|
1
|
Pérez-López S, Vila-Romeu N, Alsina Esteller MA, Espina M, Haro I, Mestres C. Interaction of GB Virus C/Hepatitis G Virus Synthetic Peptides with Lipid Langmuir Monolayers and Large Unilamellar Vesicles. J Phys Chem B 2008; 113:319-27. [DOI: 10.1021/jp806938y] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Silvia Pérez-López
- Department of Physical Chemistry, Faculty of Pharmacy, University of Barcelona, Av. Joan XXIII s/n, 08028 Barcelona, Spain, Department of Physical Chemistry, Faculty of Sciences, University of Vigo, Campus of Ourense, 32004 Ourense, Spain, and Unit of Synthesis and Biomedical Application of Peptides, Department of Biomedical Chemistry, IQAC-CSIC, Barcelona, Spain
| | - Nuria Vila-Romeu
- Department of Physical Chemistry, Faculty of Pharmacy, University of Barcelona, Av. Joan XXIII s/n, 08028 Barcelona, Spain, Department of Physical Chemistry, Faculty of Sciences, University of Vigo, Campus of Ourense, 32004 Ourense, Spain, and Unit of Synthesis and Biomedical Application of Peptides, Department of Biomedical Chemistry, IQAC-CSIC, Barcelona, Spain
| | - M. Asunción Alsina Esteller
- Department of Physical Chemistry, Faculty of Pharmacy, University of Barcelona, Av. Joan XXIII s/n, 08028 Barcelona, Spain, Department of Physical Chemistry, Faculty of Sciences, University of Vigo, Campus of Ourense, 32004 Ourense, Spain, and Unit of Synthesis and Biomedical Application of Peptides, Department of Biomedical Chemistry, IQAC-CSIC, Barcelona, Spain
| | - Marta Espina
- Department of Physical Chemistry, Faculty of Pharmacy, University of Barcelona, Av. Joan XXIII s/n, 08028 Barcelona, Spain, Department of Physical Chemistry, Faculty of Sciences, University of Vigo, Campus of Ourense, 32004 Ourense, Spain, and Unit of Synthesis and Biomedical Application of Peptides, Department of Biomedical Chemistry, IQAC-CSIC, Barcelona, Spain
| | - Isabel Haro
- Department of Physical Chemistry, Faculty of Pharmacy, University of Barcelona, Av. Joan XXIII s/n, 08028 Barcelona, Spain, Department of Physical Chemistry, Faculty of Sciences, University of Vigo, Campus of Ourense, 32004 Ourense, Spain, and Unit of Synthesis and Biomedical Application of Peptides, Department of Biomedical Chemistry, IQAC-CSIC, Barcelona, Spain
| | - Concepció Mestres
- Department of Physical Chemistry, Faculty of Pharmacy, University of Barcelona, Av. Joan XXIII s/n, 08028 Barcelona, Spain, Department of Physical Chemistry, Faculty of Sciences, University of Vigo, Campus of Ourense, 32004 Ourense, Spain, and Unit of Synthesis and Biomedical Application of Peptides, Department of Biomedical Chemistry, IQAC-CSIC, Barcelona, Spain
| |
Collapse
|
|
2
|
Hinz A, Galla HJ. Viral membrane penetration: lytic activity of a nodaviral fusion peptide. Eur Biophys J 2005; 34:285-93. [PMID: 15834560 DOI: 10.1007/s00249-004-0450-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2004] [Revised: 11/19/2004] [Accepted: 11/22/2004] [Indexed: 11/30/2022]
Abstract
The auto-cleavage product from the C-terminal part of the capsid protein of the flock house virus, namely the gamma(1) peptide, was used as a model peptide to characterize the initial steps of viral membrane penetration. Monolayers at the air-water interface were used to investigate the phase behaviour of ternary lipid-peptide mixtures, whereas solid-supported membranes were used to visualize the lytic activity of the gamma(1) peptide. 1,2-Dipalmitoyl-sn-glycero-phospatidylcholine/1,2-dipalmitoyl-sn-glycero-phospatidylserine (4:1) membranes were used as negatively charged model membranes. By means of film balance techniques lipid/peptide discrimination was found resulting in a lipid-rich and a peptide-rich phase. Quartz crystal microbalance and scanning force microscopy experiments led to the conclusion of a detergent-like mechanism of the gamma(1) peptide resulting in mixed lipid-peptide micelles with a molar ratio of 2.8:1. A monolayer adsorption with an ongoing lysis of membranes was found with gamma(1) peptide molecules interacting at membrane defects.
Collapse
Affiliation(s)
- Andreas Hinz
- Institut für Biochemie, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Strasse 2, 48149 Münster, Germany.
| | | |
Collapse
|
|
4
|
Sospedra P, Prat J, Haro I, Mestres C, Busquets MA. Interaction study of peptide from VP3 capsid protein of hepatitis A virus through monolayers and fluorescence spectroscopy. LUMINESCENCE 2001; 16:103-7. [PMID: 11312535 DOI: 10.1002/bio.634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A synthetic peptide with the sequence [Lys113]VP3(110--121): FWRKDLVFDFQV, corresponding to an epitope of the VP3 capsid protein of hepatitis A virus (HAV), was synthesized by solid phase and characterized. To obtain insight into its physicochemical properties and to understand its possible mechanism of action at the membrane level, interaction with DPPC or DPPC/DPPG (95/5) liposomes and lipid monolayers of DPPC, DPPG, SA, PS, PA and SM were studied by fluorescence spectroscopy and Langmuir--Blotgett films technique, respectively. Fluorescence studies showed that the peptide was in a hydrophobic environment when DPPC liposomes were used. The addition of a 5% of a charged lipid, DPPG, to the preparations changed the preference of the peptide towards a polar surrounding. However, the peptide had a high surface activity (nmol/L) and was able to incorporate into lipid monolayers. Interaction was higher with charged phospholipids than with neutral ones. These results may have physiological significance in the mechanism of infection of host hepatic cells by HAV.
Collapse
Affiliation(s)
- P Sospedra
- Physical Chemistry Department, Faculty of Pharmacy, University of Barcelona, Avgda Joan XXIII, s/n. 08028 Barcelona, Spain
| | | | | | | | | |
Collapse
|