3M3O

Crystal Structure of Agrocybe aegerita lectin AAL mutant R85A complexed with p-Nitrophenyl TF disaccharide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.235 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 2.1 of the entry. See complete history


Literature

Structural insights into the recognition mechanism between an antitumor galectin AAL and the Thomsen-Friedenreich antigen

Feng, L.Sun, H.Zhang, Y.Li, D.F.Wang, D.C.

(2010) FASEB J 24: 3861-3868

  • DOI: https://doi.org/10.1096/fj.10-159111
  • Primary Citation of Related Structures:  
    3AFK, 3M3C, 3M3E, 3M3O, 3M3Q

  • PubMed Abstract: 

    Thomsen-Friedenreich (TF) antigen, which plays an important role in the regulation of cancer cell proliferation, occurs in ∼90% of all human cancers and precancerous conditions. Although TF antigen has been known for almost 80 yr as a pancarcinoma antigen, the recognition mechanism between TF antigen and target protein has not been structurally characterized. A number of studies indicated that TF disaccharide is a potential ligand of the galactoside-binding galectins. In this work, we identified the TF antigen as a potential ligand of the antitumor galectin AAL (Agrocybe aegerita lectin) through glycan array analysis and reported the crystal structure of AAL complexed with the TF antigen. The structure provides a first look at the recognition mode between AAL and TF antigen, which is unique in a conservative (Glu-water-Arg-water) structural motif-based hydrogen bond network. Structure-based mutagenesis analysis further revealed the residues responsible for recognition specificity and binding affinity. Crystal structures of AAL complexed with two other TF-containing glycans showed that the unique TF recognition mode is kept intact, which may be commonly adopted in some cancer-related galectins. The finding provided the new target and approach for the antitumor drug design and relative strategy based on the AAL-TF recognition mode as a prototype model.


  • Organizational Affiliation

    National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Chaoyang District, Beijing 100101, PR China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Anti-tumor lectin158Cyclocybe aegeritaMutation(s): 1 
Gene Names: AAL
EC: 3.1.21
UniProt
Find proteins for Q6WY08 (Cyclocybe aegerita)
Explore Q6WY08 
Go to UniProtKB:  Q6WY08
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ6WY08
Sequence Annotations
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChains Length2D Diagram Glycosylation3D Interactions
beta-D-galactopyranose-(1-3)-2-acetamido-2-deoxy-alpha-D-galactopyranose
B
2N/A
Glycosylation Resources
GlyTouCan:  G00031MO
GlyCosmos:  G00031MO
GlyGen:  G00031MO
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
BTB
Query on BTB

Download Ideal Coordinates CCD File 
D [auth A]2-[BIS-(2-HYDROXY-ETHYL)-AMINO]-2-HYDROXYMETHYL-PROPANE-1,3-DIOL
C8 H19 N O5
OWMVSZAMULFTJU-UHFFFAOYSA-N
NPO
Query on NPO

Download Ideal Coordinates CCD File 
C [auth A]P-NITROPHENOL
C6 H5 N O3
BTJIUGUIPKRLHP-UHFFFAOYSA-N
Biologically Interesting Molecules (External Reference) 1 Unique
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.235 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 42.56α = 90
b = 42.56β = 90
c = 125.3γ = 120
Software Package:
Software NamePurpose
SCALAdata processing
CNSrefinement
PDB_EXTRACTdata extraction
CrystalCleardata collection
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-12-01
    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, Database references, Derived calculations, Structure summary
  • Version 2.1: 2023-11-01
    Changes: Data collection, Database references, Refinement description, Structure summary