3T2T

Crystal structure of human galectin-1 in complex with methyl 2-O-acetyl-3-O-toluoyl-beta-D-talopyranoside


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.188 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Taloside inhibitors of galectin-1 and galectin-3

Collins, P.M.Oberg, C.T.Leffler, H.Nilsson, U.J.Blanchard, H.

(2012) Chem.Biol.Drug Des. 79: 339-346

  • DOI: 10.1111/j.1747-0285.2011.01283.x
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Galectin-1 and galectin-3 have roles in cancer and inflammation. Galectin-1 has recently emerged as a significant protein produced by tumour cells to promote tumour development, angiogenesis and metastasis and consequently represents an important tar ...

    Galectin-1 and galectin-3 have roles in cancer and inflammation. Galectin-1 has recently emerged as a significant protein produced by tumour cells to promote tumour development, angiogenesis and metastasis and consequently represents an important target to inhibit. The design of inhibitors targeting the carbohydrate recognition domain that is known to recognize galactose is an important approach in the fight against cancer. Based on the analysis of crystal structures, we pursued the concept that if the galactose was replaced with talose (the C2 epimer of galactose) as a scaffold, then O2 substituents would be directed closer to the protein surface and provide opportunity to design inhibitors that are more specific towards particular galectins. Our elucidation of X-ray crystal structures of two of our synthesized talosides in complex with galectin-1 and galectin-3 provides the first atomic information on the interactions of galectins, and indeed any protein, with talosides. These results have enabled a structure-based rationale for the specificity differences shown by galectin-1 and galectin-3 towards these talosides and demonstrate new opportunities for further exploitation as specific inhibitors of galectins.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Galectin-1
A, B
135Homo sapiensMutation(s): 0 
Gene Names: LGALS1
Find proteins for P09382 (Homo sapiens)
Go to Gene View: LGALS1
Go to UniProtKB:  P09382
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MQT
Query on MQT

Download SDF File 
Download CCD File 
A
methyl 2-O-acetyl-3-O-(4-methylbenzoyl)-beta-D-talopyranoside
methyl 2-O-acetyl-3-O-4-toluoyl-beta-D-talopyranoside
C17 H22 O8
IYJMKTZAMJWCQH-JLHDYFKBSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CME
Query on CME
A, B
L-PEPTIDE LINKINGC5 H11 N O3 S2CYS
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
MQTKd: >4000000 nM (100) BINDINGDB
MQTKd: >4000000 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.188 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 44.687α = 90.00
b = 58.444β = 90.00
c = 112.280γ = 90.00
Software Package:
Software NamePurpose
PROTEUM PLUSdata collection
AMoREphasing
REFMACrefinement
SCALAdata scaling
SAINTdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-12-28
    Type: Initial release
  • Version 1.1: 2013-07-03
    Type: Database references