1XV4

Solution structure of antimicrobial and endotoxin-neutralizing peptide Lf11 in SDS micelles


Experimental Data Snapshot

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

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural origin of endotoxin neutralization and antimicrobial activity of a lactoferrin-based peptide

Japelj, B.Pristovsek, P.Majerle, A.Jerala, R.

(2005) J.Biol.Chem. 280: 16955-16961

  • DOI: 10.1074/jbc.M500266200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Treatment of Gram-negative bacterial infections with antimicrobial agents can cause release of the endotoxin lipopolysaccharide (LPS), the potent initiator of sepsis, which is the major cause of mortality in intensive care units worldwide. Structural ...

    Treatment of Gram-negative bacterial infections with antimicrobial agents can cause release of the endotoxin lipopolysaccharide (LPS), the potent initiator of sepsis, which is the major cause of mortality in intensive care units worldwide. Structural information on peptides bound to LPS can lead to the development of more effective endotoxin neutralizers. Short linear antimicrobial and endotoxin-neutralizing peptide LF11, based on the human lactoferrin, binds to LPS, inducing a peptide fold with a "T-shaped" arrangement of a hydrophobic core and two clusters of basic residues that match the distance between the two phosphate groups of LPS. Side chain arrangement of LF11 bound to LPS extends the previously proposed LPS binding pattern, emphasizing the importance of both electrostatic and hydrophobic interactions in a defined geometric arrangement. In anionic micelles, the LF11 forms amphipathic conformation with a smaller hydrophobic core than in LPS, whereas in zwitterionic micelles, the structure is even less defined. Protection of tryptophan fluorescence quenching in the order SDS>LPS>DPC and hydrogen exchange protection indicates the decreasing extent of insertion of the N terminus and potential role of peptide plasticity in differentiation between bacterial and eukaryotic membranes.


    Organizational Affiliation

    Department of Biotechnology, National Institute of Chemistry, 1000 Ljubljana, Slovenia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
lactoferrin-based synthetic peptide FQWQRNIRKVR
A
12Homo sapiensMutation(s): 0 
Gene Names: LTF (GIG12, LF)
EC: 3.4.21.-
Find proteins for P02788 (Homo sapiens)
Go to Gene View: LTF
Go to UniProtKB:  P02788
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
NH2
Query on NH2
A
NON-POLYMERH2 N

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Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 20 
  • Conformers Submitted: 
  • Selection Criteria: target function 
  • Olderado: 1XV4 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-03-22
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance