3EJT

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.35 Å
  • R-Value Free: 0.176 
  • R-Value Work: 0.158 
  • R-Value Observed: 0.158 

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Ligand Structure Quality Assessment 


This is version 1.3 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: 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 ...

    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)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Alpha-mannosidase 2A1045Drosophila melanogasterMutation(s): 0 
Gene Names: alpha-Man-IIGmIIalpha-Man-IIaCG18802
EC: 3.2.1.114
UniProt
Find proteins for Q24451 (Drosophila melanogaster)
Explore Q24451 
Go to UniProtKB:  Q24451
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HN6 (Subject of Investigation/LOI)
Query on HN6

Download Ideal Coordinates CCD File 
F [auth A](1S,2R,5R,8R,8aR)-5-[2-(4-tert-butylphenyl)ethyl]octahydroindolizine-1,2,8-triol
C20 H31 N O3
QXPSLCODOUKVQZ-FVVUREQNSA-N
 Ligand Interaction
NAG (Subject of Investigation/LOI)
Query on NAG

Download Ideal Coordinates CCD File 
B [auth A]2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
MRD
Query on MRD

Download Ideal Coordinates CCD File 
D [auth A](4R)-2-METHYLPENTANE-2,4-DIOL
C6 H14 O2
SVTBMSDMJJWYQN-RXMQYKEDSA-N
 Ligand Interaction
DMS
Query on DMS

Download Ideal Coordinates CCD File 
E [auth A]DIMETHYL SULFOXIDE
C2 H6 O S
IAZDPXIOMUYVGZ-UHFFFAOYSA-N
 Ligand Interaction
ZN
Query on ZN

Download Ideal Coordinates CCD File 
C [auth A]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
HN6 PDBBind:  3EJT IC50: 44 (nM) from 1 assay(s)
Binding MOAD:  3EJT IC50: 44 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.35 Å
  • R-Value Free: 0.176 
  • R-Value Work: 0.158 
  • R-Value Observed: 0.158 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 69.372α = 90
b = 110.384β = 90
c = 139.924γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
CNSrefinement
PDB_EXTRACTdata extraction
ADSCdata collection
HKL-2000data reduction
SADABSdata scaling
CNSphasing

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-10-13
    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