5C3B

Crystal structure of ABBA + UDP-C-Gal (long soak) + DI


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.40 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.184 

Starting Model: experimental
View more details

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.5 of the entry. See complete history


Literature

High Resolution Structures of the Human ABO(H) Blood Group Enzymes in Complex with Donor Analogs Reveal That the Enzymes Utilize Multiple Donor Conformations to Bind Substrates in a Stepwise Manner.

Gagnon, S.M.Meloncelli, P.J.Zheng, R.B.Haji-Ghassemi, O.Johal, A.R.Borisova, S.N.Lowary, T.L.Evans, S.V.

(2015) J Biol Chem 290: 27040-27052

  • DOI: https://doi.org/10.1074/jbc.M115.682401
  • Primary Citation of Related Structures:  
    5BXC, 5C1G, 5C1H, 5C1L, 5C36, 5C38, 5C3A, 5C3B, 5C3D, 5C47, 5C48, 5C49, 5C4B, 5C4C, 5C4D, 5C4E, 5C4F, 5C8R

  • PubMed Abstract: 

    Homologous glycosyltransferases α-(1→3)-N-acetylgalactosaminyltransferase (GTA) and α-(1→3)-galactosyltransferase (GTB) catalyze the final step in ABO(H) blood group A and B antigen synthesis through sugar transfer from activated donor to the H antigen acceptor. These enzymes have a GT-A fold type with characteristic mobile polypeptide loops that cover the active site upon substrate binding and, despite intense investigation, many aspects of substrate specificity and catalysis remain unclear. The structures of GTA, GTB, and their chimeras have been determined to between 1.55 and 1.39 Å resolution in complex with natural donors UDP-Gal, UDP-Glc and, in an attempt to overcome one of the common problems associated with three-dimensional studies, the non-hydrolyzable donor analog UDP-phosphono-galactose (UDP-C-Gal). Whereas the uracil moieties of the donors are observed to maintain a constant location, the sugar moieties lie in four distinct conformations, varying from extended to the "tucked under" conformation associated with catalysis, each stabilized by different hydrogen bonding partners with the enzyme. Further, several structures show clear evidence that the donor sugar is disordered over two of the observed conformations and so provide evidence for stepwise insertion into the active site. Although the natural donors can both assume the tucked under conformation in complex with enzyme, UDP-C-Gal cannot. Whereas UDP-C-Gal was designed to be "isosteric" with natural donor, the small differences in structure imposed by changing the epimeric oxygen atom to carbon appear to render the enzyme incapable of binding the analog in the active conformation and so preclude its use as a substrate mimic in GTA and GTB.


  • Organizational Affiliation

    Department of Biochemistry and Microbiology, University of Victoria, Victoria, British Columbia V8W 3P6, Canada and.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Histo-blood group ABO system transferase298Homo sapiensMutation(s): 2 
Gene Names: ABO
EC: 2.4.1.40 (PDB Primary Data), 2.4.1.37 (PDB Primary Data)
UniProt & NIH Common Fund Data Resources
Find proteins for P16442 (Homo sapiens)
Explore P16442 
Go to UniProtKB:  P16442
PHAROS:  P16442
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP16442
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
URM
Query on URM

Download Ideal Coordinates CCD File 
D [auth A](((2S,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)methyl)phosphonic (((2R,3S,4R,5R)-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-3,4-dihydroxytetrahydrofuran-2-yl)methyl phosphoric) anhydride
C16 H26 N2 O16 P2
WUPLBUVQIJIOHV-PPSAJGQHSA-N
DA8
Query on DA8

Download Ideal Coordinates CCD File 
C [auth A]octyl 3-deoxy-2-O-(6-deoxy-alpha-L-galactopyranosyl)-beta-D-xylo-hexopyranoside
C20 H38 O9
FBVFDKBCZLMLQT-PPCMOIRNSA-N
MN
Query on MN

Download Ideal Coordinates CCD File 
B [auth A]MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.40 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.184 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 52.53α = 90
b = 149.55β = 90
c = 79.18γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
d*TREKdata scaling
PDB_EXTRACTdata extraction
Cootmodel building
PHASERphasing
CrystalCleardata reduction

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Canadian Institutes of Health Research (CIHR)CanadaMOP-77655

Revision History  (Full details and data files)

  • Version 1.0: 2015-09-23
    Type: Initial release
  • Version 1.1: 2015-09-30
    Changes: Database references
  • Version 1.2: 2015-11-18
    Changes: Data collection, Database references
  • Version 1.3: 2018-03-07
    Changes: Data collection, Derived calculations
  • Version 1.4: 2020-01-08
    Changes: Author supporting evidence
  • Version 1.5: 2023-09-27
    Changes: Data collection, Database references, Derived calculations, Refinement description