4J27

Crystal structure of a gh29 alpha-l-fucosidase gh29 from bacteroides thetaiotaomicron in a novel crystal form

• PDB DOI: https://doi.org/10.2210/pdb4J27/pdb

• Classification: HYDROLASE
• Organism(s): Bacteroides thetaiotaomicron VPI-5482
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2013-02-04 Released: 2013-05-08 
• Deposition Author(s): Wright, D.W.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.59 Å
• R-Value Free: 0.177 
• R-Value Work: 0.158 
• R-Value Observed: 0.159 

Literature

Three dimensional structure of a bacterial alpha-l-fucosidase with a 5-membered iminocyclitol inhibitor.

Wright, D.W., Moreno-Vargas, A.J., Carmona, A.T., Robina, I., Davies, G.J.

(2013) Bioorg Med Chem 21: 4751-4754

• PubMed: 23830696 
• DOI: https://doi.org/10.1016/j.bmc.2013.05.056
• Primary Citation of Related Structures:  
  4J27, 4J28


• PubMed Abstract: 
  

  Fucosidases, enzymes that cleave fucose from the non-reducing end of a glycan, represent promising medicinal targets reflecting their roles in cancer metastasis, inflammation, host-parasite interactions and the lysosomal storage disorder fucosidosis. The X-ray crystal structures of Bacteroides thetaiotaomicron GH29 α-l-fucosidase (BtFuc2970) in a new crystal form (at a resolution of 1.59Å) and liganded with a 5-membered iminocyclitol inhibitor (1.73Å) are reported herein. The 5-membered iminocyclitol binds in a (3)E conformation, mimicking the proposed (3)H4 half chair transition-state of the enzyme catalysed reaction, and its Ki for BtFuc2970 was determined as 2μM. Structural analysis of fucosidase inhibition through 5-membered iminocyclitols will aid in the rational design of more potent fucosidase inhibitors for treatment of a range of medical conditions.

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Organizational Affiliation: 

Structural Biology Laboratory, Department of Chemistry, University of York, York YO10 5DD, United Kingdom.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 105.26 kDa 
• Atom Count: 8,300 
• Modelled Residue Count: 877 
• Deposited Residue Count: 900 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Alpha-L-fucosidase	A, B	450	Bacteroides thetaiotaomicron VPI-5482	Mutation(s): 0
UniProt
Find proteins for Q8A3I4 (Bacteroides thetaiotaomicron (strain ATCC 29148 / DSM 2079 / JCM 5827 / CCUG 10774 / NCTC 10582 / VPI-5482 / E50)) Explore Q8A3I4  Go to UniProtKB:  Q8A3I4

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	E [auth A], F [auth A], L [auth B], M [auth B]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
GOL	G [auth A], H [auth A], N [auth B], O [auth B]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N
IMD	C [auth A], D [auth A], I [auth B], J [auth B], K [auth B]	IMIDAZOLE C3 H5 N2 RAXXELZNTBOGNW-UHFFFAOYSA-O

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.59 Å
• R-Value Free: 0.177 
• R-Value Work: 0.158 
• R-Value Observed: 0.159 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 68.15	α = 90
b = 96.55	β = 91.3
c = 97.27	γ = 90

Software Package:

Software Name	Purpose
SCALA	data scaling
MOLREP	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
MOSFLM	data reduction

Structure Validation

Entry History 

Deposition Data

• Released Date: 2013-05-08 
Deposition Author(s): Wright, D.W.

Revision History  

• Version 1.0: 2013-05-08
  Type: Initial release
  
• Version 1.1: 2013-08-28
  Changes: Database references
• Version 1.2: 2023-09-20
  Changes: Data collection, Database references, Derived calculations, Refinement description