4AGI

Crystal Structure of Fucose binding lectin from Aspergillus Fumigatus (AFL) in complex with seleno fucoside.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.185 
  • R-Value Work: 0.152 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

A Soluble Fucose-Specific Lectin from Aspergillus Fumigatus Conidia - Structure, Specificity and Possible Role in Fungal Pathogenicity.

Houser, J.Komarek, J.Kostlanova, N.Cioci, G.Varrot, A.Kerr, S.C.Lahmann, M.Balloy, V.Fahy, J.V.Chignard, M.Imberty, A.Wimmerova, M.

(2013) Plos One 8: 83077

  • DOI: 10.1371/journal.pone.0083077

  • PubMed Abstract: 
  • Aspergillus fumigatus is an important allergen and opportunistic pathogen. Similarly to many other pathogens, it is able to produce lectins that may be involved in the host-pathogen interaction. We focused on the lectin AFL, which was prepared in rec ...

    Aspergillus fumigatus is an important allergen and opportunistic pathogen. Similarly to many other pathogens, it is able to produce lectins that may be involved in the host-pathogen interaction. We focused on the lectin AFL, which was prepared in recombinant form and characterized. Its binding properties were studied using hemagglutination and glycan array analysis. We determined the specificity of the lectin towards l-fucose and fucosylated oligosaccharides, including α1-6 linked core-fucose, which is an important marker for cancerogenesis. Other biologically relevant saccharides such as sialic acid, d-mannose or d-galactose were not bound. Blood group epitopes of the ABH and Lewis systems were recognized, Le(Y) being the preferred ligand among others. To provide a correlation between the observed functional characteristics and structural basis, AFL was crystallized in a complex with methyl-α,L-selenofucoside and its structure was solved using the SAD method. Six binding sites, each with different compositions, were identified per monomer and significant differences from the homologous AAL lectin were found. Structure-derived peptides were utilized to prepare anti-AFL polyclonal antibodies, which suggested the presence of AFL on the Aspergillus' conidia, confirming its expression in vivo. Stimulation of human bronchial cells by AFL led to IL-8 production in a dose-dependent manner. AFL thus probably contributes to the inflammatory response observed upon the exposure of a patient to A. fumigatus. The combination of affinity to human epithelial epitopes, production by conidia and pro-inflammatory activity is remarkable and shows that AFL might be an important virulence factor involved in an early stage of A. fumigatus infection.


    Organizational Affiliation

    Central European Institute for Technology, Masaryk University, Brno, Czech Republic ; National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Brno, Czech Republic.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
FUCOSE-SPECIFIC LECTIN FLEA
A, B, C, D
315Neosartorya fumigata (strain ATCC MYA-4609 / Af293 / CBS 101355 / FGSC A1100)N/A
Find proteins for Q4WW81 (Neosartorya fumigata (strain ATCC MYA-4609 / Af293 / CBS 101355 / FGSC A1100))
Go to UniProtKB:  Q4WW81
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SFU
Query on SFU

Download SDF File 
Download CCD File 
A, B, C, D
METHYL 6-DEOXY-1-SELENO-ALPHA-L-GALACTOPYRANOSIDE
METHYL 1-SELENO-ALPHA-L-FUCOPYRANOSIDE
C7 H14 O4 Se
VHTNTJQSKJZERS-XUVCUMPTSA-N
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
CSK
Query on CSK
A, B, C, D
L-PEPTIDE LINKINGC4 H9 N O2 S Se

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CSD
Query on CSD
A, B, C, D
L-PEPTIDE LINKINGC3 H7 N O4 SCYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.185 
  • R-Value Work: 0.152 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 46.691α = 91.09
b = 79.847β = 88.89
c = 84.389γ = 103.00
Software Package:
Software NamePurpose
XDSdata reduction
HKL2MAPphasing
REFMACrefinement
XDSdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-02-06
    Type: Initial release
  • Version 1.1: 2014-01-08
    Type: Database references
  • Version 1.2: 2014-11-05
    Type: Atomic model, Database references, Derived calculations, Non-polymer description, Other, Refinement description, Structure summary