skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Interaction of the Antimicrobial Peptide Aurein 1.2 and Charged Lipid Bilayer

Journal Article · · Scientific Reports
 [1]; ORCiD logo [2]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Biology & Soft Matter Division
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Biology & Soft Matter Division; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Structural Molecular Biology (CSMB)

Aurein 1.2 is a potent antimicrobial peptide secreted by frog Litoria aurea. As a short membrane-active peptide with only 13 amino acids in sequence, it has been found to be residing on the surface of lipid bilayer and permeabilizing bacterial membranes at high concentration. However, the detail at the molecular level is largely unknown. Here in this study, we investigated the action of Aurein 1.2 in charged lipid bilayers composed of DMPC/DMPG. Oriented Circular Dichroism results showed that the peptide was on the surface of lipid bilayer regardless of the charged lipid ratio. Only at a very high peptide-to-lipid ratio (~1/10), the peptide became perpendicular to the bilayer, however no pore was detected by neutron in-plane scattering. To further understand how it interacted with charged lipid bilayers, we employed Small Angle Neutron Scattering to probe lipid distribution across bilayer leaflets in lipid vesicles. The results showed that Aurein 1.2 interacted strongly with negatively charged DMPG, causing strong asymmetry in lipid bilayer. At high concentration, while the vesicles were intact, we found additional structure feature on the bilayer. Finally, our study provides a glimpse into how Aurein 1.2 disturbs anionic lipid-containing membranes without pore formation.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Structural Molecular Biology (CSMB)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1364315
Journal Information:
Scientific Reports, Vol. 7, Issue 1; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 23 works
Citation information provided by
Web of Science

References (45)

Antimicrobial Peptide Pores in Membranes Detected by Neutron In-Plane Scattering journal December 1995
The Interaction of Melittin with Dimyristoyl Phosphatidylcholine-Dimyristoyl Phosphatidylserine Lipid Bilayer Membranes journal November 2016
Circular dichroism of oriented α helices. I. Proof of the exciton theory journal August 1988
Oriented Circular Dichroism: A Method to Characterize Membrane-Active Peptides in Oriented Lipid Bilayers journal January 2016
The antibiotic and anticancer active aurein peptides from the Australian Bell Frogs Litoria aurea and Litoria raniformis: The solution structure of aurein 1.2 journal September 2000
Membrane Thinning Due to Antimicrobial Peptide Binding: An Atomic Force Microscopy Study of MSI-78 in Lipid Bilayers journal December 2005
Specific and Selective Peptide-Membrane Interactions Revealed Using Quartz Crystal Microbalance journal December 2007
Mantid—Data analysis and visualization package for neutron scattering and μ SR experiments
  • Arnold, O.; Bilheux, J. C.; Borreguero, J. M.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 764 https://doi.org/10.1016/j.nima.2014.07.029
journal November 2014
Alamethicin Disrupts the Cholesterol Distribution in Dimyristoyl Phosphatidylcholine–Cholesterol Lipid Bilayers journal September 2014
Antimicrobial peptides of multicellular organisms journal January 2002
Structures of Human Host Defense Cathelicidin LL-37 and Its Smallest Antimicrobial Peptide KR-12 in Lipid Micelles journal September 2008
Dual Mechanism of Bacterial Lethality for a Cationic Sequence-Random Copolymer that Mimics Host-Defense Antimicrobial Peptides journal May 2008
Transmembrane Pores Formed by Human Antimicrobial Peptide LL-37 journal April 2011
Melittin-induced cholesterol reorganization in lipid bilayer membranes journal October 2015
Bilayer Thickness Mismatch Controls Domain Size in Model Membranes journal February 2013
Discovery and Characterization of a Peptide That Enhances Endosomal Escape of Delivered Proteins in Vitro and in Vivo journal October 2015
Structure of transmembrane pore induced by Bax-derived peptide: Evidence for lipidic pores journal November 2008
Membrane defects enhance the interaction of antimicrobial peptides, aurein 1.2 versus caerin 1.1 journal August 2013
Real-time quantitative analysis of lipid disordering by aurein 1.2 during membrane adsorption, destabilisation and lysis journal October 2010
Phospholipids and the origin of cationic gating charges in voltage sensors journal November 2006
Effect of dimerization on the mechanism of action of aurein 1.2 journal June 2016
Peptide-Induced Asymmetric Distribution of Charged Lipids in a Vesicle Bilayer Revealed by Small-Angle Neutron Scattering journal August 2011
Action of Antimicrobial Peptides:  Two-State Model journal July 2000
Controls and constrains of the membrane disrupting action of Aurein 1.2 journal November 2015
Neutron scattering lengths and cross sections journal January 1992
NMR studies of aurein 1.2 analogs journal September 2006
Structure of the Alamethicin Pore Reconstructed by X-Ray Diffraction Analysis journal May 2008
Energetics of Pore Formation Induced by Membrane Active Peptides journal March 2004
The Bio-SANS instrument at the High Flux Isotope Reactor of Oak Ridge National Laboratory journal June 2014
Molecular structures of fluid phase phosphatidylglycerol bilayers as determined by small angle neutron and X-ray scattering journal September 2012
UCSF Chimera?A visualization system for exploratory research and analysis journal January 2004
Antimicrobial Peptides Share a Common Interaction Driven by Membrane Line Tension Reduction journal November 2016
Interaction of the antimicrobial peptides caerin 1.1 and aurein 1.2 with intact bacteria by 2 H solid-state NMR journal December 2016
Solution Structures of Human LL-37 Fragments and NMR-Based Identification of a Minimal Membrane-Targeting Antimicrobial and Anticancer Region journal May 2006
The antimicrobial peptide aurein 1.2 disrupts model membranes via the carpet mechanism journal January 2012
Mechanism of the binding, insertion and destabilization of phospholipid bilayer membranes by α-helical antimicrobial and cell non-selective membrane-lytic peptides journal December 1999
Barrel-Stave Model or Toroidal Model? A Case Study on Melittin Pores journal September 2001
Direct measurement of the interaction between phosphatidylglycerol bilayers in aqueous electrolyte solutions journal November 1986
Method of oriented circular dichroism journal April 1990
Phospholipid Component Volumes: Determination and Application to Bilayer Structure Calculations journal August 1998
Physical properties of the fluid lipid-bilayer component of cell membranes: a perspective journal August 1991
Phosphatidylglycerol Directs Binding and Inhibitory Action of EIIA Glc Protein on the Maltose Transporter journal July 2013
Correlation of Three-dimensional Structures with the Antibacterial Activity of a Group of Peptides Designed Based on a Nontoxic Bacterial Membrane Anchor journal November 2004
Molecular structures of fluid phase phosphatidylglycerol bilayers as determined by small angle neutron and X-ray scattering. text January 2012
Direct determination of the number-weighted mean radius and polydispersity from dynamic light-scattering data journal January 2006

Cited By (5)

Intracellular delivery of therapeutic antibodies into specific cells using antibody-peptide fusions journal December 2019
Resolving the structural interactions between antimicrobial peptides and lipid membranes using small-angle scattering methods: the case of indolicidin journal January 2018
Biophysical investigation into the antibacterial action of modelin-5-NH 2 journal January 2019
Interaction of phospholipid vesicles with gemini surfactants of different lysine spacer lengths journal January 2019
Could Cardiolipin Protect Membranes against the Action of Certain Antimicrobial Peptides? Aurein 1.2, a Case Study journal December 2018