4OZK

Crystal structure of Laterosporulin, a broad spectrum leaderless bacteriocin produced by Brevibacillus laterosporus strain GI-9

  • Classification: TOXIN
  • Organism(s): Brevibacillus sp. GI-9

  • Deposited: 2014-02-17 Released: 2014-11-12 
  • Deposition Author(s): Vipul, S., Thakur, K.G.
  • Funding Organization(s): Council of Scientific and Insdustrial Research, Govt. of India 

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.038 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.196 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

The intramolecular disulfide-stapled structure of laterosporulin, a class IId bacteriocin, conceals a human defensin-like structural module.

Singh, P.K.Solanki, V.Sharma, S.Thakur, K.G.Krishnan, B.Korpole, S.

(2015) Febs J. 282: 203-214

  • DOI: 10.1111/febs.13129

  • PubMed Abstract: 
  • The growing emergence of antibiotic-resistant bacteria has led to the exploration of naturally occurring defense peptides as antimicrobials. In this study, we found that laterosporulin (LS), a class IId bacteriocin, effectively kills active and nonmu ...

    The growing emergence of antibiotic-resistant bacteria has led to the exploration of naturally occurring defense peptides as antimicrobials. In this study, we found that laterosporulin (LS), a class IId bacteriocin, effectively kills active and nonmultiplying cells of both Gram-positive and Gram-negative bacteria. Fluorescence and electron microscopy suggest that growth inhibition occurs because of increased membrane permeability. The crystal structure of LS at 2.0 Å resolution reveals an all-β conformation of this peptide, with four β-strands forming a twisted β-sheet. All six intrinsic cysteines are intramolecularly disulfide-bonded, with two disulfides constraining the N terminus of the peptide and the third disulfide crosslinking the extreme C terminus, resulting in the formation of a closed structure. The significance of disulfides in maintaining the in-solution peptide structure was confirmed by CD and fluorescence analyses. Despite a low overall sequence similarity, LS has disulfide connectivity [C(I)-C(V), C(II)-C(IV), and C(III)-C(VI)] like that of β-defensins and a striking architectural similarity with α-defensins. Therefore LS presents a missing link between bacteriocins and mammalian defensins, and is also a potential antimicrobial lead, in particular against nonmultiplying bacteria.


    Organizational Affiliation

    Microbial Type Culture Collection & Gene Bank, CSIR-Institute of Microbial Technology, Chandigarh, India.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Putative bacteriocin
A
49Brevibacillus sp. GI-9Mutation(s): 0 
Gene Names: laterosporulin
Find proteins for H1ZZ98 (Brevibacillus sp. GI-9)
Go to UniProtKB:  H1ZZ98
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.038 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.196 
  • Space Group: P 43 3 2
Unit Cell:
Length (Å)Angle (°)
a = 65.000α = 90.00
b = 65.000β = 90.00
c = 65.000γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
PDB_EXTRACTdata extraction
PHENIXrefinement
SCALAdata scaling
MOSFLMdata reduction
SHELXDphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Council of Scientific and Insdustrial Research, Govt. of IndiaIndia--

Revision History 

  • Version 1.0: 2014-11-12
    Type: Initial release
  • Version 1.1: 2014-12-03
    Type: Database references
  • Version 1.2: 2015-02-04
    Type: Database references
  • Version 1.3: 2017-11-22
    Type: Advisory, Derived calculations, Other, Refinement description, Source and taxonomy