3EJS

Golgi alpha-Mannosidase II in complex with 5-substituted swainsonine analog: (5S)-5-[2'-(4-tert-butylphenyl)ethyl]-swainsonine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.35 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.191 

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

Structural Investigation of the Binding of 5-Substituted Swainsonine Analogues to Golgi alpha-Mannosidase II.

Kuntz, D.A.Nakayama, S.Shea, K.Hori, H.Uto, Y.Nagasawa, H.Rose, D.R.

(2010) Chembiochem 11: 673-680

  • DOI: https://doi.org/10.1002/cbic.200900750
  • Primary Citation of Related Structures:  
    3EJP, 3EJQ, 3EJR, 3EJS, 3EJT, 3EJU

  • PubMed Abstract: 

    Golgi alpha-mannosidase II (GMII) is a key enzyme in the N-glycosylation pathway and is a potential target for cancer chemotherapy. The natural product swainsonine is a potent inhibitor of GMII. In this paper we characterize the binding of 5alpha-substituted swainsonine analogues to the soluble catalytic domain of Drosophila GMII by X-ray crystallography. These inhibitors enjoy an advantage over previously reported GMII inhibitors in that they did not significantly decrease the inhibitory potential of the swainsonine head-group. The phenyl groups of these analogues occupy a portion of the binding site not previously seen to be populated with either substrate analogues or other inhibitors and they form novel hydrophobic interactions. They displace a well-organized water cluster, but the presence of a C(10) carbonyl allows the reestablishment of important hydrogen bonds. Already approximately tenfold more active against the Golgi enzyme than the lysosomal enzyme, these inhibitors offer the potential of being extended into the N-acetylglucosamine binding site of GMII for the creation of even more potent and selective GMII inhibitors.


  • Organizational Affiliation

    Ontario Cancer Institute and Department of Medical Biophysics, University of Toronto, 101 College Street, Toronto, Ontario, M5G 1L7, Canada.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Alpha-mannosidase 21,045Drosophila melanogasterMutation(s): 0 
Gene Names: alpha-Man-IIGmII
EC: 3.2.1.114
UniProt
Find proteins for Q24451 (Drosophila melanogaster)
Explore Q24451 
Go to UniProtKB:  Q24451
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ24451
Glycosylation
Glycosylation Sites: 1Go to GlyGen: Q24451-1
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
HN5 PDBBind:  3EJS IC50: 250 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.35 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.191 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 69.343α = 90
b = 110.425β = 90
c = 139.857γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
CNSrefinement
PDB_EXTRACTdata extraction
ADSCdata collection
HKL-2000data reduction
SADABSdata scaling
CNSphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-10-13
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 1.2: 2019-07-24
    Changes: Data collection, Derived calculations, Refinement description
  • Version 1.3: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Database references, Derived calculations, Structure summary
  • Version 1.4: 2023-08-30
    Changes: Data collection, Database references, Refinement description, Structure summary
  • Version 1.5: 2024-11-20
    Changes: Structure summary