1FG5

CRYSTAL STRUCTURE OF BOVINE ALPHA-1,3-GALACTOSYLTRANSFERASE CATALYTIC DOMAIN.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.237 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Bovine alpha1,3-galactosyltransferase catalytic domain structure and its relationship with ABO histo-blood group and glycosphingolipid glycosyltransferases.

Gastinel, L.N.Bignon, C.Misra, A.K.Hindsgaul, O.Shaper, J.H.Joziasse, D.H.

(2001) EMBO J. 20: 638-649

  • DOI: 10.1093/emboj/20.4.638
  • Primary Citation of Related Structures:  1G8O, 1G93
  • Also Cited By: 1O7O, 1O7Q, 1VZU, 1VZX, 1VZT

  • PubMed Abstract: 
  • alpha1,3-galactosyltransferase (alpha3GalT, EC 2.4.1.151) is a Golgi-resident, type II transmembrane protein that transfers galactose from UDP-alpha-galactose to the terminal N:-acetyllactosamine unit of glycoconjugate glycans, producing the Galalpha ...

    alpha1,3-galactosyltransferase (alpha3GalT, EC 2.4.1.151) is a Golgi-resident, type II transmembrane protein that transfers galactose from UDP-alpha-galactose to the terminal N:-acetyllactosamine unit of glycoconjugate glycans, producing the Galalpha1,3Galbeta1,4GlcNAc oligosaccharide structure present in most mammalian glycoproteins. Unlike most other mammals, humans and Old World primates do not possess alpha3GalT activity, which is relevant for the hyperacute rejection observed in pig-to-human xenotransplantation. The crystal structure of the catalytic domain of substrate-free bovine alpha3GalT, solved and refined to 2.3 A resolution, has a globular shape with an alpha/beta fold containing a narrow cleft on one face, and shares a UDP-binding domain (UBD) with the recently solved inverting glycosyltransferases. The substrate-bound complex, solved and refined to 2.5 A, allows the description of residues interacting directly with UDP-galactose. These structural data suggest that the strictly conserved residue E317 is likely to be the catalytic nucleophile involved in galactose transfer with retention of anomeric configuration as accomplished by this enzyme. Moreover, the alpha3GalT structure helps to identify amino acid residues that determine the specificities of the highly homologous ABO histo-blood group and glycosphingolipid glycosyltransferases.


    Organizational Affiliation

    Architecture et Fonction des Macromolécules Biologiques (AFMB), UMR 6098, CNRS and Universités d'Aix-Marseille I and II, 31 Chemin Joseph Aiguier, 13402 Marseille Cedex 20, France. gastinel@afmb.cnrs-mrs.fr




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
N-ACETYLLACTOSAMINIDE ALPHA-1,3-GALACTOSYLTRANSFERASE
N
310Bos taurusGene Names: GGTA1
EC: 2.4.1.87
Find proteins for P14769 (Bos taurus)
Go to UniProtKB:  P14769
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
N
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.237 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 95.670α = 90.00
b = 95.670β = 90.00
c = 112.930γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
SOLVEphasing
CNSrefinement
CCP4data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-07-28
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance