3EE5

Crystal structure of human M340H-Beta1,4-Galactosyltransferase-I (M340H-B4GAL-T1) in complex with GLCNAC-Beta1,3-Gal-Beta-Naphthalenemethanol


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.206 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 2.3 of the entry. See complete history


Literature

Deoxygenated Disaccharide Analogs as Specific Inhibitors of {beta}1-4-Galactosyltransferase 1 and Selectin-mediated Tumor Metastasis

Brown, J.R.Yang, F.Sinha, A.Ramakrishnan, B.Tor, Y.Qasba, P.K.Esko, J.D.

(2009) J Biol Chem 284: 4952-4959

  • DOI: https://doi.org/10.1074/jbc.M805782200
  • Primary Citation of Related Structures:  
    3EE5

  • PubMed Abstract: 

    The disaccharide peracetylated GlcNAcbeta1-3Galbeta-O-naphthalenemethanol (disaccharide 1) diminishes the formation of the glycan sialyl Lewis X (Neu5Acalpha2-3Galbeta1-4(Fucalpha1-3) GlcNAc; sLe(X)) in tumor cells. Previous studies showed that the mechanism of action of disaccharide 1 involves three steps: (i) deacetylation by carboxyesterases, (ii) action as a biosynthetic intermediate for downstream enzymes involved in sLe(X) assembly, and (iii) generation of several glycans related to sLe(X). In this report, we show that GlcNAcbeta1-3Galbeta-O-naphthalenemethanol binds to the acceptor site of human beta1-4-galactosyltransferase much like the acceptor trisaccharide, GlcNAcbeta1-2Manbeta1-6Man, which is present on N-linked glycans. The 4'-deoxy analog, in which the acceptor hydroxyl group was replaced by -H, did not act as a substrate but instead acted as a competitive inhibitor of the enzyme. The acetylated form of this compound inhibited sLe(X) formation in U937 monocytic leukemia cells, suggesting that it had inhibitory activity in vivo as well. A series of synthetic acetylated analogs of 1 containing -H, -F, -N(3), -NH(2), or -OCH(3) instead of the hydroxyl groups at C-3'- and C-4'-positions of the terminal N-acetylglucosamine residue also blocked sLe(X) formation in cells. The reduction of sLe(X) by the 4'-deoxy analog also diminished experimental tumor metastasis by Lewis lung carcinoma in vivo. These data suggest that nonsubstrate disaccharides have therapeutic potential through their ability to bind to glycosyltransferases in vivo and to alter glycan-dependent pathologic processes.


  • Organizational Affiliation

    Department of Cellular and Molecular Medicine, Glycobiology Research and Training Center, University of California, San Diego, La Jolla, California 92093, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Beta-1,4-galactosyltransferase 1
A, B, C
287Homo sapiensMutation(s): 3 
Gene Names: B4GALT1GGTB2
EC: 2.4.1.38 (PDB Primary Data), 2.4.1 (UniProt), 2.4.1.22 (UniProt), 2.4.1.275 (UniProt), 2.4.1.90 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for P15291 (Homo sapiens)
Explore P15291 
Go to UniProtKB:  P15291
PHAROS:  P15291
GTEx:  ENSG00000086062 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP15291
Sequence Annotations
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChains Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-3)-beta-D-galactopyranose
D, E, F
2N/A
Glycosylation Resources
GlyTouCan:  G33476GF
GlyCosmos:  G33476GF
GlyGen:  G33476GF
Small Molecules
Ligands 7 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
UDH
Query on UDH

Download Ideal Coordinates CCD File 
EA [auth C],
G [auth A],
Q [auth B]
6-AMINOHEXYL-URIDINE-C1,5'-DIPHOSPHATE
C15 H27 N3 O12 P2
MLWJBKPFDKRHBM-FMKGYKFTSA-N
MES
Query on MES

Download Ideal Coordinates CCD File 
IA [auth C]2-(N-MORPHOLINO)-ETHANESULFONIC ACID
C6 H13 N O4 S
SXGZJKUKBWWHRA-UHFFFAOYSA-N
2NA
Query on 2NA

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FA [auth C],
H [auth A],
R [auth B]
naphthalen-2-ylmethanol
C11 H10 O
MFGWMAAZYZSWMY-UHFFFAOYSA-N
SO4
Query on SO4

Download Ideal Coordinates CCD File 
AA [auth B]
BA [auth B]
CA [auth B]
I [auth A]
J [auth A]
AA [auth B],
BA [auth B],
CA [auth B],
I [auth A],
J [auth A],
JA [auth C],
K [auth A],
KA [auth C],
L [auth A],
M [auth A],
W [auth B],
X [auth B],
Y [auth B],
Z [auth B]
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
GOL
Query on GOL

Download Ideal Coordinates CCD File 
GA [auth C]
O [auth A]
P [auth A]
S [auth B]
T [auth B]
GA [auth C],
O [auth A],
P [auth A],
S [auth B],
T [auth B],
U [auth B],
V [auth B]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
DIO
Query on DIO

Download Ideal Coordinates CCD File 
HA [auth C]1,4-DIETHYLENE DIOXIDE
C4 H8 O2
RYHBNJHYFVUHQT-UHFFFAOYSA-N
MN
Query on MN

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.206 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 107.127α = 90
b = 195.742β = 90
c = 143.801γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
MERLOTphasing
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-01-06
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Database references, Derived calculations, Structure summary
  • Version 2.1: 2021-10-20
    Changes: Database references, Structure summary
  • Version 2.2: 2023-08-30
    Changes: Data collection, Refinement description
  • Version 2.3: 2024-11-20
    Changes: Structure summary