4HL0

Crystal structure of full-length Toxascaris leonina galectin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.293 
  • R-Value Work: 0.254 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure of full-length Toxascaris leonina galectin with two carbohydrate-recognition domains.

Jeong, M.S.Hwang, H.G.Yu, H.S.Jang, S.B.

(2013) Acta Crystallogr.,Sect.D 69: 168-175

  • DOI: 10.1107/S0907444912045106
  • Also Cited By: 5GLT, 5GLV, 5GLU, 5GLW, 5GLZ, 5GM0

  • PubMed Abstract: 
  • The full-length crystal structure of Toxascaris leonine galectin (Tl-gal), a galectin-9 homologue protein, was determined at a resolution of 2.0 Å. Galectin-9 exhibits a variety of biological functions, including cell aggregation, eosinophil chemoatt ...

    The full-length crystal structure of Toxascaris leonine galectin (Tl-gal), a galectin-9 homologue protein, was determined at a resolution of 2.0 Å. Galectin-9 exhibits a variety of biological functions, including cell aggregation, eosinophil chemoattraction, activation and apoptosis of murine thymocytes, T cells and human melanoma cells. Similar to this galectin, Tl-gal may function as a regulatory molecule in the host immune system; however, no molecular or structural information has been reported for Tl-gal. Moreover, until now, there have been no reports of a full-length galectin structure. There are two molecules of Tl-gal per asymmetric unit in space group P2(1)2(1)2(1), and the N-terminal and C-terminal carbohydrate-recognition domains (NCRD and CCRD) of Tl-gal are composed of six-stranded β-sheets and five-stranded β-sheets with a short α-helix. The NCRD of Tl-gal resembles that of human galectin-7 and its CCRD resembles human galectin-9, but the residues in the interface and loop regions of the NCRD and CCRD are flexible and are related to interaction. Engagement of the T-cell immunoglobulin mucin-3 (Tim-3) immunoglobulin variable (IgV) domain by a galectin-9 ligand is known to be important for appropriate termination of T-helper 1 immune responses. To investigate the binding site of Tl-gal, the interaction between Tl-gal and Tim-3 was modelled. Tim-3 is docked into a major groove of the Tl-gal structure, which is larger and deeper than the minor groove. The structural information presented here will provide insight into the development of novel anti-inflammatory agents or selective modulators of immune response.


    Related Citations: 
    • X-ray structures of human galectin-9 C-terminal domain in complexes with a biantennary oligosaccharide and sialyllactose.
      Yoshida, H.,Teraoka, M.,Nishi, N.,Nakakita, S.,Nakamura, T.,Hirashima, M.,Kamitori, S.
      (2010) J.Biol.Chem. 285: 36969


    Organizational Affiliation

    Department of Molecular Biology, College of Natural Sciences, Pusan National University, Jangjeon-dong, Geumjeong-gu, Busan 609-735, Republic of Korea.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
galectin
A, B
278Ascaris suumN/A
Find proteins for F1KZZ8 (Ascaris suum)
Go to UniProtKB:  F1KZZ8
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.293 
  • R-Value Work: 0.254 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 78.573α = 90.00
b = 82.827β = 90.00
c = 122.987γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data collection
HKL-2000data reduction
CNSrefinement
HKL-2000data scaling
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2012-10-15 
  • Released Date: 2013-02-06 
  • Deposition Author(s): Jeong, M.S.

Revision History 

  • Version 1.0: 2013-02-06
    Type: Initial release
  • Version 1.1: 2013-10-30
    Type: Database references