5F0E

Murine endoplasmic reticulum alpha-glucosidase II


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.74 Å
  • R-Value Free: 0.169 
  • R-Value Work: 0.141 
  • R-Value Observed: 0.143 

wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history


Literature

Structures of mammalian ER alpha-glucosidase II capture the binding modes of broad-spectrum iminosugar antivirals.

Caputo, A.T.Alonzi, D.S.Marti, L.Reca, I.B.Kiappes, J.L.Struwe, W.B.Cross, A.Basu, S.Lowe, E.D.Darlot, B.Santino, A.Roversi, P.Zitzmann, N.

(2016) Proc Natl Acad Sci U S A 113: E4630-E4638

  • DOI: 10.1073/pnas.1604463113
  • Primary Citation of Related Structures:  
    5IED, 5IEF, 5IEE, 5IEG, 5H9O, 5HJO, 5HJR, 5F0E

  • PubMed Abstract: 
  • The biosynthesis of enveloped viruses depends heavily on the host cell endoplasmic reticulum (ER) glycoprotein quality control (QC) machinery. This dependency exceeds the dependency of host glycoproteins, offering a window for the targeting of ERQC for the development of broad-spectrum antivirals ...

    The biosynthesis of enveloped viruses depends heavily on the host cell endoplasmic reticulum (ER) glycoprotein quality control (QC) machinery. This dependency exceeds the dependency of host glycoproteins, offering a window for the targeting of ERQC for the development of broad-spectrum antivirals. We determined small-angle X-ray scattering (SAXS) and crystal structures of the main ERQC enzyme, ER α-glucosidase II (α-GluII; from mouse), alone and in complex with key ligands of its catalytic cycle and antiviral iminosugars, including two that are in clinical trials for the treatment of dengue fever. The SAXS data capture the enzyme's quaternary structure and suggest a conformational rearrangement is needed for the simultaneous binding of a monoglucosylated glycan to both subunits. The X-ray structures with key catalytic cycle intermediates highlight that an insertion between the +1 and +2 subsites contributes to the enzyme's activity and substrate specificity, and reveal that the presence of d-mannose at the +1 subsite renders the acid catalyst less efficient during the cleavage of the monoglucosylated substrate. The complexes with iminosugar antivirals suggest that inhibitors targeting a conserved ring of aromatic residues between the α-GluII +1 and +2 subsites would have increased potency and selectivity, thus providing a template for further rational drug design.


    Organizational Affiliation

    Oxford Glycobiology Institute, Department of Biochemistry, University of Oxford, Oxford OX1 3QU, United Kingdom; pietro.roversi@bioch.ox.ac.uk nicole.zitzmann@bioch.ox.ac.uk.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Neutral alpha-glucosidase ABA857Mus musculusMutation(s): 0 
Gene Names: GanabG2anKiaa0088
EC: 3.2.1.84 (PDB Primary Data), 3.2.1.207 (UniProt)
UniProt
Find proteins for Q8BHN3 (Mus musculus)
Explore Q8BHN3 
Go to UniProtKB:  Q8BHN3
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Glucosidase 2 subunit betaB88Mus musculusMutation(s): 0 
Gene Names: Prkcsh
UniProt & NIH Common Fund Data Resources
Find proteins for O08795 (Mus musculus)
Explore O08795 
Go to UniProtKB:  O08795
IMPC:  MGI:107877
Protein Feature View
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 3
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseC2 N-Glycosylation Oligosaccharides Interaction
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
P6G
Query on P6G

Download Ideal Coordinates CCD File 
G [auth A], H [auth A], I [auth A]HEXAETHYLENE GLYCOL
C12 H26 O7
IIRDTKBZINWQAW-UHFFFAOYSA-N
 Ligand Interaction
PG4
Query on PG4

Download Ideal Coordinates CCD File 
D [auth A], E [auth A], F [auth A]TETRAETHYLENE GLYCOL
C8 H18 O5
UWHCKJMYHZGTIT-UHFFFAOYSA-N
 Ligand Interaction
EDO
Query on EDO

Download Ideal Coordinates CCD File 
J [auth A], K [auth A], L [auth A]1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
FMT
Query on FMT

Download Ideal Coordinates CCD File 
M [auth A] , N [auth A] , O [auth A] , P [auth A] , Q [auth A] , R [auth A] , S [auth A] , T [auth A] , 
M [auth A],  N [auth A],  O [auth A],  P [auth A],  Q [auth A],  R [auth A],  S [auth A],  T [auth A],  U [auth A],  V [auth A],  W [auth A]
FORMIC ACID
C H2 O2
BDAGIHXWWSANSR-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

Download Ideal Coordinates CCD File 
X [auth B], Y [auth B]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.74 Å
  • R-Value Free: 0.169 
  • R-Value Work: 0.141 
  • R-Value Observed: 0.143 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 104.144α = 90
b = 173.773β = 90
c = 62.836γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Wellcome TrustUnited Kingdom097300/Z/11/Z

Revision History  (Full details and data files)

  • Version 1.0: 2016-07-27
    Type: Initial release
  • Version 1.1: 2016-08-03
    Changes: Database references
  • Version 1.2: 2016-08-24
    Changes: Database references
  • Version 1.3: 2017-08-16
    Changes: Data collection
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Derived calculations, Structure summary