2L5R

Conformational and membrane interactins studies of antimicrobial peptide Alyteserin-1C


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Conformational and membrane interaction studies of the antimicrobial peptide alyteserin-1c and its analogue [E4K]alyteserin-1c.

Subasinghage, A.P.O'Flynn, D.Conlon, J.M.Hewage, C.M.

(2011) Biochim.Biophys.Acta 1808: 1975-1984

  • DOI: 10.1016/j.bbamem.2011.04.012

  • PubMed Abstract: 
  • Alyteserin-1c (GLKEIFKAGLGSLVKGIAAHVAS.NH(2)), first isolated from skin secretions of the midwife toad Alytes obstetricans, shows selective growth-inhibitory activity against Gram-negative bacteria. The structures of alyteserin-1c and its more potent ...

    Alyteserin-1c (GLKEIFKAGLGSLVKGIAAHVAS.NH(2)), first isolated from skin secretions of the midwife toad Alytes obstetricans, shows selective growth-inhibitory activity against Gram-negative bacteria. The structures of alyteserin-1c and its more potent and less haemolytic analogue [E4K]alyteserin-1c were investigated in various solution and membrane mimicking environments by proton NMR spectroscopy and molecular modelling. In aqueous solution, the peptide displays a lack of secondary structure but, in a 2,2,2-trifluoroethanol (TFE-d(3))-H(2)O solvent mixture, the structure is characterised by an extended alpha helix between residues Leu(2) and Val(21). Solution structural studies in the membrane mimicking environments, sodium dodecyl sulphate (SDS), dodecylphosphocholine (DPC), and 1,2-dihexanoyl-sn-glycero-3-phosphatidylcholine (DHPC) micelles, indicate that these peptides display an alpha helical structure between residues Lys(3) and Val(21). Positional studies of the peptides in SDS, DPC and DHPC media show that the N-terminal and central residues lie inside the micelle while C-terminal residues beyond Ala(19) do not interact with the micelles.


    Organizational Affiliation

    UCD School of Biomolecular and Biomedical Science, UCD Centre for Synthesis and Chemical Biology, UCD Conway institute, University College Dublin, Belfield, Dublin 4, Ireland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Antimicrobial peptide Alyteserin-1C
A
23Alytes obstetricansMutation(s): 0 
Find proteins for H0USY4 (Alytes obstetricans)
Go to UniProtKB:  H0USY4
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 
  • Olderado: 2L5R Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-11-23
    Type: Initial release
  • Version 1.1: 2012-06-20
    Type: Database references