6S6M

Crystal structure of the human LL37(17-29) antimicrobial peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.35 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.232 
  • R-Value Observed: 0.236 

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This is version 1.0 of the entry. See complete history


Literature

The Human LL-37(17-29) antimicrobial peptide reveals a functional supramolecular structure.

Engelberg, Y.Landau, M.

(2020) Nat Commun 11: 3894-3894

  • DOI: 10.1038/s41467-020-17736-x
  • Primary Citation of Related Structures:  
    6S6M, 6S6N

  • PubMed Abstract: 
  • Here, we demonstrate the self-assembly of the antimicrobial human LL-37 active core (residues 17-29) into a protein fibril of densely packed helices. The surface of the fibril encompasses alternating hydrophobic and positively charged zigzagged belts, which likely underlie interactions with and subsequent disruption of negatively charged lipid bilayers, such as bacterial membranes ...

    Here, we demonstrate the self-assembly of the antimicrobial human LL-37 active core (residues 17-29) into a protein fibril of densely packed helices. The surface of the fibril encompasses alternating hydrophobic and positively charged zigzagged belts, which likely underlie interactions with and subsequent disruption of negatively charged lipid bilayers, such as bacterial membranes. LL-37 17-29 correspondingly forms wide, ribbon-like, thermostable fibrils in solution, which co-localize with bacterial cells. Structure-guided mutagenesis analyses supports the role of self-assembly in antibacterial activity. LL-37 17-29 resembles, in sequence and in the ability to form amphipathic helical fibrils, the bacterial cytotoxic PSMα3 peptide that assembles into cross-α amyloid fibrils. This argues helical, self-assembling, basic building blocks across kingdoms of life and points to potential structural mimicry mechanisms. The findings expose a protein fibril which performs a biological activity, and offer a scaffold for functional and durable biomaterials for a wide range of medical and technological applications.


    Organizational Affiliation

    Centre for Structural Systems Biology (CSSB), and European Molecular Biology Laboratory (EMBL), 22607, Hamburg, Germany. mlandau@technion.ac.il.



Macromolecules
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Cathelicidin antimicrobial peptideA, B13Homo sapiensMutation(s): 0 
Gene Names: CAMPCAP18FALL39HSD26
UniProt & NIH Common Fund Data Resources
Find proteins for P49913 (Homo sapiens)
Explore P49913 
Go to UniProtKB:  P49913
PHAROS:  P49913
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.35 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.232 
  • R-Value Observed: 0.236 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 41.45α = 90
b = 41.45β = 90
c = 57.47γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
XSCALEdata scaling
PHASERphasing
PDB_EXTRACTdata extraction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2020-08-19
    Type: Initial release