title: Differential membrane perturbation caused by the cell penetrating peptide Tp10 depending on attached cargo.
abstract: The membrane leakage caused by the cell penetrating peptide Tp10, a variant of transportan, was studied in large unilamellar vesicles with the entrapped fluorophore calcein. The vesicles were composed of zwitterionic 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine. A significant decrease in membrane leakage was found when the 55kDa streptavidin protein was attached to Tp10. When a 5.4kDa peptide nucleic acid molecule was attached, the membrane leakage was comparable to that caused by Tp10 alone. The results suggest that direct membrane effects may cause membrane translocation of Tp10 alone and of smaller complexes, whereas these effects do not contribute for larger cargoes.
authors.affiliation: Department of Biochemistry and Biophysics, The Arrhenius Laboratories, Stockholm University, S-10691 Stockholm, Sweden.
authors.forename: Elsa
authors.initials: E
authors.lastname: Bárány-Wallje
authors.forename: Jugnu
authors.initials: J
authors.lastname: Gaur
authors.forename: Pontus
authors.initials: P
authors.lastname: Lundberg
authors.forename: Ulo
authors.initials: U
authors.lastname: Langel
authors.forename: Astrid
authors.initials: A
authors.lastname: Gräslund
mesh_terms: D000818:Animals; D001483:Base Sequence; D005452:Fluoresceins / Q000378:metabolism; D019004:Galanin / Q000378:metabolism*; D019476:Insect Proteins / Q000378:metabolism; D036341:Intercellular Signaling Peptides and Proteins; D010446:Peptide Fragments / Q000378:metabolism*; D020135:Peptide Nucleic Acids / Q000737:chemistry / Q000378:metabolism; D010455:Peptides / Q000378:metabolism; D010743:Phospholipids / Q000737:chemistry / Q000378:metabolism; D011993:Recombinant Fusion Proteins / Q000378:metabolism*; D013050:Spectrometry, Fluorescence; D014862:Wasp Venoms / Q000378:metabolism*; D014863:Wasps
chemical_list: D005452:Fluoresceins; D019476:Insect Proteins; D036341:Intercellular Signaling Peptides and Proteins; D010446:Peptide Fragments; D020135:Peptide Nucleic Acids; D010455:Peptides; D010743:Phospholipids; D011993:Recombinant Fusion Proteins; D014862:Wasp Venoms; C110068:transportan; C037500:mastoparan; D019004:Galanin; C007740:fluorexon