7S69

N-acetylglucosamine-1-phosphotransferase (GNPT) gamma subunit (GNPTG), from clawed frog


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.04 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.196 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structures of the mannose-6-phosphate pathway enzyme, GlcNAc-1-phosphotransferase.

Gorelik, A.Illes, K.Bui, K.H.Nagar, B.

(2022) Proc Natl Acad Sci U S A 119: e2203518119-e2203518119

  • DOI: https://doi.org/10.1073/pnas.2203518119
  • Primary Citation of Related Structures:  
    7S69, 7S6N, 7SJ2

  • PubMed Abstract: 

    The mannose-6-phosphate (M6P) pathway is responsible for the transport of hydrolytic enzymes to lysosomes. N-acetylglucosamine-1-phosphotransferase (GNPT) catalyzes the first step of tagging these hydrolases with M6P, which when recognized by receptors in the Golgi diverts them to lysosomes. Genetic defects in the GNPT subunits, GNPTAB and GNPTG, cause the lysosomal storage diseases mucolipidosis types II and III. To better understand its function, we determined partial three-dimensional structures of the GNPT complex. The catalytic domain contains a deep cavity for binding of uridine diphosphate- N -acetylglucosamine, and the surrounding residues point to a one-step transfer mechanism. An isolated structure of the gamma subunit of GNPT reveals that it can bind to mannose-containing glycans in different configurations, suggesting that it may play a role in directing glycans into the active site. These findings may facilitate the development of therapies for lysosomal storage diseases.


  • Organizational Affiliation

    Department of Biochemistry, McGill University, Montreal, QC H3G 0B1, Canada.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
N-acetylglucosamine-1-phosphotransferase gamma subunit
A, B
293Xenopus laevisMutation(s): 0 
Gene Names: LOC446283
UniProt
Find proteins for Q561K8 (Xenopus laevis)
Explore Q561K8 
Go to UniProtKB:  Q561K8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ561K8
Glycosylation
Glycosylation Sites: 1
Sequence Annotations
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChains Length2D Diagram Glycosylation3D Interactions
alpha-D-mannopyranose-(1-3)-alpha-D-mannopyranose-(1-6)-[alpha-D-mannopyranose-(1-3)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
C
6N-Glycosylation
Glycosylation Resources
GlyTouCan:  G09724ZC
GlyCosmos:  G09724ZC
GlyGen:  G09724ZC
Entity ID: 3
MoleculeChains Length2D Diagram Glycosylation3D Interactions
alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-6)-[alpha-D-mannopyranose-(1-3)]alpha-D-mannopyranose-(1-6)-[alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
D
9N-Glycosylation
Glycosylation Resources
GlyTouCan:  G83161QT
GlyCosmos:  G83161QT
GlyGen:  G83161QT
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download Ideal Coordinates CCD File 
E [auth A]
F [auth A]
G [auth A]
H [auth A]
I [auth A]
E [auth A],
F [auth A],
G [auth A],
H [auth A],
I [auth A],
J [auth A],
K [auth B],
L [auth B],
M [auth B],
N [auth B]
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.04 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.196 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 50.317α = 90
b = 61.684β = 90
c = 163.029γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Canadian Institutes of Health Research (CIHR)CanadaPJT-173264

Revision History  (Full details and data files)

  • Version 1.0: 2022-05-25
    Type: Initial release
  • Version 1.1: 2022-08-17
    Changes: Database references
  • Version 1.2: 2023-10-18
    Changes: Data collection, Refinement description
  • Version 1.3: 2024-10-09
    Changes: Structure summary