1W3A

Three dimensional structure of a novel pore-forming lectin from the mushroom Laetiporus sulphureus


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.65 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.226 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Analysis of the Laetiporus Sulphureus Hemolytic Pore-Forming Lectin in Complex with Sugars

Mancheno, J.M.Tateno, H.Goldstein, I.J.Martinez-Ripoll, M.Hermoso, J.A.

(2005) J.Biol.Chem. 280: 17251

  • DOI: 10.1074/jbc.M413933200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • LSL is a lectin produced by the parasitic mushroom Laetiporus sulphureus, which exhibits hemolytic and hemagglutinating activities. Here, we report the crystal structure of LSL refined to 2.6-A resolution determined by the single isomorphous replacem ...

    LSL is a lectin produced by the parasitic mushroom Laetiporus sulphureus, which exhibits hemolytic and hemagglutinating activities. Here, we report the crystal structure of LSL refined to 2.6-A resolution determined by the single isomorphous replacement method with the anomalous scatter (SIRAS) signal of a platinum derivative. The structure reveals that LSL is hexameric, which was also shown by analytical ultracentrifugation. The monomeric protein (35 kDa) consists of two distinct modules: an N-terminal lectin module and a pore-forming module. The lectin module has a beta-trefoil scaffold that bears structural similarities to those present in toxins known to interact with galactose-related carbohydrates such as the hemagglutinin component (HA1) of the progenitor toxin from Clostridium botulinum, abrin, and ricin. On the other hand, the C-terminal pore-forming module (composed of domains 2 and 3) exhibits three-dimensional structural resemblances with domains 3 and 4 of the beta-pore-forming toxin aerolysin from the Gram-negative bacterium Aeromonas hydrophila, and domains 2 and 3 from the epsilon-toxin from Clostridium perfringens. This finding reveals the existence of common structural elements within the aerolysin-like family of toxins that could be directly involved in membrane-pore formation. The crystal structures of the complexes of LSL with lactose and N-acetyllactosamine reveal two dissacharide-binding sites per subunit and permits the identification of critical residues involved in sugar binding.


    Organizational Affiliation

    Grupo de CristalografĂ­a Macromolecular y BiologĂ­a Estructural, Instituto Rocasolano, CSIC, Serrano, 119, 28006 Madrid, Spain. xjosemi@iqfr.csic.es




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HEMOLYTIC LECTIN LSLA
A
315Laetiporus sulphureusMutation(s): 0 
Gene Names: lsla
Find proteins for Q7Z8V1 (Laetiporus sulphureus)
Go to UniProtKB:  Q7Z8V1
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download SDF File 
Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
LBT
Query on LBT

Download SDF File 
Download CCD File 
A
ALPHA-LACTOSE
C12 H22 O11
GUBGYTABKSRVRQ-XLOQQCSPSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.65 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.226 
  • Space Group: P 63 2 2
Unit Cell:
Length (Å)Angle (°)
a = 101.526α = 90.00
b = 101.526β = 90.00
c = 193.435γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
SOLVEphasing
MLPHAREphasing
SHARPphasing
MOSFLMdata reduction
SCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-02-01
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance