Crystal Structure of Bacteriocin AS-48 at pH 7.5, phosphate bound. Crystal form I

Experimental Data Snapshot

  • Resolution: 1.64 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.195 

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Structure of Bacteriocin as-48: From Soluble State to Membrane Bound State

Sanchez-Barrena, M.J.Martinez-Ripoll, M.Galvez, A.Valdivia, E.Maqueda, M.Cruz, V.Albert, A.

(2003) J Mol Biol 334: 541

  • DOI: https://doi.org/10.1016/j.jmb.2003.09.060
  • Primary Citation of Related Structures:  
    1O82, 1O83

  • PubMed Abstract: 

    The bacteriocin AS-48 is a membrane-interacting peptide, which displays a broad anti-microbial spectrum against Gram-positive and Gram-negative bacteria. The NMR structure of AS-48 at pH 3 has been solved. The analysis of this structure suggests that the mechanism of AS-48 anti-bacterial activity involves the accumulation of positively charged molecules at the membrane surface leading to a disruption of the membrane potential. Here, we report the high-resolution crystal structure of AS-48 and sedimentation equilibrium experiments showing that this bacteriocin is able to adopt different oligomeric structures according to the physicochemical environment. The analysis of these structures suggests a mechanism for molecular function of AS-48 involving a transition from a water-soluble form to a membrane-bound state upon membrane binding.

  • Organizational Affiliation

    Grupo de Cristalografía Macromolecular y Biología Estructural, Instituto de Química Física Rocasolano, Consejo Superior de Investigaciones Científicas, Serrano 119, E-28006, Madrid, Spain.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C, D
70Enterococcus faecalisMutation(s): 0 
Find proteins for Q47765 (Enterococcus faecalis)
Explore Q47765 
Go to UniProtKB:  Q47765
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ47765
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.64 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.195 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 79.67α = 90
b = 83.88β = 90
c = 99.77γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-11-20
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-10-16
    Changes: Data collection, Experimental preparation, Other