3EF2

Structure of the Marasmius oreades mushroom lectin (MOA) in complex with Galalpha(1,3)[Fucalpha(1,2)]Gal and Calcium.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.165 
  • R-Value Observed: 0.166 

wwPDB Validation 3D Report Full Report



Literature

Structural Characterization of a Lectin from the Mushroom Marasmius oreades in Complex with the Blood Group B Trisaccharide and Calcium.

Grahn, E.M.Winter, H.C.Tateno, H.Goldstein, I.J.Krengel, U.

(2009) J Mol Biol 390: 457-466

  • DOI: 10.1016/j.jmb.2009.04.074
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • MOA (Marasmius oreades agglutinin), a lectin isolated from fruiting bodies of the mushroom M. oreades, specifically binds nonreducing terminal Galalpha(1,3)Gal carbohydrates, such as that which occurs in the xenotransplantation epitope Galalpha(1,3)G ...

    MOA (Marasmius oreades agglutinin), a lectin isolated from fruiting bodies of the mushroom M. oreades, specifically binds nonreducing terminal Galalpha(1,3)Gal carbohydrates, such as that which occurs in the xenotransplantation epitope Galalpha(1,3)Galbeta(1,4)GlcNAc and the branched blood group B determinant Galalpha(1,3)[Fucalpha(1,2)]Gal. Here, we present the crystal structure of MOA in complex with the blood group B trisaccharide solved at 1.8 A resolution. To our knowledge, this is the first blood-group-B-specific structure reported in complex with a blood group B determinant. The carbohydrate ligand binds to all three binding sites of the N-terminal beta-trefoil domain. Also, in this work, Ca(2+) was included in the crystals, and binding of Ca(2+) to the MOA homodimer altered the conformation of the C-terminal domain by opening up the cleft containing a putative catalytic site.


    Organizational Affiliation

    Department of Chemistry, University of Oslo, Norway. elin.grahn@oru.se



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
AgglutininA, B, C, D293Marasmius oreadesMutation(s): 0 
Find proteins for Q8X123 (Marasmius oreades)
Explore Q8X123 
Go to UniProtKB:  Q8X123
Protein Feature View
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  • Reference Sequence
Oligosaccharides
Entity ID: 2
MoleculeChainsChain Length2D Diagram Glycosylation
alpha-L-fucopyranose-(1-2)-[alpha-D-galactopyranose-(1-3)]beta-D-galactopyranose
A, B, C, D
3 N/A
Entity ID: 3
MoleculeChainsChain Length2D Diagram Glycosylation
alpha-L-fucopyranose-(1-2)-[alpha-D-galactopyranose-(1-3)]alpha-D-galactopyranose
A, B, C, D
3 N/A
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ACT
Query on ACT

Download CCD File 
A, C, D
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
CA
Query on CA

Download CCD File 
A, B, C, D
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
OCS
Query on OCS
A,B,C,DL-PEPTIDE LINKINGC3 H7 N O5 SCYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.165 
  • R-Value Observed: 0.166 
  • Space Group: P 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 121.279α = 90
b = 121.279β = 90
c = 100.124γ = 120
Software Package:
Software NamePurpose
MxCuBEdata collection
MOLREPphasing
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-06-30
    Type: Initial release
  • Version 1.1: 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, Structure summary