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Direct Protein Delivery to Mammalian Cells Using Cell-permeable Cys2-His2 Zinc-finger Domains
Published on: March 25, 2015
Gramicidin A-based peptide vector for intracellular protein delivery
Tatiana B Stoilova1, Sergey I Kovalchuk, Natalya S Egorova
1Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry Russian Academy of Sciences, Miklukho-Maklaya, 16/10, 117997 Moscow, Russia. stoilova@transfection.ru
Biochimica Et Biophysica Acta
|March 15, 2008
Summary
Researchers developed new peptide vectors for delivering proteins into cells. A specific peptide, P10C, effectively transported beta-galactosidase into eukaryotic cells via noncovalent association.
Area of Science:
- Biochemistry
- Molecular Biology
- Biotechnology
Background:
- Peptide-based vectors offer novel strategies for intracellular delivery of macromolecules.
- Cell-penetrating peptides (CPPs) like Pep-1 facilitate cellular uptake without covalent linkage.
- Gramicidin A serves as a basis for developing new membrane-active amphipathic peptides.
Purpose of the Study:
- To investigate the efficacy of gramicidin A-based peptides in transporting proteins across eukaryotic cell membranes.
- To identify specific peptide sequences that enhance intracellular protein delivery.
- To explore the mechanism of peptide-protein interaction during delivery.
Main Methods:
- Synthesis and characterization of a series of membrane-active amphipathic peptides based on gramicidin A.
- Utilizing beta-galactosidase as a model protein for delivery studies.
- Electrophoresis and enzymatic activity assays to confirm peptide-protein complex formation.
Main Results:
- The positively charged, Cys-containing peptide P10C showed the highest efficiency in delivering beta-galactosidase intracellularly.
- Electrophoresis and enzymatic assays confirmed noncovalent association between P10C and beta-galactosidase.
- Modifications to the N-terminus of gramicidin analogues influenced protein transduction efficiency.
Conclusions:
- Peptide P10C is a highly effective vector for noncovalent intracellular delivery of proteins.
- Gramicidin A-derived peptides represent a promising class of agents for macromolecule delivery.
- Further research into N-terminus modifications can optimize peptide-based delivery systems.
