Crystal structure of the C-terminal domain of human galectin-4 with lactose

Experimental Data Snapshot

  • Resolution: 1.78 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.185 

Starting Model: experimental
View more details

wwPDB Validation   3D Report Full Report

This is version 2.2 of the entry. See complete history


Recombinant expression, purification and preliminary biophysical and structural studies of C-terminal carbohydrate recognition domain from human galectin-4.

Rustiguel, J.K.Kumagai, P.S.Dias-Baruffi, M.Costa-Filho, A.J.Nonato, M.C.

(2015) Protein Expr Purif 118: 39-48

  • DOI: https://doi.org/10.1016/j.pep.2015.09.026
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Galectin-4 (Gal4), a tandem-repeat type galectin, is expressed in healthy epithelium of the gastrointestinal tract. Altered levels of Gal4 expression are associated with different types of cancer, suggesting its usage as a diagnostic marker as well as target for drug development. The functional data available for this class of proteins suggest that the wide spectrum of cellular activities reported for Gal4 relies on distinct glycan specificity and structural characteristics of its two carbohydrate recognition domains. In the present work, two independent constructs for recombinant expression of the C-terminal domain of human galectin-4 (hGal4-CRD2) were developed. His6-tagged and untagged recombinant proteins were overexpressed in Escherichia coli, and purified by affinity chromatography followed by gel filtration. Correct folding and activity of hGal4-CRD2 were assessed by circular dichroism and fluorescence spectroscopies, respectively. Diffraction quality crystals were obtained by vapor-diffusion sitting drop setup and the crystal structure of CRD2 was solved by molecular replacement techniques at 1.78 Å resolution. Our work describes the development of important experimental tools that will allow further studies in order to correlate structure and binding properties of hGal4-CRD2 and human galectin-4 functional activities.

  • Organizational Affiliation

    Laboratório de Cristalografia de Proteínas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av. Café, s/n, 14040-903 Ribeirão Preto-SP, Brazil.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C, D
148Homo sapiensMutation(s): 0 
Gene Names: LGALS4
UniProt & NIH Common Fund Data Resources
Find proteins for P56470 (Homo sapiens)
Explore P56470 
Go to UniProtKB:  P56470
GTEx:  ENSG00000171747 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP56470
Sequence Annotations
  • Reference Sequence


Entity ID: 2
MoleculeChains Length2D Diagram Glycosylation3D Interactions
E, F, G, H
Glycosylation Resources
GlyTouCan:  G84224TW
GlyCosmos:  G84224TW
GlyGen:  G84224TW
Experimental Data & Validation

Experimental Data

  • Resolution: 1.78 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.185 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 45.512α = 90
b = 126.741β = 99.65
c = 45.53γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Sao Paulo Research Foundation (FAPESP)Brazil2011/21811-1 and 2010/16153-2

Revision History  (Full details and data files)

  • Version 1.0: 2015-11-04
    Type: Initial release
  • Version 1.1: 2015-11-11
    Changes: Data collection, Database references
  • Version 1.2: 2019-04-17
    Changes: Author supporting evidence, Data collection, Derived calculations
  • Version 1.3: 2020-01-01
    Changes: Author supporting evidence
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Non-polymer description, Structure summary
  • Version 2.1: 2023-09-27
    Changes: Data collection, Database references, Refinement description, Structure summary
  • Version 2.2: 2024-05-01
    Changes: Derived calculations