5O0S

Crystal structure of txGH116 (beta-glucosidase from Thermoanaerobacterium xylolyticum) in complex with unreacted beta Cyclophellitol Cyclosulfate probe ME711


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.16 Å
  • R-Value Free: 0.163 
  • R-Value Work: 0.139 
  • R-Value Observed: 0.140 

Starting Model: experimental
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This is version 1.2 of the entry. See complete history


Literature

1,6-Cyclophellitol Cyclosulfates: A New Class of Irreversible Glycosidase Inhibitor.

Artola, M.Wu, L.Ferraz, M.J.Kuo, C.L.Raich, L.Breen, I.Z.Offen, W.A.Codee, J.D.C.van der Marel, G.A.Rovira, C.Aerts, J.M.F.G.Davies, G.J.Overkleeft, H.S.

(2017) ACS Cent Sci 3: 784-793

  • DOI: https://doi.org/10.1021/acscentsci.7b00214
  • Primary Citation of Related Structures:  
    5NPB, 5NPC, 5NPD, 5NPE, 5NPF, 5O0S

  • PubMed Abstract: 

    The essential biological roles played by glycosidases, coupled to the diverse therapeutic benefits of pharmacologically targeting these enzymes, provide considerable motivation for the development of new inhibitor classes. Cyclophellitol epoxides and aziridines are recently established covalent glycosidase inactivators. Inspired by the application of cyclic sulfates as electrophilic equivalents of epoxides in organic synthesis, we sought to test whether cyclophellitol cyclosulfates would similarly act as irreversible glycosidase inhibitors. Here we present the synthesis, conformational analysis, and application of novel 1,6-cyclophellitol cyclosulfates. We show that 1,6- epi -cyclophellitol cyclosulfate (α-cyclosulfate) is a rapidly reacting α-glucosidase inhibitor whose 4 C 1 chair conformation matches that adopted by α-glucosidase Michaelis complexes. The 1,6-cyclophellitol cyclosulfate (β-cyclosulfate) reacts more slowly, likely reflecting its conformational restrictions. Selective glycosidase inhibitors are invaluable as mechanistic probes and therapeutic agents, and we propose cyclophellitol cyclosulfates as a valuable new class of carbohydrate mimetics for application in these directions.


  • Organizational Affiliation

    Department of Bio-organic Synthesis and Department of Medical Biochemistry, Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Glucosylceramidase787Thermoanaerobacterium xylanolyticum LX-11Mutation(s): 0 
Gene Names: Thexy_2211
EC: 3.2.1.45
UniProt
Find proteins for F6BL85 (Thermoanaerobacterium xylanolyticum (strain ATCC 49914 / DSM 7097 / LX-11))
Explore F6BL85 
Go to UniProtKB:  F6BL85
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupF6BL85
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
9FQ
Query on 9FQ

Download Ideal Coordinates CCD File 
L [auth A](3~{a}~{S},4~{R},5~{S},6~{R},7~{R},7~{a}~{R})-7-(hydroxymethyl)-2,2-bis(oxidanylidene)-3~{a},4,5,6,7,7~{a}-hexahydrobenzo[d][1,3,2]dioxathiole-4,5,6-triol
C7 H12 O8 S
ZCXRKCCKXOHKLN-GEGSFZHJSA-N
EDO
Query on EDO

Download Ideal Coordinates CCD File 
B [auth A]
C [auth A]
D [auth A]
E [auth A]
F [auth A]
B [auth A],
C [auth A],
D [auth A],
E [auth A],
F [auth A],
G [auth A],
H [auth A],
I [auth A],
J [auth A]
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
CA
Query on CA

Download Ideal Coordinates CCD File 
K [auth A]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.16 Å
  • R-Value Free: 0.163 
  • R-Value Work: 0.139 
  • R-Value Observed: 0.140 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 178.17α = 90
b = 53.731β = 90
c = 83.138γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
xia2data reduction
Aimlessdata scaling
Cootmodel building
MOLREPphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
European Research CouncilUnited KingdomErC-2012-AdG-322942

Revision History  (Full details and data files)

  • Version 1.0: 2017-08-09
    Type: Initial release
  • Version 1.1: 2017-08-23
    Changes: Database references
  • Version 1.2: 2024-01-17
    Changes: Data collection, Database references, Refinement description