CGL2 in complex with lactose

Experimental Data Snapshot

  • Resolution: 2.60 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.210 

wwPDB Validation   3D Report Full Report

This is version 2.1 of the entry. See complete history


Structure and Functional Analysis of the Fungal Galectin CGL2

Walser, P.J.Haebel, P.W.Kuenzler, M.Sargent, D.Kues, U.Aebi, M.Ban, N.

(2004) Structure 12: 689-702

  • DOI: https://doi.org/10.1016/j.str.2004.03.002
  • Primary Citation of Related Structures:  
    1UL9, 1ULC, 1ULD, 1ULE, 1ULF, 1ULG

  • PubMed Abstract: 

    Recognition of and discrimination between potential glyco-substrates is central to the function of galectins. Here we dissect the fundamental parameters responsible for such selectivity by the fungal representative, CGL2. The 2.1 A crystal structure of CGL2 and five substrate complexes reveal that this prototype galectin achieves increased substrate specificity by accommodating substituted oligosaccharides of the mammalian blood group A/B type in an extended binding cleft. Kinetic studies on wild-type and mutant CGL2 proteins demonstrate that the tetrameric organization is essential for functionality. The geometric constraints due to the orthogonal orientation of the four binding sites have important consequences on substrate binding and selectivity.

  • Organizational Affiliation

    Institute of Microbiology, Swiss Federal Institute of Technology, Schmelzbergstrasse 7, CH-8092, Zurich, Switzerland.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
150Coprinopsis cinereaMutation(s): 0 
Gene Names: cgl2
Find proteins for Q9P4R8 (Coprinopsis cinerea)
Explore Q9P4R8 
Go to UniProtKB:  Q9P4R8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9P4R8
Sequence Annotations
  • Reference Sequence


Entity ID: 2
MoleculeChains Length2D Diagram Glycosylation3D Interactions
C, D
Glycosylation Resources
GlyTouCan:  G84224TW
GlyCosmos:  G84224TW
GlyGen:  G84224TW
Biologically Interesting Molecules (External Reference) 1 Unique
Experimental Data & Validation

Experimental Data

  • Resolution: 2.60 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.210 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 65.22α = 90
b = 65.22β = 90
c = 240.286γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-04-20
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Structure summary
  • Version 2.1: 2023-12-27
    Changes: Data collection, Database references, Structure summary