Structure of family 1 beta-glucosidase from Thermotoga maritima in complex with 3-imino-2-oxa-(+)-8-epi-castanospermine

Experimental Data Snapshot

  • Resolution: 2.00 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.187 

Starting Model: experimental
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This is version 1.3 of the entry. See complete history


Glycosidase Inhibition by Ring-Modified Castanospermine Analogues: Tackling Enzyme Selectivity by Inhibitor Tailoring.

Aguilar-Moncayo, M.Gloster, T.M.Turkenburg, J.P.Garcia-Moreno, M.I.Ortiz Mellet, C.Davies, G.J.Garcia Fernandez, J.M.

(2009) Org Biomol Chem 7: 2738

  • DOI: https://doi.org/10.1039/b906968b
  • Primary Citation of Related Structures:  
    2WBG, 2WC3, 2WC4

  • PubMed Abstract: 

    Synthesis of a panel of iso(thio)urea-type ring-modified castanospermine analogues bearing a freely mutarotating pseudoanomeric hydroxyl group results in tight-binding beta-glucosidase inhibitors with unusual binding signatures; the presence of an N-octyl substituent imparts a remarkable anomeric selectivity, promoting strong binding of the appropriate beta-anomer by the beta-glucosidase.

  • Organizational Affiliation

    Departamento de Química Orgánica, Facultad de Química, Universidad de Sevilla, Profesor García González 1, 41012, Sevilla, (Spain).

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C, D
468Thermotoga maritimaMutation(s): 0 
Find proteins for Q08638 (Thermotoga maritima (strain ATCC 43589 / DSM 3109 / JCM 10099 / NBRC 100826 / MSB8))
Explore Q08638 
Go to UniProtKB:  Q08638
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ08638
Sequence Annotations
  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
AM3 PDBBind:  2WC3 Ki: 830 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 2.00 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.187 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 103.812α = 90
b = 73.965β = 108.49
c = 119.318γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata 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: 2009-04-14
    Type: Initial release
  • Version 1.1: 2012-08-01
    Changes: Atomic model, Database references, Derived calculations, Non-polymer description, Other, Refinement description, Version format compliance
  • Version 1.2: 2017-07-12
    Changes: Data collection
  • Version 1.3: 2023-12-13
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description