5FSB

Structure of tectonin 2 from laccaria bicolor in complex with 2-o-methyl-methyl-seleno-beta-l-fucopyranoside


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.167 
  • R-Value Work: 0.133 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal Structures of Fungal Tectonin in Complex with O-Methylated Glycans Suggest Key Role in Innate Immune Defense.

Sommer, R.Makshakova, O.N.Wohlschlager, T.Hutin, S.Marsh, M.Titz, A.Kunzler, M.Varrot, A.

(2018) Structure 26: 391-402.e4

  • DOI: 10.1016/j.str.2018.01.003
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Innate immunity is the first line of defense against pathogens and predators. To initiate a response, it relies on the detection of invaders, where lectin-carbohydrate interactions play a major role. O-Methylated glycans were previously identified as ...

    Innate immunity is the first line of defense against pathogens and predators. To initiate a response, it relies on the detection of invaders, where lectin-carbohydrate interactions play a major role. O-Methylated glycans were previously identified as non-self epitopes and conserved targets for defense effector proteins belonging to the tectonin superfamily. Here, we present two crystal structures of Tectonin 2 from the mushroom Laccaria bicolor in complex with methylated ligands, unraveling the molecular basis for this original specificity. Furthermore, they revealed the formation of a ball-shaped tetramer with 24 binding sites distributed at its surface, resembling a small virus capsid. Based on the crystal structures, a methylation recognition motif was identified and found in the sequence of many tectonins from bacteria to human. Our results support a key role of tectonins in innate defense based on a distinctive and conserved type of lectin-glycan interaction.


    Organizational Affiliation

    Univ. Grenoble Alpes, CEA, CNRS, Institut de Biologie Structurale, 38000 Grenoble, France.,Chemical Biology of Carbohydrates, Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), 66123 Saarbrücken, Germany; Deutsches Zentrum für Infektionsforschung, Standort Hannover-Braunschweig, Hannover, Germany.,Univ. Grenoble Alpes, CNRS, CERMAV, 38000 Grenoble, France.,Univ. Grenoble Alpes, CNRS, CERMAV, 38000 Grenoble, France. Electronic address: annabelle.varrot@cermav.cnrs.fr.,Macromolecular Crystallography, Swiss Light Source, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland.,Institute of Microbiology, Department of Biology, Swiss Federal Institute of Technology (ETH), 8093 Zürich, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TECTONIN 2
A, B
227Laccaria bicolor (strain S238N-H82 / ATCC MYA-4686)Mutation(s): 0 
Find proteins for B0CZL6 (Laccaria bicolor (strain S238N-H82 / ATCC MYA-4686))
Go to UniProtKB:  B0CZL6
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
6YR
Query on 6YR

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Download CCD File 
A, B
2-O-methyl-methyl-seleno-L-fucopyranoside
C8 H16 O4 Se
JGCHFCAEXBTPJU-FMGWEMOISA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A, B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
BO3
Query on BO3

Download SDF File 
Download CCD File 
A
BORIC ACID
B H3 O3
KGBXLFKZBHKPEV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.167 
  • R-Value Work: 0.133 
  • Space Group: H 3 2
Unit Cell:
Length (Å)Angle (°)
a = 69.058α = 90.00
b = 69.058β = 90.00
c = 349.211γ = 120.00
Software Package:
Software NamePurpose
SHELXphasing
XDSdata reduction
Aimlessdata scaling
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-03-29
    Type: Initial release
  • Version 1.1: 2018-02-14
    Type: Database references
  • Version 1.2: 2018-03-14
    Type: Database references