5TJK

Crystal structure of GTA + A trisaccharide (native)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.182 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

High-resolution crystal structures and STD NMR mapping of human ABO(H) blood group glycosyltransferases in complex with trisaccharide reaction products suggest a molecular basis for product release.

Gagnon, S.M.L.Legg, M.S.G.Sindhuwinata, N.Letts, J.A.Johal, A.R.Schuman, B.Borisova, S.N.Palcic, M.M.Peters, T.Evans, S.V.

(2017) Glycobiology 27: 966-977

  • DOI: 10.1093/glycob/cwx053
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The human ABO(H) blood group A- and B-synthesizing glycosyltransferases GTA and GTB have been structurally characterized to high resolution in complex with their respective trisaccharide antigen products. These findings are particularly timely and re ...

    The human ABO(H) blood group A- and B-synthesizing glycosyltransferases GTA and GTB have been structurally characterized to high resolution in complex with their respective trisaccharide antigen products. These findings are particularly timely and relevant given the dearth of glycosyltransferase structures collected in complex with their saccharide reaction products. GTA and GTB utilize the same acceptor substrates, oligosaccharides terminating with α-l-Fucp-(1→2)-β-d-Galp-OR (where R is a glycolipid or glycoprotein), but use distinct UDP donor sugars, UDP-N-acetylgalactosamine and UDP-galactose, to generate the blood group A (α-l-Fucp-(1→2)[α-d-GalNAcp-(1→3)]-β-d-Galp-OR) and blood group B (α-l-Fucp-(1→2)[α-d-Galp-(1→3)]-β-d-Galp-OR) determinant structures, respectively. Structures of GTA and GTB in complex with their respective trisaccharide products reveal a conflict between the transferred sugar monosaccharide and the β-phosphate of the UDP donor. Mapping of the binding epitopes by saturation transfer difference NMR measurements yielded data consistent with the X-ray structural results. Taken together these data suggest a mechanism of product release where monosaccharide transfer to the H-antigen acceptor induces active site disorder and ejection of the UDP leaving group prior to trisaccharide egress.


    Organizational Affiliation

    Institute of Chemistry, University of Lübeck, Ratzeburger Allee 160, 23562 Lübeck, Germany.,Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada T6G 2G2.,Department of Biochemistry & Microbiology, University of Victoria, Victoria, British Columbia, Canada V8W 3P6.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Histo-blood group ABO system transferase
A
297Homo sapiensMutation(s): 0 
Gene Names: ABO
Find proteins for P16442 (Homo sapiens)
Go to Gene View: ABO
Go to UniProtKB:  P16442
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BGA
Query on BGA

Download SDF File 
Download CCD File 
A
alpha-L-Fucp-(1->2)[alpha-D-GalNAcp-(1->3)]-beta-D-Galp-O(CH2)7CH3
C28 H51 N O15
KWIUIOOHQWLSRO-BMPOGBEASA-N
 Ligand Interaction
GOL
Query on GOL

Download SDF File 
Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.182 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 52.550α = 90.00
b = 148.660β = 90.00
c = 79.790γ = 90.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
d*TREKdata scaling
d*TREKdata reduction
REFMACrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Canadian Institutes of Health ResearchCanadaMOP-77655

Revision History 

  • Version 1.0: 2017-06-14
    Type: Initial release
  • Version 1.1: 2017-09-27
    Type: Database references
  • Version 1.2: 2018-03-07
    Type: Data collection