2NMN

Crystal structure of human galectin-3 carbohydrate-recognising domain at 2.45 angstrom resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.45 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.163 
  • R-Value Observed: 0.167 

wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history


Literature

Slow diffusion of lactose out of galectin-3 crystals monitored by X-ray crystallography: possible implications for ligand-exchange protocols.

Collins, P.M.Hidari, K.I.Blanchard, H.

(2007) Acta Crystallogr D Biol Crystallogr 63: 415-419

  • DOI: 10.1107/S090744490605270X
  • Primary Citation of Related Structures:  
    2NMO, 2NMN, 2NN8

  • PubMed Abstract: 
  • Galectin-3 is a multifunctional carbohydrate-binding protein that has roles in cancer progression. In addition to carbohydrate-dependent extracellular functions, galectin-3 participates in carbohydrate-independent intracellular signalling pathways, including apoptosis, via protein-protein interactions, some of which engage the carbohydrate-binding groove ...

    Galectin-3 is a multifunctional carbohydrate-binding protein that has roles in cancer progression. In addition to carbohydrate-dependent extracellular functions, galectin-3 participates in carbohydrate-independent intracellular signalling pathways, including apoptosis, via protein-protein interactions, some of which engage the carbohydrate-binding groove. When ligands bind within this site, conformational rearrangements are induced and information on unliganded galectin-3 is therefore valuable for structure-based drug design. Removal of cocrystallized lactose from the human galectin-3 carbohydrate-recognition domain was achieved via crystal soaking, but took weeks despite low affinity. Pre-soaking to remove lactose enabled the subsequent binding of cryoprotectant glycerol, whereas when the lactose was not removed a priori the glycerol could not displace it in the short cryosoaking time frame. This slow diffusion of lactose out of the crystals contrasts with the entrance of glycerol, which takes place within minutes. The importance of the removal of incumbent ligands prior to attempts to introduce alternative ligands is indicated, even for proteins exhibiting low affinity for ligands, and has significance for ligand exchange in structure-based drug design.


    Organizational Affiliation

    The Institute for Glycomics, Griffith University (Gold Coast Campus), PMB 50 Gold Coast Mail Centre, Queensland 9726, Australia.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Galectin-3 A138Homo sapiensMutation(s): 0 
Gene Names: LGALS3MAC2
Find proteins for P17931 (Homo sapiens)
Explore P17931 
Go to UniProtKB:  P17931
NIH Common Fund Data Resources
PHAROS:  P17931
Protein Feature View
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
beta-D-galactopyranose-(1-4)-beta-D-glucopyranose
B
2 N/A Oligosaccharides Interaction
Biologically Interesting Molecules (External Reference) 1 Unique
Entity ID: 2
IDChainsNameType/Class2D Diagram3D Interactions
PRD_900004
Query on PRD_900004
Bbeta-lactoseOligosaccharide /  Nutrient

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.45 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.163 
  • R-Value Observed: 0.167 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 37.341α = 90
b = 58.238β = 90
c = 63.731γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
PROTEUM PLUSdata collection
SAINTdata reduction
LSCALEdata scaling
AMoREphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-03-06
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-18
    Changes: Refinement description
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Structure summary