Photosensitizer and polycationic peptide-labeled streptavidin as a nano-carrier for light-controlled protein transduction

Kosuke Minamihata, Yasukazu Maeda, Satoshi Yamaguchi, Wataru Ishihara, Akira Ishiwatari, Satoshi Takamori, Shinya Yamahira, Teruyuki Nagamune

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Transductions of exogenous proteins into cells enable the precise study of the effect of the transduced proteins on cellular functions. Accordingly, the protein transduction technique, which can control the release of proteins into the cytosol with certainty and high-throughput, is highly desired in various research fields. In this study, streptavidin (SA) labeled with a photosensitizer and cell-permeable peptides (CPP) was proposed as a nano-carrier for light-controlled protein transduction. SA was modified with biotinylated oligo-arginine peptides (Rpep), which were functionalized with Alexa Fluor 546 (AF546), to achieve cell penetrating and endosomal escape functionalities. The SA-Rpep complex was efficiently internalized into living HeLa cells corresponding to the length and the modification number of Rpep. SA conjugated with more than three equimolar AF546-modified Rpep consisting of fifteen arginine residues was achieved to diffuse throughout the cytosol without cytotoxicity by irradiation of the excitation light for AF546. The optimized nano-carrier was confirmed to transduce a biotinylated model cargo protein, enhanced green fluorescent protein fused with thioredoxin (tEGFP) into the cytosol at the light-irradiated area. The results provided proof-of-principle that SA possessing multiple AF546-modified Rpep has the potential to be a versatile and facile carrier for light-controlled protein transduction into the cytosol of mammalian cells.

Original languageEnglish
Pages (from-to)630-636
Number of pages7
JournalJournal of Bioscience and Bioengineering
Volume120
Issue number6
DOIs
Publication statusPublished - Dec 2015
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Bioengineering
  • Applied Microbiology and Biotechnology

Fingerprint Dive into the research topics of 'Photosensitizer and polycationic peptide-labeled streptavidin as a nano-carrier for light-controlled protein transduction'. Together they form a unique fingerprint.

Cite this