6TWG

Solution structure of antimicrobial peptide, crabrolin Plus in the presence of Lipopolysaccharide


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: target function 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Effect of positive charges in the structural interaction of crabrolin isoforms with lipopolysaccharide.

Cantini, F.Luzi, C.Bouchemal, N.Savarin, P.Bozzi, A.Sette, M.

(2020) J Pept Sci 26: e3271-e3271

  • DOI: 10.1002/psc.3271
  • Primary Citation of Related Structures:  
    6TWG

  • PubMed Abstract: 
  • Antimicrobial peptides (AMPs) appear as chemical compounds of increasing interest for their role in killing bacteria and, more recently, for their ability to bind endotoxin (lipopolysaccharide, LPS) that is released during bacterial infection and that may lead to septic shock ...

    Antimicrobial peptides (AMPs) appear as chemical compounds of increasing interest for their role in killing bacteria and, more recently, for their ability to bind endotoxin (lipopolysaccharide, LPS) that is released during bacterial infection and that may lead to septic shock. This dual role in the mechanism of action can further be enhanced in a synergistic way when two or more AMPs are combined together. Not all AMPs are able to bind LPS, suggesting that several modes of binding to the bacterial surface may exist. Here we analyze a natural AMP, crabrolin, and two mutated forms, one with increased positive charge (Crabrolin Plus) and the other with null charge (Crabrolin Minus), and compare their binding abilities to LPS. While Crabrolin WT as well Crabrolin Minus do not show binding to LPS, the mutated Crabrolin Plus exhibits binding and forms a well defined structure in the presence of LPS. The results strengthen the importance of positive charges for the binding to LPS and suggest the mutated form with increased positive charge as a promising candidate for antimicrobial and antiseptic activity.


    Organizational Affiliation

    Department of Chemical Sciences and Technology, University of Rome Tor Vergata, Rome, Italy.



Macromolecules

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Crabrolin Plus, mutant of Crabrolin peptideA13Vespa crabroMutation(s): 0 
UniProt
Find proteins for P01518 (Vespa crabro)
Explore P01518 
Go to UniProtKB:  P01518
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP01518
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: target function 
  • OLDERADO: 6TWG Olderado

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2020-07-22
    Type: Initial release
  • Version 1.1: 2020-08-19
    Changes: Database references