Related ArticlesDetermining the mode of action involved in the antimicrobial activity of synthetic peptides: a solid-state NMR and FTIR study.
Biophys J. 2012 Oct 3;103(7):1470-9
Authors: Lorin A, Noël M, Provencher MÈ, Turcotte V, Cardinal S, Lagüe P, Voyer N, Auger M
Abstract
We have previously shown that leucine to lysine substitution(s) in neutral synthetic crown ether containing 14-mer peptide affect the peptide structure and its ability to permeabilize bilayers. Depending on the substitution position, the peptides adopt mainly either a ?-helical structure able to permeabilize dimyristoylphosphatidylcholine (DMPC) and dimyristoylphosphatidylglycerol (DMPG) vesicles (nonselective peptides) or an intermolecular ?-sheet structure only able to permeabilize DMPG vesicles (selective peptides). In this study, we have used a combination of solid-state NMR and Fourier transform infrared spectroscopy to investigate the effects of nonselective ?-helical and selective intermolecular ?-sheet peptides on both types of bilayers. (31)P NMR results indicate that both types of peptides interact with the headgroups of DMPC and DMPG bilayers. (2)H NMR and Fourier transform infrared results reveal an ordering of the hydrophobic core of bilayers when leakage is noted, i.e., for DMPG vesicles in the presence of both types of peptides and DMPC vesicles in the presence of nonselective peptides. However, selective peptides have no significant effect on the ordering of DMPC acyl chains. The ability of these 14-mer peptides to permeabilize lipid vesicles therefore appears to be related to their ability to increase the order of the bilayer hydrophobic core.
Solution and Solid-State NMR Structural Studies of Antimicrobial Peptides LPcin-I and LPcin-II.
Solution and Solid-State NMR Structural Studies of Antimicrobial Peptides LPcin-I and LPcin-II.
Solution and Solid-State NMR Structural Studies of Antimicrobial Peptides LPcin-I and LPcin-II.
Biophys J. 2011 Sep 7;101(5):1193-201
Authors: Park TJ, Kim JS, Ahn HC, Kim Y
Abstract
Lactophoricin (LPcin-I) is an antimicrobial, amphiphatic, cationic peptide with 23-amino acid residues isolated from bovine milk. Its analogous peptide, LPcin-II, lacks six N-terminal amino acids compared to LPcin-I. Interestingly, LPcin-II does not display any...
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09-06-2011 06:02 PM
Antimicrobial peptides and their superior fluorinated analogues: structure-activity relationships as revealed by NMR spectroscopy and MD calculations.
Antimicrobial peptides and their superior fluorinated analogues: structure-activity relationships as revealed by NMR spectroscopy and MD calculations.
Antimicrobial peptides and their superior fluorinated analogues: structure-activity relationships as revealed by NMR spectroscopy and MD calculations.
Chembiochem. 2010 Nov 22;11(17):2424-32
Authors: Díaz MD, Palomino-Schätzlein M, Corzana F, Andreu C, Carbajo RJ, del Olmo M, Canales-Mayordomo A, Pineda-Lucena A, Asensio G, Jiménez-Barbero J
The conformations of two synthetic pentapeptides with...
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05-04-2011 04:14 PM
Exploring platelet chemokine antimicrobial activity: NMR backbone dynamics studies of NAP-2 and TC-1.
Exploring platelet chemokine antimicrobial activity: NMR backbone dynamics studies of NAP-2 and TC-1.
Exploring platelet chemokine antimicrobial activity: NMR backbone dynamics studies of NAP-2 and TC-1.
Antimicrob Agents Chemother. 2011 Feb 14;
Authors: Nguyen LT, Kwakman PH, Chan DI, Liu Z, de Boer L, Zaat SA, Vogel HJ
The platelet chemokines NAP-2 and TC-1 differ by only two amino acids at their carboxy-terminal end. Nevertheless they display a significant difference in their direct antimicrobial activity, with the longer NAP-2 being inactive...
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02-16-2011 07:40 PM
Long-Term-Stable Ether-Lipid vs Conventional Ester-Lipid Bicelles in Oriented Solid-State NMR: Altered Structural Information in Studies of Antimicrobial Peptides.
Long-Term-Stable Ether-Lipid vs Conventional Ester-Lipid Bicelles in Oriented Solid-State NMR: Altered Structural Information in Studies of Antimicrobial Peptides.
Long-Term-Stable Ether-Lipid vs Conventional Ester-Lipid Bicelles in Oriented Solid-State NMR: Altered Structural Information in Studies of Antimicrobial Peptides.
J Phys Chem B. 2011 Feb 10;
Authors: Bertelsen K, Vad B, Nielsen EH, Hansen SK, Skrydstrup T, Otzen DE, Vosegaard T, Nielsen NC
Recently, ether lipids have been introduced as long-term stable alternatives to the more natural,...
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02-12-2011 05:26 PM
NMR structures of the histidine-rich peptide LAH4 in micellar environments: membrane insertion, pH-dependent mode of antimicrobial action, and DNA transfection.
NMR structures of the histidine-rich peptide LAH4 in micellar environments: membrane insertion, pH-dependent mode of antimicrobial action, and DNA transfection.
NMR structures of the histidine-rich peptide LAH4 in micellar environments: membrane insertion, pH-dependent mode of antimicrobial action, and DNA transfection.
Biophys J. 2010 Oct 20;99(8):2507-15
Authors: Georgescu J, Munhoz VH, Bechinger B
The LAH4 family of histidine-rich peptides exhibits potent antimicrobial and DNA transfection activities, both of which require interactions...
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02-02-2011 02:40 AM
[NMR paper] Membrane insertion of a lipidated ras peptide studied by FTIR, solid-state NMR, and n
Membrane insertion of a lipidated ras peptide studied by FTIR, solid-state NMR, and neutron diffraction spectroscopy.
Related Articles Membrane insertion of a lipidated ras peptide studied by FTIR, solid-state NMR, and neutron diffraction spectroscopy.
J Am Chem Soc. 2003 Apr 9;125(14):4070-9
Authors: Huster D, Vogel A, Katzka C, Scheidt HA, Binder H, Dante S, Gutberlet T, Zschörnig O, Waldmann H, Arnold K
Membrane binding of a doubly lipid modified heptapeptide from the C-terminus of the human N-ras protein was studied by Fourier transform...
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11-24-2010 09:01 PM
[NMR paper] Activity and NMR structure of synthetic peptides of the bovine ATPase inhibitor prote
Activity and NMR structure of synthetic peptides of the bovine ATPase inhibitor protein, IF1.
Related Articles Activity and NMR structure of synthetic peptides of the bovine ATPase inhibitor protein, IF1.
Peptides. 2002 Dec;23(12):2127-41
Authors: de Chiara C, Nicastro G, Spisni A, Zanotti F, Cocco T, Papa S
The protein IF(1) is a natural inhibitor of the mitochondrial F(o)F(1)-ATPase. Many investigators have been prompted to identify the shortest segment of IF(1), retaining its native activity, for use in biomedical applications. Here, the...
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11-24-2010 08:58 PM
Postdoc position in solid-state NMR: Determining biomolecular structure at the interf
Postdoc position in solid-state NMR: Determining biomolecular structure at the interface of structural and cellular biology
Description of the Faculty / Research group
The Faculty of Science consists of six departments: Biology, Pharmaceutical Sciences, Information and Computing Sciences, Physics and Astronomy, Mathematics and Chemistry. The Faculty is home to 3500 students and nearly 2000 staff and is internationally renowned for the quality of its research.
The NMR Research Group is part of the Chemistry Department (Universiteit Utrecht fac. Scheikunde) and...
Determining the mode of action involved in the antimicrobial activity of synthetic peptides: a solid-state NMR and FTIR study.
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