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 
  • R-Value Observed: 0.229 

wwPDB Validation   3D Report Full Report


This is version 2.0 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:  
    1W3A, 1W3F, 1W3G

  • 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 replacement method with the anomalous scatter (SIRAS) signal of a platinum derivative ...

    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 Cristalografía Macromolecular y Biología Estructural, Instituto Rocasolano, CSIC, Serrano, 119, 28006 Madrid, Spain. xjosemi@iqfr.csic.es



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HEMOLYTIC LECTIN LSLAA315Laetiporus sulphureusMutation(s): 0 
Gene Names: lsla
UniProt
Find proteins for Q7Z8V1 (Laetiporus sulphureus)
Explore Q7Z8V1 
Go to UniProtKB:  Q7Z8V1
Protein Feature View
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  • Reference Sequence
Oligosaccharides

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Entity ID: 2
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
beta-D-galactopyranose-(1-4)-alpha-D-glucopyranoseB2N/A Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G88362QR
GlyCosmos:  G88362QR
GlyGen:  G88362QR
Biologically Interesting Molecules (External Reference) 1 Unique
Entity ID: 2
IDChainsNameType/Class2D Diagram3D Interactions
PRD_900008
Query on PRD_900008
Balpha-lactoseOligosaccharide /  Nutrient 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 
  • R-Value Observed: 0.229 
  • Space Group: P 63 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 101.526α = 90
b = 101.526β = 90
c = 193.435γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALEdata scaling
SOLVEphasing
MLPHAREphasing
SHARPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-02-01
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Non-polymer description, Other, Structure summary