1O82

X-RAY STRUCTURE OF BACTERIOCIN AS-48 AT PH 4.5. SULPHATE BOUND FORM


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.46 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.209 

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This is version 1.2 of the entry. See complete history


Literature

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: 10.1016/j.jmb.2003.09.060
  • Primary Citation of Related Structures:  
    1O84, 1O83, 1O82

  • 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 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.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PEPTIDE ANTIBIOTIC AS-48ABCD70Enterococcus faecalisMutation(s): 0 
Gene Names: as-48as48AbacA
Find proteins for Q47765 (Enterococcus faecalis)
Explore Q47765 
Go to UniProtKB:  Q47765
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.46 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.209 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 79.473α = 90
b = 83.405β = 90
c = 99.828γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
SHELXphasing
SHARPphasing
CCP4phasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • 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