2K35

Hydramacin-1: Structure and antibacterial activity of a peptide from the basal metazoan Hydra


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 500 
  • Conformers Submitted: 25 
  • Selection Criteria: target function 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Hydramacin-1, structure and antibacterial activity of a protein from the Basal metazoan hydra.

Jung, S.Dingley, A.J.Augustin, R.Anton-Erxleben, F.Stanisak, M.Gelhaus, C.Gutsmann, T.Hammer, M.U.Podschun, R.Bonvin, A.M.Leippe, M.Bosch, T.C.Grotzinger, J.

(2009) J.Biol.Chem. 284: 1896-1905

  • DOI: 10.1074/jbc.M804713200

  • PubMed Abstract: 
  • Hydramacin-1 is a novel antimicrobial protein recently discovered during investigations of the epithelial defense of the ancient metazoan Hydra. The amino acid sequence of hydramacin-1 shows no sequence homology to any known antimicrobial proteins. D ...

    Hydramacin-1 is a novel antimicrobial protein recently discovered during investigations of the epithelial defense of the ancient metazoan Hydra. The amino acid sequence of hydramacin-1 shows no sequence homology to any known antimicrobial proteins. Determination of the solution structure revealed that hydramacin-1 possesses a disulfide bridge-stabilized alphabeta motif. This motif is the common scaffold of the knottin protein fold. The structurally closest relatives are the scorpion oxin-like superfamily. Within this superfamily hydramacin-1 establishes a new family of proteins that all share antimicrobial activity. Hydramacin-1 is potently active against Gram-positive and Gram-negative bacteria including multi-resistant human pathogenic strains. It leads to aggregation of bacteria as an initial step of its bactericidal mechanism. Aggregated cells are connected via electron-dense contacts and adopt a thorn apple-like morphology. Analysis of the hydramacin-1 structure revealed an unusual distribution of amino acid side chains on the surface. A belt of positively charged residues is sandwiched by two hydrophobic areas. Based on this characteristic surface feature and on biophysical analysis of protein-membrane interactions, we propose a model that describes the aggregation effect exhibited by hydramacin-1.


    Organizational Affiliation

    Institute of Biochemistry and Institute of Zoology, Zoophysiology, Christian-Albrechts-University of Kiel, Olshausenstrasse 40, 24098 Kiel, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
hydramacin-1
A
60Hydra vulgarisMutation(s): 0 
Find proteins for B3RFR8 (Hydra vulgaris)
Go to UniProtKB:  B3RFR8
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 500 
  • Conformers Submitted: 25 
  • Selection Criteria: target function 
  • Olderado: 2K35 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-11-18
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance