2XSG

Structure of the gh92 family glycosyl hydrolase ccman5


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.193 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

A Bacterial Glycosidase Enables Mannose-6-Phosphate Modification and Improved Cellular Uptake of Yeast-Produced Recombinant Human Lysosomal Enzymes.

Tiels, P.Baranova, E.Piens, K.De Visscher, C.Pynaert, G.Nerinckx, W.Stout, J.Fudalej, F.Hulpiau, P.Tannler, S.Geysens, S.Van Hecke, A.Valevska, A.Vervecken, W.Remaut, H.Callewaert, N.

(2012) Nat Biotechnol 30: 1225

  • DOI: https://doi.org/10.1038/nbt.2427
  • Primary Citation of Related Structures:  
    2XSG, 4AQ0

  • PubMed Abstract: 

    Lysosomal storage diseases are treated with human lysosomal enzymes produced in mammalian cells. Such enzyme therapeutics contain relatively low levels of mannose-6-phosphate, which is required to target them to the lysosomes of patient cells. Here we describe a method for increasing mannose-6-phosphate modification of lysosomal enzymes produced in yeast. We identified a glycosidase from C. cellulans that 'uncaps' N-glycans modified by yeast-type mannose-Pi-6-mannose to generate mammalian-type N-glycans with a mannose-6-phosphate substitution. Determination of the crystal structure of this glycosidase provided insight into its substrate specificity. We used this uncapping enzyme together with α-mannosidase to produce in yeast a form of the Pompe disease enzyme α-glucosidase rich in mannose-6-phosphate. Compared with the currently used therapeutic version, this form of α-glucosidase was more efficiently taken up by fibroblasts from Pompe disease patients, and it more effectively reduced cardiac muscular glycogen storage in a mouse model of the disease.


  • Organizational Affiliation

    Unit for Medical Biotechnology, Department for Molecular Biomedical Research, VIB, Ghent, Belgium.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
CCMAN5
A, B
774Cellulosimicrobium cellulansMutation(s): 0 
EC: 3.2.1.24
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.193 
  • Space Group: P 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 82.202α = 90
b = 91.158β = 90
c = 224.523γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-10-12
    Type: Initial release
  • Version 1.1: 2013-02-06
    Changes: Database references