Cellules HeLa / Transfection / Lignée cellulaire / Membrane cellulaire / Noyau de la cellule / Chlorocebus aethiops / Technique de Western / Cellules COS Limites du sujet: Animaux / Humains langue: Chinois Texte intégral: Journal of Southern Medical University Année: 2006 Type: Article

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Texte intégral: Disponible Indice: WPRIM (Pacifique occidental) Sujet Principal: Peptides / Protéines de fusion recombinantes / Cellules HeLa / Transfection / Lignée cellulaire / Membrane cellulaire / Noyau de la cellule / Chlorocebus aethiops / Technique de Western / Cellules COS Limites du sujet: Animaux / Humains langue: Chinois Texte intégral: Journal of Southern Medical University Année: 2006 Type: Article