2LRE

The solution structure of the dimeric Acanthaporin


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 400 
  • Conformers Submitted: 17 
  • Selection Criteria: target function 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure and function of a unique pore-forming protein from a pathogenic acanthamoeba.

Michalek, M.Sonnichsen, F.D.Wechselberger, R.Dingley, A.J.Hung, C.W.Kopp, A.Wienk, H.Simanski, M.Herbst, R.Lorenzen, I.Marciano-Cabral, F.Gelhaus, C.Gutsmann, T.Tholey, A.Grotzinger, J.Leippe, M.

(2013) Nat.Chem.Biol. 9: 37-42

  • DOI: 10.1038/nchembio.1116
  • Primary Citation of Related Structures:  2LRD

  • PubMed Abstract: 
  • Human pathogens often produce soluble protein toxins that generate pores inside membranes, resulting in the death of target cells and tissue damage. In pathogenic amoebae, this has been exemplified with amoebapores of the enteric protozoan parasite E ...

    Human pathogens often produce soluble protein toxins that generate pores inside membranes, resulting in the death of target cells and tissue damage. In pathogenic amoebae, this has been exemplified with amoebapores of the enteric protozoan parasite Entamoeba histolytica. Here we characterize acanthaporin, to our knowledge the first pore-forming toxin to be described from acanthamoebae, which are free-living, bacteria-feeding, unicellular organisms that are opportunistic pathogens of increasing importance and cause severe and often fatal diseases. We isolated acanthaporin from extracts of virulent Acanthamoeba culbertsoni by tracking its pore-forming activity, molecularly cloned the gene of its precursor and recombinantly expressed the mature protein in bacteria. Acanthaporin was cytotoxic for human neuronal cells and exerted antimicrobial activity against a variety of bacterial strains by permeabilizing their membranes. The tertiary structures of acanthaporin's active monomeric form and inactive dimeric form, both solved by NMR spectroscopy, revealed a currently unknown protein fold and a pH-dependent trigger mechanism of activation.


    Organizational Affiliation

    Zoological Institute, Zoophysiology, Christian-Albrechts Universit├Ąt zu Kiel, Kiel, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Acanthaporin
A, B
61Acanthamoeba culbertsoniN/A
Find proteins for I3NI56 (Acanthamoeba culbertsoni)
Go to UniProtKB:  I3NI56
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 400 
  • Conformers Submitted: 17 
  • Selection Criteria: target function 
  • Olderado: 2LRE Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-05-02
    Type: Initial release
  • Version 1.1: 2012-11-14
    Type: Database references
  • Version 1.2: 2012-12-26
    Type: Database references