1LZI

Glycosyltransferase A + UDP + H antigen acceptor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.35 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.182 

wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history


Literature

The structural basis for specificity in human ABO(H) blood group biosynthesis.

Patenaude, S.I.Seto, N.O.Borisova, S.N.Szpacenko, A.Marcus, S.L.Palcic, M.M.Evans, S.V.

(2002) Nat Struct Biol 9: 685-690

  • DOI: 10.1038/nsb832
  • Primary Citation of Related Structures:  
    1LZ0, 1LZ7, 1LZJ, 1LZI

  • PubMed Abstract: 
  • The human ABO(H) blood group antigens are produced by specific glycosyltransferase enzymes. An N-acetylgalactosaminyltransferase (GTA) uses a UDP-GalNAc donor to convert the H-antigen acceptor to the A antigen, whereas a galactosyltransferase (GTB) uses a UDP-galactose donor to convert the H-antigen acceptor to the B antigen ...

    The human ABO(H) blood group antigens are produced by specific glycosyltransferase enzymes. An N-acetylgalactosaminyltransferase (GTA) uses a UDP-GalNAc donor to convert the H-antigen acceptor to the A antigen, whereas a galactosyltransferase (GTB) uses a UDP-galactose donor to convert the H-antigen acceptor to the B antigen. GTA and GTB differ only in the identity of four critical amino acid residues. Crystal structures at 1.8-1.32 A resolution of the GTA and GTB enzymes both free and in complex with disaccharide H-antigen acceptor and UDP reveal the basis for donor and acceptor specificity and show that only two of the critical amino acid residues are positioned to contact donor or acceptor substrates. Given the need for stringent stereo- and regioselectivity in this biosynthesis, these structures further demonstrate that the ability of the two enzymes to distinguish between the A and B donors is largely determined by a single amino acid residue.


    Organizational Affiliation

    Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, K1H 8M5 Canada.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Glycosyltransferase AA292Homo sapiensMutation(s): 0 
Gene Names: ABO
EC: 2.4.1.40 (PDB Primary Data), 2.4.1.37 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for P16442 (Homo sapiens)
Explore P16442 
Go to UniProtKB:  P16442
PHAROS:  P16442
Protein Feature View
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
alpha-L-fucopyranose-(1-2)-hexyl beta-D-galactopyranosideB2N/AN/A Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G40799EF
GlyCosmos:  G40799EF
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.35 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.182 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 52.81α = 90
b = 149.58β = 90
c = 79.97γ = 90
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data reduction
SCALEPACKdata scaling
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-08-28
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2017-10-11
    Changes: Data collection
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Structure summary