1W6O

X-RAY CRYSTAL STRUCTURE OF C2S HUMAN GALECTIN-1 COMPLEXED WITH LACTOSE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.202 

wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history


Literature

Growth-Regulatory Human Galectin-1: Crystallographic Characterisation of the Structural Changes Induced by Single-Site Mutations and Their Impact on the Thermodynamics of Ligand Binding

Lopez-Lucendo, M.I.F.Solis, D.Andre, S.Hirabayashi, J.Kasai, K.Kaltner, H.Gabius, H.J.Romero, A.

(2004) J Mol Biol 343: 957

  • DOI: 10.1016/j.jmb.2004.08.078
  • Primary Citation of Related Structures:  
    1GZW, 1W6O, 1W6N, 1W6M, 1W6Q, 1W6P

  • PubMed Abstract: 
  • Human galectin-1 is a potent multifunctional effector that participates in specific protein-carbohydrate and protein-protein (lipid) interactions. By determining its X-ray structure, we provide the basis to define the structure of its ligand-binding pocket and to perform rational drug design ...

    Human galectin-1 is a potent multifunctional effector that participates in specific protein-carbohydrate and protein-protein (lipid) interactions. By determining its X-ray structure, we provide the basis to define the structure of its ligand-binding pocket and to perform rational drug design. We have also analysed whether single-site mutations introduced at some distance from the carbohydrate recognition domain can affect the lectin fold and influence sugar binding. Both the substitutions introduced in the C2S and R111H mutants altered the presentation of the loop, harbouring Asp123 in the common "jelly-roll" fold. The orientation of the side-chain was inverted 180 degrees and the positions of two key residues in the sugar-binding site of the R111H mutant were notably shifted, i.e. His52 and Trp68. Titration calorimetry was used to define the decrease in ligand affinity in both mutants and a significant increase in the entropic penalty was found to outweigh a slight enhancement of the enthalpic contribution. The position of the SH-groups in the galectin appeared to considerably restrict the potential to form intramolecular disulphide bridges and was assumed to be the reason for the unstable lectin activity in the absence of reducing agent. However, this offers no obvious explanation for the improved stability of the C2S mutant under oxidative conditions. The noted long-range effects in single-site mutants are relevant for the functional divergence of closely related galectins and in more general terms, the functionality definition of distinct amino acids.


    Organizational Affiliation

    Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, E-28040 Madrid, Spain.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
GALECTIN-1 A134Homo sapiensMutation(s): 2 
Gene Names: LGALS1
Find proteins for P09382 (Homo sapiens)
Explore P09382 
Go to UniProtKB:  P09382
NIH Common Fund Data Resources
PHAROS:  P09382
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
GALECTIN-1 B134Homo sapiensMutation(s): 2 
Gene Names: LGALS1
Find proteins for P09382 (Homo sapiens)
Explore P09382 
Go to UniProtKB:  P09382
NIH Common Fund Data Resources
PHAROS:  P09382
Protein Feature View
Expand
  • Reference Sequence
Oligosaccharides

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Entity ID: 3
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
beta-D-galactopyranose-(1-4)-beta-D-glucopyranose
C, D
2 N/A Oligosaccharides Interaction
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CSO
Query on CSO
AL-PEPTIDE LINKINGC3 H7 N O3 SCYS
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
LATIC50:  800000   nM  BindingDB
LATKd:  420000   nM  BindingDB
LATKa:  2200   M^-1  Binding MOAD
Biologically Interesting Molecules (External Reference) 1 Unique
Entity ID: 3
IDChainsNameType/Class2D Diagram3D Interactions
PRD_900004
Query on PRD_900004
C, Dbeta-lactoseOligosaccharide /  Nutrient

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.202 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 36.712α = 90
b = 88.199β = 90
c = 93.683γ = 90
Software Package:
Software NamePurpose
CNSrefinement
MOSFLMdata reduction
SCALAdata scaling
AMoREphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-10-20
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-05-08
    Changes: Data collection, Derived calculations, Experimental preparation, Other
  • Version 1.4: 2019-07-24
    Changes: Data collection
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Non-polymer description, Other, Structure summary